How to Master Double Unders

Iron Jungle CrossFit • July 1, 2026

Double unders are a dynamic and challenging jump rope exercise that can take your fitness routine to new heights. It's a fantastic way to improve cardiovascular fitness, coordination, and agility while burning a significant number of calories. Whether you're a seasoned athlete or a beginner, this ultimate guide will help you master the art of double unders.

What Are Double Unders?
   Double Unders ("dubs") are when you spin the jump rope twice for every one jump. The speed of the jump remains the same, but the speed of the jump rope is quicker. They can improve your cardiovascular fitness, are efficient at calorie burning, and can add an extra challenge to your regular jump rope workouts.

Choosing the Right Jump Rope
   The "right" jump rope can be a personal preference. One consideration is making sure it is the correct length for your height. A jump rope that is too long will be sloppy and not swing as fast. One which is too short will hit you in the head! A just right length will barely touch the ground every time it passes under your feet. One way to measure is to stand on the jump rope with your feet together and hold the handles along the side of your body. The handles should come to chest height. As well, you want it to be about 4-8 inches over your head as you jump. You can find this out by asking a friend to watch you or jumping rope while in front of a mirror.
   When you are first starting, a heavier rope allows for more feedback so you can "feel" where the rope is while you are jumping. As you get more proficient, a lighter jump rope with ball bearing handles will help with speed.

The Single Under Foundation
   Mastering single unders first is crucial. It is important to start with the basics. Jump on the balls of your feet, and make sure you are only jumping once per rope swing. No double jumps! Try not to bend your knees excessively. Your jump should be light. Start slowly and progress up.

Hand and Wrist Position
   Keep your elbows close to your body, with your hands close to your hips and slightly in front of your body. This will reduce the distance the rope needs to travel, making your jumps more efficient. The wider your arms get, the shorter the rope will get, and it will make you more likely to trip up.

Timing and Rhythm
   One progression to understand the timing is penguin jumps. Leave your jump rope to the side and practice jumping on the balls of your feet while tapping the side of your thighs with your hands twice at the top of the jump. Jump - tap tap. Make sure your hands are hitting your thighs when you are in the air and your feet are not touching the ground.

Double Under Progressions
   As stated, start with mastering single unders. Once you have those down, you can move to the penguin jumps described above. Next, you can try big single unders: big, slow single unders while making sure not to bend your knees too much and still landing on the balls of your feet. From there, try one double under. Keep the slow, big jump; keep your elbows in and your hands slightly in front of your body, but try to spin the jump rope twice for one jump. Then, try performing single, single, double and connecting your jumps in that pattern. Lastly, try for a few double unders in a row. No need to try for 10 ore more right away! Even two in a row is progress.

Common Challenges and Solutions
   The most common issue is trying to use your arms too much to spin the rope. It is more of a wrist flick. Another common issue is jumping too high and bending your knees. This is more likely to tire you out faster and is very inefficient.

Remember, double unders are a skill. The best way to get better at them is to practice! If this is your goal, take 5-10 minutes 3 days a week and do some focused practice. Consistency will get you there!

Mastering double unders is a rewarding journey that requires practice, patience, and dedication. With the tips and techniques outlined in this ultimate guide, you'll be well on your way to becoming a double under pro. Remember, consistency is key, so keep practicing and enjoy the many benefits this challenging exercise has to offer. Whether you're looking to enhance your fitness routine or compete in jump rope events, double unders are a skill worth mastering. Happy jumping! 

Are you interested in getting some help with your fitness routine? Book your free No Sweat Intro to meet with a coach here.

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