The classic gym routine doesn’t isolate your stomach muscles as much as you might think, but here are five that will If someone in a film or TV show wants a six-pack, chances are they’ll drop to the floor and start doing sit-ups. According to Dr Lee Brown, senior lecturer in strength and conditi...
Source: [Guardian International](https://www.theguardian.com/lifeandstyle/2026/jul/27/is-it-true-that-sit-ups-best-exercise-abs)