1. Want leaner legs? - Phase 1 & Phase 2 detoxification happen during sleep, if your sleep is poor you will have higher body fat on the lower body. Also, it will be more difficult to lower stored body fat on Thighs, Hamstrings, Knee, Calves
2. Sleep deprivation can increase inflammation, which will lead to a reduction in insulin sensitivity. Which will lead to a increase in body fat over time due to insulin resistance.
3. Sleeping just one less hour can lead to a increase of hunger as much as 45% according to one study on sleep & nutrition habits.
4. Sleep is a opportunity for the body to repair itself. Most restorative functions of the body happen overnight, so poor sleep will comprise your ability to recover from your training sessions.