Forget planks — this 12-minute dumbbell dead bug workout obliterated my ab muscles and helped sculpt and strengthen my core

Functional exercise is the key to strength, power and muscle as you get older, just ask the science

The 5 exercises to add to your routine

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

Here's how to do it

These 3 exercises target your deep core muscles to build strength and stability