Wrist, shoulder, and foot injuries are fairly common, and one of the reasons people may avoid planks when they exercise. There are modifications you can take so you don't risk further pain or damage to your joints, and one of them requires a stability ball. By placing your elbows on a ball, you're in a modified plank position, with limited strain on your upper body, focusing mostly on strengthening your core. If you have a foot or toe issue, you can modify the plank by staying on your knees, using a yoga wedge block, or placing your legs on a stability ball to take some of the pressure of your foot.
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