Start on elbows and knees before straightening your legs and raising your body. Keeping your head up, ensure your back is completely straight – this means no arching or sticking your bum in the air. Hold that position.

Lihasgrupp: Abdominal

Sammud

Hold it for 45 seconds. If you can do it for a minute without shaking uncontrollably, it's time to try some variations.

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