Crunches isolate your upper abdominals and are a highly effective way to target and tone your abs, says lapaix. β€œall movements start at your. Webcrunches can be a valuable tool in your core training toolbox β€” as long as you're doing them right.

Webtraining your core is central to any strength training routine, and crunches are a classic exercise to improve your balance and stability, and as an added bonus, get.