
Originally Posted by
MFT81
OMG, dude your post is confusing as fck.
1. Lets get it straight,
When your heart rate approaches 80% of max (220-age) It dosent nessecarily burn muscle, Actually what happens is that your primary fuel source is glycogen (Stored Carbs) with a small percentage coming from stored fat.
When your heart rate stays in the 65-75 % (I Use 170-age for fat burning heart rate) range your primary fuel source is fat but a small % comes from glycogen as well.
You basically answeared your own question but came to the wrong conclusion.
a treadmill or eliptical dosent give a shit about what fuel source you used to exercise, it just gives you an idea based on weight and age how many CALORIES (and we know cals come from fat pro carbs) you burned.
Your were in a pretty close range 75% vs 80% from both stand points its just that one workout was 30mins and one was an hour. so of course you burned more CALORIES at an hour (But not nessecarily muscle) cause you worked out longer.
So what is best, why do we recommend the lower intensity to burn fat, Well for the most part we are concered with how much muscle we have, we dont want to risk burning it up. so we stick with a lower intensity at longer times.
Therefore we can emphasize burning fat with a minumum amount of glycogen and hopefully no muscle tissue.
a lot of other factors come into play, this hopefully explains the general idea,
Hopefully........