Diese Übungen trainieren Bauchmuskeln effektiver als Sit-ups!

If you don’t have time for extensive strength training, you’ve done “at least a few sit-ups”. The classic among bodyweight exercises has long been considered optimal for strengthening the abdominal muscles. Now he is falling into disrepute: According to experts, sit-ups are really supposed to bring absolutely nothing – except maybe back pain. FITBOOK has made smart.

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