Derek Fry, 2003. photo Denison Sports Information

So there's this thing called Twitter, where you can share your thoughts in 140 characters or less. The benefit is can share small chunks of info and that can be digested and internalized very easily. The negative is that you can sound very vague, opinionated, and downright arrogant.

I've tweeted over 2400 times and there have been plenty that I had to say, 'that didn't sound right' or 'what I really meant was...'

The last thing I ever want to do is come across as arrogant, but in 140 characters, you have to get to the point and some descriptive words like "in most cases" or "for the most part" get lost in the shuffle. The reason I have any voice in this industry is that 1.) Dave has allowed me to have one and 2.) I have made enough mistakes with the humility to learn from them and experience to fix them to pass that info forward.

So a month ago I published a news post based on a study that Carl Valle shared on his Facebook. I included comments from Valle and Dan Baker which drove the point home. If their thoughts and the study didn't align with my personal beliefs, would I have ever shared this? Probably not.


Not quite so fast: effect of training at 90% sprint speed on maximal and repeated-sprint ability in soccer players.

J Sports Sci. 2014 Dec;32(20):1979-1986. Epub 2014 Nov 11.

Abstract

Abstract The aim of the present study was to investigate the effect of training at an intensity eliciting 90% of maximal sprinting speed on maximal and repeated-sprint performance in soccer. It was hypothesised that sprint training at 90% of maximal velocity would improve soccer-related sprinting. Twenty-two junior club-level male and female soccer players (age 17 ± 1 year, body mass 64 ± 8 kg, body height 174 ± 8 cm) completed an intervention study where the training group (TG) replaced one of their weekly soccer training sessions with a repeated-sprint training session performed at 90% of maximal sprint speed, while the control group (CG) completed regular soccer training according to their teams' original training plans. Countermovement jump, 12 × 20-m repeated-sprint, VO2max and the Yo-Yo Intermittent Recovery Level 1 test were performed prior to and after a 9-week intervention period. No significant between-group differences were observed for any of the performance indices and effect magnitudes were trivial or small. Before rejecting the hypothesis, we recommend that future studies should perform intervention programmes with either stronger stimulus or at other times during the season where total training load is reduced.

Here is the original comment from Carl Valle:

90% isn't going to do much, so if you are going to sprint, time and find out what does help. Hint, more than 90%

Dan Baker had followed up with this statement in reaction to a few inquisitions on the thread. Maybe be a little out of context without the other comments but you get the drift.

This study shows that you do either maximal speed training (@100% OR CLOSE TO IT) or do energy system training (aerobic/anaerobic). Repeat speed does not make you faster or improve repeat sprint ability anymore than normal sport training, so why bother. Buchheits long term study showed if you did max sprint work and aerobic conditioning, you get an improvement in repeat sprint tests (as well as get faster and aerobically fitter). I agree with Carl Valle, get data and make informed decisions on training content.

- Dan Baker

Here are some additional references  Dan provided on the thread in which the abstract was included.

Changes in repeated-sprint performance in relation to change in locomotor profile in highly-trained young soccer players by MARTIN BUCHHEIT & ALBERTO MENDEZ-VILLANUEVA. JSS 2014.

"To conclude, present results show that changes in repeated-sprint performance are moderately-to- largely related to changes in (young) players’ loco- motor profile, which is determined by their maximal sprinting and aerobic speeds. These results suggest that these two key running speeds, which can be easily assessed via low-cost field test, can be used to monitor training-induced changes in more soccer- specific efforts such as repeated sprints."

Given these results based upon longer term training, why bother doing repeat sprint training. GET FAST & GET FIT!, takes care of most shit in soccer, physical wise....

- Dan Baker


So to add more fuel to my fire, Patrick Ward, who I have a ton of respect, quotes Louie Simmons on his Facebook page.

"A strong child is always better at running, jumping, and throwing than a weak child. This formula should work throughout the sports career for all athletes. The max effort method is superior to all training methods, but seldom used in sports. This is ridiculous because the maximal effort method is superior to all methods for improving intramuscular and inter-muscular coordination. Sports science has proven that the CNS and muscles adapt only to the demands or loads placed upon them." - Do I really need to mention who said this?

Ward was referring to Simmons' quote without much judgment.  After some unrelated or misguided comments from some who may have missed the point, Ward added this.

