To perform a proper partial curl-up, lie on a flat surface with your knees bent and your feet about 30 cm from your buttocks. Extend your arms on the floor along your sides.

If you find it increasingly difficult to sit up straight, strengthen your core with a partial curl, says personal trainer Nadya Fairweather. This exercise is particularly good for working the ...

Lie on your back with your sit bones near the edge of the bed, knees bent, shoulders raised in a partial curl position. Bring your legs up, knees bent, until your thighs are pointing toward the ...

Check your form (core engaged, tailbone tucked, neck in line with the spine) and then curl the weights all the way up to shoulder height. Lower them with control. Repeat steps one through three ...