Nice article! I like reading Christian Finn, but it's been a while. I heard about him here on the forum because somebody posted saying something he wrote wasn't correct (I don't remember the details) and he replied here and explained how he was right.
(And he was!)
I found this part particularly interesting - I knew muscle loss was happening in fast weight loss, but I didn't know the specifics:
Quote:
The reason you lose weight more quickly when muscle is lost is because 1 pound of muscle provides roughly 800 calories, while 1 pound of fat provides around 3,500 calories [4].
Let's say that you create a daily calorie deficit of 500 calories. In other words, every day you burn 500 calories more than you get from your diet. That comes to 3,500 calories per week (500 x 7 = 3,500).
If all of those calories came from fat, you'd lose just one pound in weight. However, if all of those calories came from muscle (which is an unlikely scenario, but I'll use it just to illustrate the point), you'd lose almost four pounds in weight.
So, 100% fat loss is the equivalent of 1 pound of weight lost, while 100% muscle loss is the equivalent of 4 pounds of weight lost.
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Thanks for sharing that!