Fast hands and constant footwork make this one of the most intense full-body workouts on this list.
Boxing demands rapid punching combinations while your feet and core continuously adjust your position and generate power. Even without an opponent, shadow boxing or bag work keeps your arms, shoulders, and legs working simultaneously at a fast tempo, which drives the high MET value.
At 7.8 MET, boxing sits just behind tennis and HIIT, reflecting how much of the body stays engaged throughout a round rather than just the arms.