Quote:
Originally Posted by Gor Etology
The thing is you have to use a mask. Imagine doing a deadlift with 220-400 pounds on you and you just black out, or same with squats. It's very easy to black out since mask won't let you breathe or get enough oxygen.
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Just do a different workout routine that suits the circumstances.
Breathing thru a mask gives you a better workout when breathing is more difficult. The percentage of oxygen is the same either way.