
Originally Posted by
Pushtoday
The amount of exercise one can do in a day depends on many different factors.
What types of exercises,? (strength training, cardio, crossfit etc..)
What is your experience level? (training for years, new to training, etc...)
How much rest between exercises? (level of intensity?)
What are the goals? Just to build muscle or increase strength, power, endurance?
Lots of factors go into how long you should exercise to build muscle fast.
Of course Diet and nutrition are key components.
As is rest and sleep.
You could build muscle exercising only 20 minutes a day, but far more than just exercise factor into building muscle.