SPEED Squat, SPEED Bench, SPEED Deadlift!

My lower back is hurting! Why? Because my hams, hips, and abs are all exhausted and nothing is left to support my body except for my low back muscles. SS Yoke Box Squats + Onyx Heavy Bands 242 x 2 x 6 sets 332 x 2 x 2 422 x 1 512 x 1 x 2 sets Chain Suspended GM's 152 + bands x 3 x 3 242 + bands x 2 x 3 sets 332 + bands x 1 x 3 sets Speed Deads 363 lbs + 195 in chains x 1 x 6 sets Bench Press Secret Weight Releaser Bench Program! worked up in weight afterwards to 277 lbs, 110 weight releasers, double monster mini bands x 1! Finished off with lats, triceps, biceps, and abs on my SpudInc Cable Pulley System and that did me in!