I'm a personal trainer — these are the 5 best exercises you can do for your corset muscle, and no, none of them are sit-ups

Here are 5 exercises that target your 'corset muscle' ...
Fitgurú on MSN

The ageless powerhouse: Why I refuse to become a frail old lady at 71

Stop expecting a downhill slide into aches and pains—this 71-year-old yoga pioneer reveals how she reversed bone loss and built elite strength after fifty.