If you're too busy for the gym or just prefer to work out at home where space is limited, getting in a good arm workout [1] can seem nearly impossible. Where's a full rack of weights when you need one? Fortunately, there are other ways to strengthen and tone your arms [2], all within the comfort of your home. Whether you're a beginner or someone who's been working out for a while, YouTube has a variety of workouts guaranteed to work for you. The arm workouts you'll find here range from equipment-free routines to dumbbell exercises — and at just 20 minutes long, they'll ensure you can feel the burn even when your schedule is packed [3]. Keep reading to find your next workout!