Personal trainer shares three hip flexor strengthening exercises runners can do to build strength and improve performance.

Stand with your feet hip-width apart with a slight bend in your knees holding dumbbells, or a kettlebell or barbell in front ...

Finally, far from focusing on a flat stomach, your deep core muscles work your pelvic floor and diaphragm. Your pelvic floor muscles are a group of muscles at the base of your pelvis, and ...