You don't need heavy weights — here's a 5-move ab workout using a yoga block instead

Five moves and 20 minutes are all you need to improve core strength at home without weights. Sure, lifting heavy in the gym ...

Forget heavy weights — try this 5-move ab workout with a yoga block instead

You don't need planks to strengthen your core ...
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8 Examples of Isometric Exercises for Static Strength Training

Isometric exercises like wall sits, planks, and glute bridges hold the body in one position for a set period of time. Muscles are contracted and engaged, but they don’t lengthen during the exercise.