Okay so I was working out with a personal trainer friend and they recommended that I hold the muscle contraction for 2 seconds in the middle of each rep of calf raises and leg extensions. There is no doubt it helped build up lactic acid in my muscle and thus caused some extra muscle soreness, but does this actually DO anything for muscle growth?
I hadn't heard this before and it didn't seem to make sense to me logically (I have always read that isometric contractions=worthless), but it came from a reputable source. What do you guys think?
I hadn't heard this before and it didn't seem to make sense to me logically (I have always read that isometric contractions=worthless), but it came from a reputable source. What do you guys think?