A lot of guys (including myself) take some BCAA's during fasted cardio as a safe guard against muscle loss. It's definitely debatable if you'll lose any muscle during fasted cardio regardless as long as you're getting sufficient calories throughout the day. But they're cheap, so why take the chance. I do a powder and sip it while on the treadmill when fasted. But as long as we're talking less than an hour total, it's not necessary to have them before and during. Just whatever's most convenient. If it were me, I would take however many pills would equal around 10 g BCAA beforehand and then eat something afterwards.





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