High Knee
High knees is a fast-paced cardio exercise performed by running in place while bringing the knees up toward the chest. It boosts cardiovascular endurance, improves lower-body power, and actively engages the core.
Count your High Knee reps with AIFree in your browser — no app, no equipmentHow to Do High Knee
- Stand straight with your feet hip-width apart and your arms at your sides.
- Engage your core and quickly lift your right knee up toward your chest, aiming to get your thigh parallel to the floor.
- As you lower your right leg, immediately drive your left knee up toward your chest in a running motion.
- Pump your arms in sync with your legs, keeping your elbows bent at 90 degrees.
- Land softly on the balls of your feet and maintain a rapid, continuous rhythm.
Muscles worked
Hip flexorsQuadricepsCalvesAbs
Form tips
- Keep your chest upright and avoid leaning backward to compensate for lifting your knees.
- Land softly on the balls of your feet to minimize impact on your joints.
- Drive your arms dynamically to help generate upward momentum and maintain speed.
Common mistakes
- Leaning too far backward, which strains the lower back and reduces core engagement.
- Not lifting the knees high enough, keeping them below hip level.
- Landing heavily on flat feet or heels, which increases the risk of shin splints.
FAQ
How many reps and sets of high knees should I do?
For cardio conditioning, aim for 3 to 4 sets of 40 to 60 repetitions (counting each knee raise as one) or perform them for intervals of 30 to 45 seconds.
Can I do high knees if I have joint pain?
If you experience joint pain, modify the exercise to a low-impact high-knee march, lifting your knees high one at a time without the jumping motion.
How do high knees benefit running performance?
They strengthen the hip flexors, improve stride frequency, and reinforce proper upright running posture, making them an excellent dynamic warm-up.
