According to a recent video, Dr Israetel has shared the best possible exercise for building your core, and it’s probably not ...

If you can, place one hand on your core to feel how hard it’s working. My verdict on the reverse crunch with leg lift I was delighted with my improvement after seven days.

Cross one leg over the other, so your foot is resting on the opposite knee, as you crunch up, reach the opposite elbow to your knee, it doesn’t matter if they don’t actually touch.

Looking to work the arms, legs, glutes, and core? This effective, 30-minute full-body workout from Denise and Katie Austin needs only dumbbells and a yoga mat.

Shoot for at least 10–12 crunches, taking a small break and switching legs for your next set. Give yourself at least three sets on each extended leg.

Toe reach crunch: Also known as vertical leg crunches, start by lying on your back with your arms outstretched to the ceiling. Raise your legs together, lifting them to the ceiling, with a slight ...