The quote above had nothing to do with training kids though....I think you take it out of context. He was just saying that strong kids usually do things better than weak kids at a young age; however, with athletes we tend to forget that maximal strength is beneficial and opt for other training methods. - Patrick Ward

Oversimplified? Maybe. But, in my opinion, Valle, Baker, Simmons, and Ward are all correct. With the limited resources coaches have the the specific population they work with, strength may be the underlying factor that can improve games speed in field or court sports. The problem was, many coaches feel the answer is much more complicated. In a way they are right. But, every coach's situation is different.  Here is the tweet I sent.

Now, there is a lot more to it than that. My general takeaway points are these. For field and court sports, speed is essentially...

        • The ability to cover as much of the field in the shortest time possible          

 

   

      • Linear speed is defined by a very simple formula: Stride Length x Stride Frequency.

 

     

      • In other words, the more ground you cover on each step and the more steps you can take in a given time, the better.

 

     

      • As coach Buddy Morris has stated stride length is a bi-product of speed and not the reverse. 

 

     

      • A positive fact about speed training is stride length is a more trainable quality than stride frequency.

 

     

      • This half of the equation is enhanced by improved anterior chain flexibility and increased posterior chain and torso strength.

 

     

      • Basically, the more force you apply to the ground, the more ground you will cover.

 

     

      • Strength = Speed. 

 

      The other part of this tweet that needed more definition is the notion of actually running full speed.  I am in no way saying that running at speeds less than 90% will inhibit speed mechanics. My suggestion is only that with the amount of time allotted, full-speed sprinting is a better allocation of resources.  Here is something I wrote about the matter in an my last article, Summer Training for Football.

As a general rule, if an athlete is not running at full speed, they are not developing speed. An athlete sprinting at less than full-speed is usually not attributed to effort, but rather fatigue due to condensed rest intervals or inappropriate volume. Determining rest intervals can be as simple as understanding the applicable work to rest ratio. We have adapted a formula from Charlie Francis for non-track athletes. Normally, at least 30 seconds of rest for each second a sprint lasts. For example, if an athlete is sprinting a 40 yard dash in approximately 5 seconds; that rest interval should be about two and a half minutes. Total volume should usually be about 200-300 yards for all combined sprints.

Remember where my background and experience has been. I am not a track coach, a biomechanist, or and exercise physiologist. I was a coach who needed to train a large amount of athletes in a short amount of time. So the tweet I sent had quite a few favorites and retweets along with a few replies from coaches like Jeremy Boone who agreed with the basic sentiment. And then I got this reply....

So my first inclination is to say, "Ok, buddy. You aren't getting away with that. You have to elaborate.  Turns out Stuart McMillan is pretty smart and writes a blog.  I ironically he is currently writing a 5 part series on strength training. I have no idea who he trains, but as you will see, he has a following.


So, I will give a play-by-play of the twitter responses. I am really glad it happened, because even if I am wrong it would be a great learning experience for me and anyone else following. So here goes:

Speed Training on Twitter

I will screen shot these instead of embedding them for lack of time.

Screen Shot 2015-07-16 at 4.37.44 PM

So what I learned from this interaction is that I am labeled as a Charlie Francis guy, which is good with me. There is a great  point by Gieseppe in the fact that can athletes really produce 95% and my question is: Can they really tell the difference?  I had enough issues for them deciphering between half-speed and 3-quarter speed. Finally I agree with Ross. How much time do we really have to teach mechanics when they are learning other sport skills. As I started to learn Stuart's background, it became more clear.

Screen Shot 2015-07-16 at 4.51.22 PM

So, Stuart is talking about training elite Jamaicans and I'm talking about training college, non-track athletes. No wonder we aren't connecting at this point. Some of the replies are hidden and people are asking for non Charlie Francis resources from Stuart.

From there, Ross Bennet made a few statements about the dilemma of speed mechanics and field sports.

Athletes in 'non sprinting' sports learn how to be effective and control their bodies movement

in football for example, athletes need to have feet close to the ground at all times to be able..

