Why exercise is harder for ADHD

As my knees near the floor for the last time, my bones creak and all the breath in my body leaves in one exasperated gasp. The pain is debilitating and the strain is simply too much. This will be my final act, my last moment. As I reach up to my child in anguish, hoping they have a happy life without me, my child takes the toy out of my hand and my wife tells me to get up.