Running into the ground

[melanoman]

Went running with my brother Sunday. Damn, he's faster than I am. His main racing medium is the bike, but he's still got so much better cardio that his practice pace (even slowed down to accommodate me) is faster than I can sustain. Also my energy has been lagging lately. I mostly notice it at swimming practice, when I'm gasping for air more than usual. I suspect I'm stressing enough to burn up energy I would otherwise use to exercise.