Forget sit-ups — it only takes 15 minutes, 5 exercises, and 1 dumbbell to build a strong core

What does drinking collagen water every day do to your body We tested it out to see what, if any, benefits exist

Grab a kettlebell and power up your core with this 12-minute workout, which will build functional strength throughout your whole body

Indoor cycling is a low-impact way to increase your training load and I found it an enjoyable and effective addition to my running during marathon training

What is a sissy squat, and what happens when you do 100 reps every day for one week Our writer found out with this squat challenge

A full-body workout you can do in the comfort of your own home — no squat racks or barbells required