Effort

All runs involve some effort- heck, on some days it seems strenuous just to put on running shoes and get out the door! At the same time, most of my runs do not hurt at all. Really.

But today's hill workout involved some serious effort- with arm pumping and grunting :) I think it's a sign that different muscles were being used, getting engaged, and waking up. And that can only make me stronger!