I am in my 40s and have a passion for sports. I play football and handball. I cycle and run. I take pride in my 'speed ego', which essentially means I enjoy being faster than anyone I know. For all this, there's a somber and inescapable fact looming over me that I'm unwilling to fully acknowledge: my sporting competitiveness and precious speed won't last forever. Yes, middle-age is engulfing me like a black hole that appeared out of nowhere. It’s pulling out my hair and slowing down my recovery times. To counter this, I have…