I’m back with day 2 of my 30 day fitness challenge, sharing both my morning cardio and evening leg workout. I start with black coffee and a greens drink, then hit the treadmill. At night I’m back for ...

Add Yahoo as a preferred source to see more of our stories on Google. Considering a new fitness challenge? Experts say there are benefits — but it's not for everyone. (Getty Creative) If you’re not a ...