Crankin, I know you are strong and athletic, and this is not aimed at you. I wish you the very best in figuring this out.

But for those of you who need another reason to work on your core (besides being more comfy on a bike and looking great when you go to Rio in February), it's so important for balance. So many people--men and women--have falls largely because they don't have the core strength and balance to hold themselves up.

Pilates, yoga, tai-chi, hiking, rock-climbing, gym rat--pick one or many and get going!