HIIT for Bad Knees — How to Get an Intense Workout Without the Pain

Ever wondered why HIIT is considered so dangerous for people with knee problems? You envision a series of jump squats and burpees, with each landing causing your knees to ache. Do you have to give up HIIT altogether if you're already experiencing knee pain?

Here, it's not the "high-intensity" that hurts your knees. It's the jumping. Studies show that just 15 to 20 minutes of HIIT can match or beat 45 minutes of regular cardio for building fitness and endurance. So the real question isn't whether you can do HIIT with bad knees. It's how you do it, and that’s exactly where HIIT without jumping comes in.

As CrossFit champion Rich Froning Jr. puts it, "In training, you listen to your body." That's exactly the mindset behind this HIIT knee-friendly cardio workout. Every move keeps your heart rate up and your effort high, minus the impact that makes your knees complain. Let's get into it.

If you're completely new to HIIT, it's worth starting with a full HIIT workout plan for beginners before adapting it for your knees.

Why Bad Knees Don't Rule Out HIIT

Not all exercises have the same load on your joints. Think about running versus swimming. Every time your foot hits the ground while running, your knees absorb several times your body weight in force. Swimming does none of that. The water supports you, so your joints get a rest while your heart continues to work hard.

That's the actual difference between high impact and high intensity. High impact means your joints are stressed, usually from jumping or landing. High intensity just means you’re working hard enough to raise your heart rate. You can have one without the other.

So what actually stresses bad knees? Jumping. Landing hard. Deep squats or lunges where your knees carry your full body weight at an awkward angle. Fast twisting movements. What doesn't stress them nearly as much? Controlled movements at a steady tempo, single-leg stance work, and moves where your feet stay on the ground the whole time. That’s the whole idea behind the HIIT exercises for weak knees.

And what makes a true HIIT for bad knees, even without any jumping, is the interval structure itself. Short bursts of intense effort followed by short rest periods are what create the HIIT effect, not the specific exercises you choose. Swap out the jumps for intervals, and you still get the same kind of workout. In other words, it's simply no-impact interval training.

Dealing with knee pain but still want real results? Book a session and let a Brookswood trainer modify every move for your knees.

Warm Up First

Before you jump into any intense workout, your muscles need a few minutes to wake up. Skipping this step is one of the easiest ways to end up sore or hurt, knees included. Spend about 90 seconds on each of these:

1. Marching in place

Stand tall and march, swinging your arms as you go. Keep a steady, moderate pace. Add light hand weights if you want a bit more of a challenge.

2. Knee lifts

Similar to marching, but bigger and a little slower. Stand up straight, brace your core, and lift your knees as if you're stepping onto a stair. Alternate legs and let your arms move naturally.

3. Heel taps

Stand with your knees slightly bent and feet shoulder-width apart. Tap one heel out in front of you while raising your straight arms to shoulder height. Switch sides and repeat.

4. Side-step touch

Stand with your feet together. Step one foot out wide, then bring the other foot in to meet it. As you step, move your arms out to the sides in a reverse-fly motion. Repeat on the other side.

By the time you finish these four, your heart rate should already be up and your muscles ready for the real work ahead.

Form Cues for Knee Safety

A few small adjustments can make a big difference in how your knees feel during and after any HIIT for bad knees workout.

1. Point your knee toward your second toe

Whenever you bend your knee, keep it lined up with your second toe instead of letting it drift inward or outward. This one habit alone can help prevent a lot of future knee pain.

2. Don't let your knees cave in or lock out

Watch for your knees caving inward during squats or lunges. Also, avoid locking your knees straight at the top of a movement. Keep a slight bend at all times.

3. Start slow, then build speed

Learn the movement pattern first at a slow, controlled pace. Once you're confident you're doing it correctly, then pick up the speed and intensity.

4. Stop if something feels off

If you feel pain in the first few reps of any move, stop and skip that one. There's no need to push through sharp pain. Everyone's knees are different, so what works for one person might not work for you, and that's okay.

Keep these cues in mind as you move through the workout below.

The Low-Impact Workout for Knee Pains

Here's the full HIIT for bad knees workout, grouped by movement pattern, built entirely as HIIT alternatives to burpees/jump squats. Pick a format that works for your time (a 30-second work with a 15-second rest cycle is a solid place to start), and move through each group with control before speeding up.

Marching and Stepping

1. March out-and-in

Stand with feet hip-distance apart, arms bent at 90 degrees. Lead with your right foot and march your feet out wide, then back to center, pumping your arms as you go. Do a full round leading with the right leg, then switch to the left.

2. High knee lift with arm pull-down

Stand with feet hip-distance apart, arms overhead. Pull one knee up to your chest while pulling your elbows down at the same time. Return your arms overhead as you set the foot down, then switch sides.

Lateral and Stance Work

1. Stationary speed skater

Stand with feet wider than hip-width. Keep your feet planted and lean your torso to one side, bending that knee into a partial lunge while the opposite leg stays straight. Drive the opposite arm forward as you shift, then switch sides.

2. Double side step with the back row

Stand with arms extended in front of your chest. Take two steps to the left, pulling your arms back as in a row, then two steps to the right, doing the same.

3. Standing side leg lift with jumping-jack arms

Stand with feet together, arms down. Bring both arms overhead while lifting one leg out to the side, like a jumping jack without the jump. Alternate legs with each arm swing.

Squat and Lunge Alternatives

1. Partial-squat heel jack

Stand with feet together, knees slightly bent, torso tilted forward. Open your arms into a reverse fly while tapping one heel out to a 45-degree angle, then bring it back. Repeat on the other side.

2. Elevated squat thrust

Stand in front of a step or bench. Place your hands on the ground, walk your feet back into a plank position, then walk them back in and stand up, raising your arms overhead to finish the repetition.

3. Windmill step

Stand with feet together, arms angled toward one hip. Circle your arms up and overhead as you step one leg back into a curtsy behind the other. If that bothers your knees, swap it for a regular back lunge.

Upper Body and Core

1. Inchworm push-up

Stand with feet hip-width apart. Bend at the waist, place your hands on the floor, and walk them out to a plank. Do a push-up, then walk your hands back to your feet and stand up. Drop to your knees for the push-up if needed.

Glutes and Hamstrings

1. Repeater knee lift

Stand in a split stance with your front leg carrying most of your weight. Lean your torso forward, arms overhead, and draw your back knee up to your chest as your hands come down to tap it. Return to the starting position and repeat the exercise on one side for a full round before switching to the other leg.

2. Reverse leg lift

Stand with feet together, knees slightly bent, leaning forward slightly. Raise your arms overhead as you extend one leg straight back behind you. Return and switch legs.

Want this exact routine coached live, with real-time form checks for your knees? Join a beginner-friendly session this week.

You Don't Need to Jump to Get Results

Bad knees don't mean you have to give up on HIIT. They just mean you train a little smarter. Swap the jumps for controlled moves, keep your intervals short and sharp, and let your knees stay out of it while your heart rate does all the work. . What you're left with is a genuinely knee-safe fat burning workout that doesn't ask your joints to pay the price.

Are you looking for HIIT for bad knees that actually works with your body? Our trainers at Brookswood will guide you through moves like these and modify every exercise to suit your knees. Join a class and experience the difference for yourself.