As I increase the amount of time for the back squat, it becomes more of a mental challenge than a physical one. Don't get me wrong, it is not easy physically at all (I walk ridiculously afterwards :D ).
If you want to be the best, if you want to beat the rest, dedication’s what you need. But how much is too much? There are certain warning signs, both physical and mental, which could be an indication that you are training too hard.