Note that a straight-arm plank can be modified so you're supporting yourself with your forearms rather than your hands. In addition to targeting our abs, planks activate a whole bunch of other muscles ...
If you make a few adjustments, however, you can turn the modest side plank into a surprisingly tough exercise that challenges your lower body and back. Lie on one side with your legs straight and prop ...
Sit on the floor with your knees bent and feet lifted off the ground, holding a dumbbell or kettlebell with both hands. Lean back slightly and rotate your torso to one side, bringing the dumbbell ...