With 7.6 million views on YouTube and the claim it’s the hardest abs workout ever in the title, I had to give this 9-minute workout a go, and it was a stern challenge for my core.

“Your lower ab muscles are for sure the hardest muscles to target in your core work,” says Javi Perez, a Miami and New York City-based fitness trainer (whose Instagram Live workouts are always ...

Achieving six-pack abs requires a combination of targeted abdominal exercises, full-body strength training, cardio, and a ...

If you're short on time there are 10-minute ab workouts and if you're super advanced, and if you want to be pushed, ... train with Mr. Universe or try the 41 hardest ab exercises routine.

To do this, lie on your back, bend your knees and place your feet on the floor. Gently press your lower back into the ground and tuck your pelvis toward your spine. As you draw your belly button ...