Posted on October 16, 2020 by Padraic GuilfoyleWomen’s Running: Build a strong core… Women’s Running@WomensRunning·15hWhile it feels like you’re working hard when you’re 70 reps into a grueling round of 100 crunches, you’re only working one set of muscles – and not ALL of your “core muscles”. Why You Don’t Need to Waste Your Time with Crunches Share this:TwitterFacebookRedditLinkedInPinterestTumblrPocketLike this:Like Loading...