Stu (I'm going to call im Stu now) followed up with this:

I just think he is missing the point. He is absolutely correct in that mechanics are important. But, track athletes are not the same as field or court sport athletes. speedtweet3 So here is where Stuart and I are going in different directions. My thought process deals with effort. When do athletes learn who to produce the maximal force they are capable of. Realizing that athletes have a difficult time with producing this force, I have never been in a situation where I could ask the athletes not to sprint at full-speed. Sprint full speed with technique deficiency is similar to lifting maximally with poor form, as Matt DeLancey who is an outstanding coach echoes. But, it's not exactly the same and hard to compare. A maximal load in the weight room is a load in which the athlete may have never attempted before. Maximal sprinting is a task that all athletes are required to do for success in their sport. Although the loads are much greater in sprinting when velocity and force are considered, the skill is much more familiar.  I  may be way off, but that is my experience. When in doubt, increase Posterior chain strength and increase mobility and flexibility in the anterior chain. Here is something I wrote a while back based on DeFranco's and Rooney's thoughts on strength training for speed.

MECHANICS
Not going to go into detail about how we used to teach linear speed mechanics, but address each component. These are mostly single joint exercises.
Posture
1.) Blast Strap™Abdominal Fall Outs
2.) Ankle Mobility/ Anterior Tibialis

Arm Action
*don't do hammer curls for this. You should be teaching to throw the hands back
1.) Rows 
2.) Face-Pulls
3.) Tricep Push-downs

Leg Action
Front-Side Mechanics (Triple Flexion)
1.) Hanging Leg Raises
2.) Seated Band Curls
3.) Anterior Tibialis

Backside Mechanics (Triple Extension)
1.) Hip Thrusters
2.) Band TKEs
3.) Calf Raises

LINEAR SPEED ACCELERATION (THE START)
Specifically the first 3 steps of acceleration. Included will be a different modalities for each exercise.

Ballistic
1.) Med Ball Throws for Height 
2.) Kneeling Jump (SL or DL)

Olympic
1.) Power Snatch from Blocks
2.) Power Clean from Floor 

Dynamic
1.) Box Squat with Bands 
2.) Speed pulls with Bands from Deficit 

Max Effort
1.) Conventional Deadlift

LINEAR SPEED (TOP-END SPEED)

Ballistic
1.) SL Sprints
2.) Depth Jump
3.) Stair Bounds 

Dynamic
1.) Glute Ham Raise
*This is the number one exercise overall for speed development along with squats and deadlifts.

LATERAL SPEED
These exercises would benefit the deceleration, amortization, and acceleration phases.

Ballistic
1.) Skater Jumps
2.) Shuffle with Rotational MB Throw
3.) SL Lateral Box Jumps

Olympic
1.) Snatch Balance
2.) KB Swings

Dynamic
1.) Box Squat with Bands 
2.) Sumo pulls with Chains

Max Effort
1.) Squat
*When in doubt, do these.

Regardless, Matt DeLancey is dead-on. It still comes down to the coaching. McMillan responded with a couple of statements that I really disagree with.

it is this type of thinking that sees incidence of hamstring injury continue to rise in team sports. - Stuart McMillan Hamstring injuries high IF Sprints programmed incorrectly or athletes strength levels are insufficient to fix mech - Mark Watts speedtweet4

Basically, my biggest question for every speed guru anywhere and everywhere is 'HOW are you fixing mechanics?' Is it just by cueing, specialized mechanic drills, what? Now, I want everyone to know that just because I don't agree with Stuart McMillan or other coaches who a share his views means that I don't respect his views. It also doesn't mean that I am right. What I have concluded is that we are coming from different backgrounds and the athletes we have trained are vastly different. Context as much as content.


 

Long-Term Athlete Development

I could go on with screenshots, and embedded tweets. There are over 300 responses and interactions on this thread. I even heard that the LTAD model is a total bullocks.  I didn't know what a bullocks was, but I disagree and feel the Long-Term Athlete Development Model is an adequate guideline for coaches in terms of coaching in those windows. See, this is where I fee a lot of coaches got this minor detail wrong. LTAD model in terms of developmental windows doesn't mean you don't continually coaches youth athletes on proper mechanics. It simple means that there are periods in the athletes development in which they are more receptive to those adaptations. Sprinting is a skill and should be done all the time. elitefts ltad outline Apparently, there are coaches out there who don't believe in the model but have never referred to another model which is more appropriate. Later on, I was included in a response from Rhodri Lloyd about some research they had done on maturation and youth training and those windows of opportunities. From the study, it seems there aren't windows where training i necessarily missed, but that is more suited for certain types of training which builds off of previous phases.  

