Bend your knees slightly and grip the kettlebell handle. Drive through your heels and stand tall as you squeeze your glutes.

Relatively simple yet effective exercises are often particularly popular. Step-ups definitely fall into this category, primarily training our glutes and legs. They also burn calories at the same time.

If you equate step aerobics with leg warmers and spandex, well, you’re not wrong—but you’re stuck in the 1980s version of it. As TikTok videos that have amassed millions of views show, the retro ...