Check out the image below first.
These types of posts are all over the Internet, and itโs causing serious confusion because of how misleading it is.
Let me break it down for you:
Your body doesnโt automatically choose to burn muscle instead of fat because you get poor sleep.
Less sleep =
Poorer training performance
Higher cortisol
Lower testosterone
More hunger
Less insulin sensitivity
And these can contribute to losing less fat and more muscle, indirectly.
Sleep is just one piece. The big drivers are:
1. Calorie deficit (must be there)
2. Protein intake (~0.8โ1g/lb)
3. Resistance training
4. Sleep quality
Hope this helps! โค๏ธ๐ซก