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What muscles does running work? Running works the quadriceps, hamstrings, gluteals, hip flexors, abs, calves, tibialis anterior and poroneal muscles. Although the exercise does not build these muscles or make them stronger, it does make them capable of greater endurance.
The greater your degree of hip extension, the more work is performed by your glutes and hamstrings--sprinting will build these muscles more than jogging. When you swing your leg forward to take another step you use your hip flexors at the front of your hip and your rectus femoris, one of the quadriceps muscles.