Start on all fours. Extend your right arm in front of you and your left leg behind, actively reaching in opposite directions.

The benefit of isometric exercise is that it tends to strengthen your core more than traditional isotonic exercises (when your joints are moving). Isometrics also lend to more stability and tend to ...

If you’ve ever held a plank, paused at the bottom of a squat or pressed your palms together in front of your chest, you’ve done an isometric exercise. Ta-da! These holds might look simple — after all, ...

One of them is the 3-3-3 method, popularised by coach Gary Walker. ‘The truth is, you don’t need more weight to build muscle ...