My knees, hips, and ankles can get cranky at times ... where I found fitness influencer Cindy Yu’s No Jumping HIIT workout.

You thought exercise was meant to make you feel younger, but here you are with knee pain after taking up running. After all, almost half of recreational runners get injured, according to new research.

While a standard full-body, fast-paced HIIT session might not get your muscles ... your hands held in front of your chest. Bend your knees to squat down, keeping your chest up tall.

Start in a slight squat with your knees bent. Jump sideways to the right, landing on your right leg. Bring your left leg behind you, but don’t let your left foot touch the floor. Keep your chest ...

With hundreds of miles under our belts, these were the best running shoes for bad knees. Buy at Zappos.com Buy at ...

She creates safe, inclusive workout programs for everyone—including beginners and expectant or postpartum moms (and even filmed this HIIT workout ... from your knees—and gradually progress ...