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

Begin with three sets of each exercise. To build strength, Mr. Salvador recommended four to eight repetitions per set. As you become more comfortable, you can increase to four sets. Take between 90 ...

It's well established that a strong core can help with posture and back issues, and properly executed sit ups can contribute to a stronger, more stable core. "Regularly doing sit-ups or crunches can ...

Discover 4 shoulder press variations to sculpt powerful arms with expert tips from a trainer. Build strength and aesthetics!