One of the biggest mistakes when someone goes to gym is that he gives up too soon. Also very bad thing is if someone does not exercise correctly, because that my cause serious injurys that is hard to cure.
The biggest mistake people do is that they start taking supplement powder from Gym coach for quick effect on their body. These supplements are very harmful. Another mistake- few people starts weight lifting this that without doing any warm up for start up.
The biggest mistake that those people going to gym are those supplement that they take everyday for enhance their body and muscle.It's not natural it has a side effect.And it can broke some relation.Why?A bigger muscle body also has tiny private parts.Hope everyone get it what i mean.Push up and jagging is more natural than going to gym everyday.