Fitgurú on MSN
Still doing sit-ups? This one core exercise builds stronger abs without hurting your spine
If sit-ups leave your back sore or your results stuck, this smarter core move could change everything.
If you’re a little hazy on the difference between sit-ups vs. crunches, you’re not alone. They both strengthen your core, but the details on how they differ and the benefits of each can be confusing. ...
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