Exercise is a magic pill in every sense except for losing weight. That's almost entirely controlled by your diet.

If you're exercising to lose weight, you're probably thinking that more exercise means more weight loss, which means that you could be overtraining.

I recently got a second Apple Watch to wear to bed to track my sleep, and it's given me some really great insights into when I'm hitting the red zone and need to dial back training. For exercise, more intensity is not always better. What matters is consistency, not consistently high intensity.