Developing Speed Throughout Childhood and Adolescence: The Role of Growth, Maturation and Training

elitefts Charlie Francis Right or wrong, it what I believe. Not because Charlie said it or I've heard hundreds of coaches echo it; but because it matched up to the anecdotal data I have collected over 15 years of coaching. The training drives the data, the data should drive the training.  Some highlights of the twitter conversation included three individuals I look up to in the field.  Nick Winkleman, Derrick Hansen, and Rhodri Lloyd. It was refreshing to see I was at least on the write track.  Winkleman had made some great points and alluded to the fact there are strong, healthy athletes with inefficient mechanics. Yes, there are athletes that are fast in spite of their mechanics.  I've seen coach Tom Shaw present on speed training and the man who trained Dion Sanders and Chris Johnson had admitted to working diligently with Johnson's arm mechanics. When it was time for Johnson to run at the combine, he reverted back to the same cross-body arm action and ran one of the fastest times in combine history.  I still believe with the athlete that most of us work with the the time we have allotted, strength training will give more band for your buck. Especially, when most of my athletes never ran more than 40 yards in a straight line and often had a stick in their hand.  Here is a tweet from Hansen that made my day.

Hansen wrote a chapter in High-Performance Training for Sports entitled Successfully Translating Strength Into Speed. 

To follow up on this thinking, here is a link  to a research review from Ryan Colquhoun comparing max strength and running speed.

Read the entire article here:

http://thestrengthcave.com/research-review-comparing-max-squat-and-sprint-times/

Basically, Colquhoun summarized the finding as:

Conclusions

There are 2 main points to this paper:

  1. Relative Strength = Acceleration

  2. Absolute Strength = Sprinting

I may have thought the opposite, initially. The study is more comparing strength levels as opposed to speed development correlating to strength gains.

Finally, I got to see Boo Schexnayder present at the NSCA National Conference in Orlando last week. I have heard great things about Coach Schexnayder from Carl Valle amoung others. Bryan Mann raved about his first presentation, so I know I had to attend to the second.  Hats off to Scott Caulfield again for an unbelievable line-up.

A few things that go my attention from Boo's presentation.

What Schexnayder means is, we as coaches after pre-determined how difficult a workout is based on perception of the coach, or even worse, the perception of the perception of the athlete. We as coaches need to determine the intensity of a training session less on how people feel it was (or will be) and base it off the physiological stress that is happening as a result of the training.  Another quote I had to tweet from Boo was:

This brings me to the last point and circles back to my original tweet. Let's try replacing the word maximal speed with "full-speed" as in full-effort. This is what I failed to say in 140 characters. If you are not fully recovered before you sprint, because of too much volume or too little rest time, you are conditioning, not developing speed. And before you counter with "you have to be fast when you're tired" cliche'; really think about how you can go about training for that.

This is the chart we used, but as Joe Kenn says, "I reserve the right to be wrong."

Determining rest intervals can be as simple as understanding the applicable work to rest ratio. We have adapted a formula from Charlie Francis for non-track athletes. Normally, at least 30 seconds of rest for each second a sprint lasts. For example, if an athlete is sprinting a 40 yard dash in approximately 5 seconds; that rest interval should be about two and a half minutes. Total volume should usually be about 200-300 yards for all combined sprints. Here is an example for a typical session:

Sprint Volume

Specific Volume can be adjusted by position or in an auto-regulatory fashion. One idea that I learned from Martin Rooney was to base the volume of sprints on performance. This concept would provide a "cut-off" point on sprints once the athlete's time becomes slower.


Conclusion

At West Point, I was in charge of Sprint Football. A team team that were my last three predecessors' nightmare, became one of my most loyal and hard working teams. We had a 6,000 square foot weight room with no platforms, bumpers, ploy-boxes, or access to a track. For 6-8 weeks we squatted, pulled, pressed, rowed, and performed glute-ham raises. When the same coaches tested the players that spring as the spring before, we averaged about a 2-3 tenth improvement. We got faster without running. Would we have improved speed more if they were able to sprint in conjunction with strength training? I believe so. But, its hard to convince me that the ability to produce force doesn't have carryover.

