Picture this: a single move that not only strengthens your key leg muscles (quads, hamstrings, and glutes) but also improves your balance, coordination, and yes, gets your heart pumping like a cardio ...

How many step-ups after 55? A CPT shares the 40-rep benchmark, safe form cues, and 4 drills to level up.

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.