As long as you only do 20-30 minutes of cardio at a 60% rate you won't lose muscle, or if you do hardly any. I've been doing this for 2 months now and haven't lost any strength.
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As long as you only do 20-30 minutes of cardio at a 60% rate you won't lose muscle, or if you do hardly any. I've been doing this for 2 months now and haven't lost any strength.
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