Just completed a high-intensity 20-minute run? Congrats! Now keep going, says Sean Wells, DPT, PT, fitness expert for bistroMD. When you think you’re finished, or you’ve reached your initially determined time, add three to five more minutes. “Spend a couple extra minutes on the elliptical, or five more minutes walking,” says Wells. If you’ve gotten this far, a few more minutes are attainable, but challenging, which adds up to personal bests and records that make you feel proud. Not to mention, each little nudge gets you that much closer to your bigger goals—faster.