We also know that the plank is one of the more effective exercises for strengthening the core muscles. One of the most popular is the plank, an exercise where you contract your core muscles, yet your muscles don’t change position. However, you’re probably familiar with isometric exercises. It’s true that most weight training programs focus on isotonic movements rather than isometric ones and for good reason. You may have heard that isometric exercises are not as effective for building strength as isotonic training, where you move a muscle through its full range of motion.
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