In The Know: Fitness is a series of exercise videos hosted by personal trainer, Jeremy Sry, in which he demonstrates step-by-step workouts that are easy to do at home, at the gym and even on the go.

Whether you realize it or not, your quads are doing the most—every time you sit, stand, step, or sprint. These powerhouse muscles on the front of your thighs are crucial for strength, balance, and ...

Step aerobics is a classic cardio workout. It has lasted for decades for a simple reason: it delivers results. The "step" is a 4-inch to 12-inch raised platform. You step up, around, and down from the ...