I just did it cold and held for 60 seconds exhaled, did the two and held 30 inhaled. I feel pretty good. If you aren't in shape I could see how this would be a bad idea though.
I just did it cold and held for 60 seconds exhaled, did the two and held 30 inhaled. I feel pretty good. If you aren't in shape I could see how this would be a bad idea though.
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