Doing steady, moderate workouts might boost your heart and lung fitness more than super intense but short sprints, even though the moderate workouts take longer.

Short, intense bursts of exercise (like sprinting) can boost heart and lung fitness just as well as longer, steady workouts — and take way less time.

Doing short bursts of intense exercise might boost heart fitness more than steady, moderate workouts for people with heart disease — on average by a small but measurable amount.

If you're trying to lower your bottom blood pressure number, going for a steady, moderate workout might work better than doing short, intense sprints — especially if those sprints last 30 seconds or more.

Both short, intense sprints and steady, moderate workouts boost teenage boys' stamina just as much after six weeks — either way, their bodies get better at using oxygen.

In adults with overweight or obesity, aerobic exercise and combined exercise programs improve cardiorespiratory fitness, measured as VO2peak, with aerobic exercise leading to the greatest gains; resistance training alone has little effect on this measure.