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What is better for burning fat without muscle loss: Intense cardio for 20 minutes or more relaxed cardio for 30 minutes?
I typically do 30 minutes of cardio with a heartrate of 145-150. If I step it up the intensity will it cause me to lose more muscle?
I typically do 30 minutes of cardio with a heartrate of 145-150. If I step it up the intensity will it cause me to lose more muscle?