Work out timings are important

1.      

Generally any muscle gives you maximum of 45 minutes , if you burden it with more time at a stretch , the body turns to catabolic stage , which does not give the results in case of improvement of muscles exercises. It also can reap you with injury, because after this timing the muscle does not support.

This timing is a general standard , you have to find out your own capacity.

Besides, you need to take short pauses between the exercise . it backs the muscle up to recover for the next schedule.

Cardio exercises also require maximum time of 45 minutes . stretching more time will start harming your body, instead. Total 45 minutes should have variation of exercises. You should not overdo the same one exercise .