When Chris Johnson works out with coach Tom Shaw, he doesn't "lift like a musclehead," says the NFL training guru. Instead, the record-breaker's regimen focuses on building explosiveness and speed. Here's a snapshot of C.J.'s eight-week off-season program.

1 JAMMER

SETS: 2 (3 sets by end of offseason) REPS: 6-8

If a defender tries to tackle Chris up high, he can just stiff arm and push him off," Shaw says. The jammer simulates this move.