You hear it all the time. Work out with a friend. Diet with a friend. Starting a fitness journey with someone who has the same goals as you do can amp up your results and keep you on track. My triathlon training has been more or less a solitary venture. That’s ok. I’m doing it for myself. In the last year, I’ve done most of my exercise alone, and for all practical purposes, I enjoy the solitude. However, for a summer race, a friend trained with me some, and that was fun too. Then exercise becomes a social experience and as long as you stay on track, it works. A couple of months ago, I started working out once a week with a trainer (the same friend who did the triathlon with me) and knowing that my appointment on Monday nights affects her schedule too, I make sure to...

