Exercises like the plank train the body’s full core—the network of muscles that protect the spine, support balance, and keep you moving strong for life.
2025-11-06 1082词 困难
“When training in that manner, you isolate a very small proportion of muscles in the core,” Yamuder says. He adds there are 35 muscles in your abdomen, and the rectus abdominis—the muscle that runs down the front of the abdomen, commonly referred to as your “six-pack”—only consists of two of them.
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