Does HIIT burn muscle?

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    Smile Does HIIT burn muscle?


    Members,

    The general concensus seems to be that HIIT is an exellent way to burn fat in a cutting phase. But does HIIT cardio training burn more muscle that a steady 60 to 70% BPM? Currently, I am using a variation of HIIT for 1 hour in the morning and 1 hour in the evening. I do 9 min @ 65% and 1 min maxed out @ 95 to 98%. then repeat. It seems like my heart rate stays above 70%, 30 minutes out of the hour. In an aggressive fat cutting phase, I'm losing on average 3 lbs of fat per week, but I am also losing about .5 lbs of muscle. Please assume diet and weight training to be dialed in. Maybe slow and steady would protect more muscle?
    Your thoughts are appreciated as always!
    Thanks!
    Mike

  2. jim623
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    Quote Originally Posted by guyr62 View Post
    Members,

    The general concensus seems to be that HIIT is an exellent way to burn fat in a cutting phase. But does HIIT cardio training burn more muscle that a steady 60 to 70% BPM? Currently, I am using a variation of HIIT for 1 hour in the morning and 1 hour in the evening. I do 9 min @ 65% and 1 min maxed out @ 95 to 98%. then repeat. It seems like my heart rate stays above 70%, 30 minutes out of the hour. In an aggressive fat cutting phase, I'm losing on average 3 lbs of fat per week, but I am also losing about .5 lbs of muscle. Please assume diet and weight training to be dialed in. Maybe slow and steady would protect more muscle?
    Your thoughts are appreciated as always!
    Thanks!
    Mike
    You're going to lose muscle in any cutting phase no matter what kind of cardio you do. I do think you are doing too much per session though. I may be wrong but I'd say 30 minutes max per session.
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    If you're losing 3 lbs a week on a consistent basis, then you are in way too large of a kcal deficit.
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  4. jim623
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    Rodja, you're a no BS, straight forward guy. Let me ask you this, do you think HIIT is over rated?
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    Quote Originally Posted by jim623 View Post
    Rodja, you're a no BS, straight forward guy. Let me ask you this, do you think HIIT is over rated?
    No, but it is far too over-valued for its efficacy in fat loss. In true cuts, the CNS if often very fatigued and HIIT can exacerbate this. IMO, HIIT should be treated like any other training session with appropriate pre and post nutrition. HIIT can have wonderful effects on body composition if supported by the proper environment.
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    Thanks Guys!
    I need to back the cardio off a bit, up the calories a few hundred per day. Probably a 2 pound loss per week will better preserve the muscle. It's just that I want that 12% fast lol!

    Thanks!
    Mike
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    sip on some aminos during your HIIT also if you're worried about muscle loss
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    Quote Originally Posted by Rodja View Post
    No, but it is far too over-valued for its efficacy in fat loss. In true cuts, the CNS if often very fatigued and HIIT can exacerbate this. IMO, HIIT should be treated like any other training session with appropriate pre and post nutrition. HIIT can have wonderful effects on body composition if supported by the proper environment.
    Well put Rodja.

    You need to feed fuel to the fire if you want it to burn hotter.
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