My last year at Denison, we had a direct correlation between squat maxes in terms of bodyweight and 40 yard dash times. The 40s were tested electronically and we would simple divide the estimated max (2-4 reps converted by the Lander formula) by the bodyweight. Now, maybe our skilled guys weren't as fast as they should be and maybe we should have been faster, but it was right there in front of us.

Now I will be the first to admit, that with other sports like Lacrosse, that correlation wasn't there. What we did find was that there was a correlation (statistically significant or not) between vertical jump and 40 yard dash time. What we also figured out was any of the fastest players with good 40 or vert scores and had an average or below 5-10-5 pro agility, also had a discrepancy in the squat. I firmly believe that strength has a much great effect on lateral speed than linear, but that is another article.

When it is all said and done, with the time I have allotted to train speed with field or court athletes (sometime less than an hour per week) and the amount of coaches and space I have at my disposal; I am going to follow these principles.

1. Get the athlete at strong as possible specifically in the posterior chain.

2. maintain appropriate body composition to improve relative body strength

3. Improve mobility and dynamic flexibility in the anterior chain

4. Continue to reinforce proper mechanics in conjuction with movement prep.

5. Require the athletes to competitively sprint at full-speed with adequate rest times and appropriate volumes.

The biggest questions I have for coaches who emphasise mechanics over physical qualities are:

1. How do you know your mechanics drills are having a carryover when the athlete is running full speed?

2. Will the athletes revert back to older habits in a competitive setting?

3. Are the drills you are implementing not addressing the physical qualities of improving speed other that motor skills i.e. strength, etc.?

At the end of the day, I will get my athletes stronger, more mobile, keep them lean, and coach the shit out of everything. So, what really are we talking about?

If there wasn't an audience, would there be less ego?


References

1. Bailey R, Collins D, Ford P, MacNamara A, Toms M, Pearce G. Participant Development in Leeds, United Kingdom:Sport: An Academic Review. Sports Coach UK, 2010. pp. 1–134.

2. Balyi I. Long-term athlete development: The system and solutions. Faster, Higher, Stronger 14: 6–9, 2002.

3. Balyi I, Hamilton A. Long-Term Athlete Development: Trainability in Childhood and Adolescence, Windows of Opportunity, Optimal Trainability. Victoria, Canada: National Coaching Institute British Columbia and Advanced Training and Performance Ltd, 2004.

4. Behringer M, Vom Heede A, Matthews M, Mester J. Effects of strength training on motor performance skills in children and adolescents: A meta-analysis. Pediatr Exerc Sci 23: 186–206, 2011.

5. Beunen G, Malina RM. Growth and physical performance relative to the timing of the adolescent spurt. Exerc Sport Sci Rev 16: 503–540, 1988.

6. Borms J. The child and exercise: An overview. J Sports Sci 4: 3–20, 1986.

7. Chelly SM, Denis C. Leg power and hopping stiffness: Relationship with sprint running performance. Med Sci Sports Exerc 33: 326–333, 2001.

8. Christou M, Smilios I, Sotiropoulos K, Volaklis K, Pilianidis T, Tokmakidis SP. Effects of resistancetraining on the physical capacities of adolescent soccer players. J Strength Cond Res 20: 783–791, 2006.

9. Coutts AJ, Murphy AJ, Dascombe BJ. Effect of direct supervision of a strength coach on measures of muscular strength and power in young rugby league players. J Strength Cond Res 18: 316–323, 2004.

10. Cowley V, Hamlin MJ, Grimley M, Hargreaves JM, Price C. Children's fundamental movement skills: Are our children ready to play? Br J Sports Med 44: i11–i12, 2010.

11. Cronin JB, Hansen KT. Strength and power predictors of sports speed. J Strength Cond Res 19: 349–357, 2005.

12. Farley CT, Gonzalez O. Leg stiffness and stride frequency in human running. J Biomech 29: 181–186, 1996.

13. Ford P, De Ste Croix M, Lloyd R, Meyers R, Moosavi M, Oliver J, Till K, Williams C. The long-term athlete development model: Physiological evidence and application. J Sports Sci 29: 389–402, 2011.

14. Gallahue D, Donnelly F. Development of Physical Education for All Children (4th ed). Champaign, IL: Human Kinetics, 2003.

15. Goodwin J. Maximum velocity is when we can no longer accelerate: Using biomechanics to informspeed development. Professional Strength Cond 21: 3–9, 2011.

