Take note.

I must remember this.

I was exhausted, physically, emotionally and mentally.

I went to the gym, I went hard for 15 minutes and took the rest of it easy.

I feel better, much better. Still a little sleepy, but not exhausted. My emotional reserves feel replenished.

Next time I want to back out of going to the gym because I feel tired, stressed or low, I must remember this.