Tight hip flexors, especially a deep muscle called the psoas, can silently stress your spine. Here's why this muscle deserves ...

Your journey to getting shredded doesn't involve just situps and planks. Your midsection can power so much more.

The man who made history marketing his muscles ... only to a limited degree," Todd says. "To build up muscle you need weights. But back then it was hard to make money in weights.

Examples include the plank and knee-to-chest stretches. Stretching the back muscles after completing a back-strengthening routine can help prevent muscle soreness and injury. It may also provide ...