16. Gravina L, Gil SM, Ruiz F, Zubero J, Gil J, Irazusta J. Anthropometric and physiological differences between first team and reserve soccer players aged 10-14 years at the beginning and end of the season. J Strength Cond Res 22: 1308–1314, 2008.

17. Hetzler RK, DeRenne C, Buxton BP, Ho KW, Chai DX, Seichi G. Effects of 12 weeks of strengthtraining on anaerobic power in prepubescent male athletes. J Strength Cond Res 11: 174–181, 1997.

18. Jeffreys I. Gamespeed: Movement Training for Superior Sports Performance. Monterey, Canada: Coaches Choice, 2009.

19. Johnson BA, Salzberg CL, Stevenson DA. A systematic review: Plyometric training programs for young children. J Strength Cond Res 25: 2623–2633, 2011.

20. Katch VL. Physical conditioning of children. J Adolesc Health Care 3: 241–246, 1983.

21. Kilding AE, Tunstall H, Kuzmic D. Suitability of FIFA's “The 11” training programm for young football players—Impact on physical performance. J Sports Sci Med 7: 320–326, 2008.

22. Kotzamanidis C. Effect of plyometric training on running performance and vertical jumping in prepubertal boys. J Strength Cond Res 20: 441–445, 2006.

23. Kumagai K, Abe T, Brechue WF, Ryushi T, Takano S, Mizuno M. Sprint performance is related to muscle fascicle length in male 100-m sprinters. J Appl Physiol 88: 811–816, 2000.

24. Lloyd RS, Meyers RW, Oliver JL. The natural development and trainability of plyometric ability during childhood. Strength Cond J 33: 23–32, 2011.

25. Lloyd RS, Oliver JL. The Youth Physical Development Model: A new approach to long-term athletic development. Strength Conditioning J 34: 61–72, 2012.

26. Lloyd RS, Oliver JL, Hughes MG, Williams CA. Age-related differences in the neural regulation of stretch-shortening cycle activities in male youths during maximal and sub-maximal hopping. J Electromyogr Kinesiol 22: 37–43, 2012.

27. Lloyd RS, Oliver JL, Meyers RW, Stone MH. Lond-term athletic development and its application to youth weightlifting. Strength Conditioning J 34: 55–66, 2012.

28. Lockie RG, Murphy AJ, Knight TJ, Janse de Jonge XA. Factors that differentiate acceleration ability in field sport athletes. J Strength Cond Res 25: 2704–2714, 2011.

29. Malina RM, Bouchard C, Bar-Or O. GrowthMaturation and Physical Activity. Champaign, IL: Human Kinetics, 2004.

30. Meylan C, Malatesta D. Effects of in-season plyometric training within soccer practice on explosive actions of young players. J Strength Cond Res 23: 2605–2613, 2009.

31. Oliver JL, Meyers RW, Lloyd RS, Rumpf M, McMaster DT. Enhancing Power and Speed in Youth: New Insights: International Convention of Science, Education and Medicine in Sport, Glasgow, Scotland, 19 – 24th July, 2012. Routledge Online Studies, 64–65, 2012. Available athttp://www.routledgeonlinestudies.com/images/docs/ICSEMIS%20abstract%20merge.pdf. Accessed May 7, 2013.

32. Papaiakovou G, Giannakos A, Michailidis C, Patikas D, Bassa E, Kalopisis V, Anthrakidis N, Kotzamanidis C. The effect of chronological age and gender on the development of sprint performance during childhood and puberty. J Strength Cond Res 23: 2568–2573, 2009.

33. Philippaerts RM, Vaeyens R, Janssens M, Van Renterghem B, Matthys D, Craen R, Bourgois J, Vrijens J, Beunen G, Malina RM. The relationship between peak height velocity and physical performance in youth soccer players. J Sports Sci 24: 221–230, 2006.

34. Pyne DB, Gardner AS, Sheehan K, Hopkins WG. Fitness testing and career progression in AFL football. J Sci Med Sport 8: 321–332, 2005.

35. Reilly T, Williams AM, Nevill A, Franks A. A multidisciplinary approach to talent identification in soccer. J Sports Sci 18: 695–702, 2000.

