The viral fitness trend prioritizes healthy habit-building over step count and intensity. Here's how it worked for me.

In the second edition of our six-part cardio challenge, fitness instructors Astrid Swan and Ridge Davis walk you through butt kickers, army crawl planks, triceps dips, crab walks and more—all ...

Step-ups may look basic, but they're one of the clearest signs of how strong and efficient your body still is. This single move combines leg power, coordination, and cardiovascular endurance, all the ...