Quote:
Originally Posted by Duik
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Regarding squats/general gyming...
Dropping slowly gives the muscle a negative contraction component. A bit like the PNF stretch mechanism. You gain on the up and the down motion.
You are at the gym for 2 hours why only workout for ½ of that time. Maybe things have changed since i learnt my skillz.
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You are describing eccentric versus concentric contraction. Consider the hamstrings in a squat. Someone correct me but In the down of a squat your hamstrings are contracting but the muscle bellies are lengthening as you reach the bottom. In a concentric contraction (the up part) the hamstrings contract but the muscle belly is shortening. There is also an isometric contraction where the muscle is contracting without an up or a down. All three are different stimuli and produce slightly different adaptations. Eccentric contraction tends to cause more soreness but like you said you gain on the up and the down. A practical upshot of knowing this is that if you are just sore as fuck but need to train something you can just do the concentric part of a movement hard as a workaround.