36. Ronnestad BR, Kvamme NH, Sunde A, Raastad T. Short-term effects of strength and plyometrictraining on sprint and jump performance in professional soccer players. J Strength Cond Res 22: 773–780, 2008.

37. Rumpf MC, Cronin JB, Oliver JL, Hughes M. Assessing youth sprint ability-methodological issues, reliability and performance data. Pediatr Exerc Sci 23: 442–467, 2011.

38. Rumpf MC, Cronin JB, Pinder SD, Oliver J, Hughes M. Effect of different training methods on running sprint times in male youth. Pediatr Exerc Sci 24: 170–186, 2012.

39. Salo AI, Bezodis IN, Batterham AM, Kerwin DG. Elite sprinting: are athletes individually step-frequency or step-length reliant? Med Sci Sports Exerc 43: 1055–1062, 2011.

40. Schepens B, Willems PA, Cavagna GA. The mechanics of running in children. J Physiol 509(Pt 3): 927–940, 1998.

41. Scott JP. Critical periods in organizational process. In: Human Growth: A Comprehensive Treatise Volume 1, Developmental Biology, Prenatal Growth. Faulkner F, Tanner JM, eds. New York, NY: Plenum Press, 1986. pp. 181–196.

42. Stratton G, McWhannell N, Foweather L, Henaghan J, Graves L, Ridgers ND, Hepples J. The A-Class Project Research Findings: Executive Summary. Liverpool, UK: Sportslinx, 2009.

43. van Beurden E, Zask A, Barnett LM, Dietrich UC. Fundamental movement skills–how do primary school children perform? The ‘Move it Groove it’ program in rural Australia. J Sci Med Sport 5: 244–252, 2002.

44. Venturelli M, Bishop D, Pettene L. Sprint training in preadolescent soccer players. Int J Sports Physiol Perform 3: 558–562, 2008.

45. Viru A, Loko J, Harrow M, Volver A, Laaneots L, Viru M. Critical periods in the development of performance capacity during childhood and adolescence. Europeam J Physical Education 4: 75–119, 1999.

46. Weyand PG, Sternlight DB, Bellizzi MJ, Wright S. Faster top running speeds are achieved with greater ground forces not more rapid leg movements. J Appl Physiol 89: 1991–1999, 2000.

47. Whithall J. Development of locomotor co-ordination and control in children. In: Development of Movement Co-ordination in Children. Savelsberg GJP, Davids K, Van Der Kamp J, eds. London, UK: Routledge, 2003. pp. 251–270.

48. Williams CA, Oliver JL, Faulkner J. Seasonal monitoring of sprint and jump performance in a soccer youth academy. Int J Sports Physiol Perform 6: 264–275, 2011.

  1. Baker, D and Nance, S. The Relationship between Running Speed and Measures of Strength and Power in Professional Rugby League Players. J Strength Cond Res 13: 230-235, 1999.
  2. McBride, JM et al. Relationship between Maximal Squat Strength and Five, Ten, and Forty Yard Sprint Times. J Strength Cond Res 23:1633-1636, 2009.
  3. Wisloff, U et al. Strong Correlation of Maximal Squat Strength with Sprint Performance and Vertical Jump Height in Elite Soccer Players. Br J Sport Med 38:285-288, 2004.
  4. Hunter, JP et al. Relationshipns between Ground Reaction Force Impulse and Kinematics of Sprint-Running Acceleration. J Appl Biomechanics 21; 31-43, 2005.
  5. Weyand, PG et al. Faster Top Running Speeds are achieved With Greater Ground Forces not More Rapid Leg Movements. J Appl Physiology 89: 1991-1999, 2000.
  6. Weyand, PG et al. Sprint Performance Duration Relationships are set by the Fractional Duration of External Force Application. Am J Physiol 290: R758-R765, 2006.
  7. Wright, S and Weyand, PG. The Application of Ground Force Explains the Energetic Cost of Running Backward and Forward. J Exp Biol 204: 1805-1815, 2001.

 


TRAINING

THURSDAY AM

Fat Bar Bench Press

225 x 10, 8, 6

supersetted with...

Kettlebell Swing

53 x 10, 8, 6

THURSDAY PM

1x20 circuit

Tsunami Bar Pull-down

Hammer low Row

machine rear delt

mahcine lateral raise

Calf/ Trap circuit

Machine Bis/ Tris