by chip •
Leg training tip: Warm up both the quads and hamstrings, even on workouts where you are training only one. Quads and hams are antagonist/opposing muscle groups. For the quads to fully contract, the hamstrings have to fully extend (and vice versa). Sometimes, that feeling of not being able to get a good squeeze or tight feeling in the quads, may be because the hamstrings are not warmed up and not able to fully extend (and vice versa, of course).