6 Indoor Cardio Workouts to Get You Through Winter.

1. Treadmill Intervals: Treadmill workouts are a great way to get your heart rate up without having to brave the cold. And by adding in some speed intervals, you can really give your cardio a boost. 2. Jump Rope: Jumping rope is a great calorie-burning workout, and it’s also a lot of fun. If you don’t have a rope, you can even use a piece of clothesline or an old shoelace. 3. Stair Climber: If you have access to a stair climber machine, take advantage of it! Stair climbing is a great cardio workout, and it’s low impact so it’s easy on your joints. 4. Elliptical: The elliptical is another great option for a low-impact cardio workout. It’s easy on your joints and you can adjust the intensity to make it as challenging as you want. 5. Spin Class: Spin class is a great way to get in a high-intensity cardio workout without having to go outside in the cold. And bonus, it’s usually pretty fun, too! 6. Swimming: Swimming is an excellent form of cardio exercise, and it’s also great for your muscles and joints. If you don’t have access to a pool, you can try a water aerobics class at your local gym.