Sports PT Swears by 5 Non-Squat Quad Exercises to Build Leg Strength With Bad Knees

Knee pain can quickly change how you approach leg day. After just a few uncomfortable squat sessions with nagging discomfort, you might even start to question if you should continue at all. And for many guys, their first thought is to completely back off quad work and hope the knee settles down.

The issue is that stopping completely when you don't have an actual injury usually leaves strength on the table. Even if your knees are bugging you, your quads still need training , especially if the goal is to help the knee tolerate more over time. A better approach is finding quad exercises for bad knees that let you keep building strength without repeatedly irritating the joint.

Sometimes that means shortening the range or changing the setup. Other times, a different exercise lets you load the quads without the same irritation. Either way, you can keep training while rebuilding what the knee can handle.

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Related: The Brutal Leg Workout That'll Test Your Limits (and Your Quads)

Why Deep Squats Trigger Knee Pain (and How to Identify the Driver)

Deep squats can put more stress on the knee than it's ready for, especially when depth or training volume jumps too quickly. Brandon Guastafeste, Sports PT and owner of All Around Athlete , sees this often with lifters who add deeper squatting before they've built enough tolerance.

"I don't think deep knee flexion itself is necessarily the issue. It's usually the combination of depth, load, and volume relative to what that person is currently prepared to tolerate," Guastafeste says.

Limited ankle or hip mobility can also change how you reach the bottom of a squat and shift more stress to your knee. That doesn't automatically mean you need to stop squatting, but you will need to figure out which part of the movement is causing trouble.

A simple way to narrow it down is to change one variable at a time . Reduce the load while keeping the same depth, or shorten the range while keeping the weight similar. If one change consistently makes the squat feel better, that gives you a clearer idea of what needs adjusting.

If the pain keeps hanging around despite those changes, or gets worse, it's worth having a professional evaluate your knee before you keep experimenting on your own.

The Golden Rules of "Knee-Friendly" Quad Training

A knee-friendly quad exercise is one you can load without noticeably aggravating your symptoms. What that looks like will vary from one lifter to the next, so the first step is finding a version that works for you. If deeper knee flexion is uncomfortable, start by shortening the range.

Tempo gives you another option. Slowing the lowering phase creates plenty of muscular tension with less weight, while eccentric loading can also help build tendon capacity and strength around the knee. You can make the set demanding without immediately piling on more resistance.

As you test these changes, pay attention to how the knee responds during the session and afterward. A little discomfort doesn't always mean the exercise is off-limits, but it should stay manageable and shouldn't leave the knee noticeably more irritated later.

"The goal doesn't always have to be completely pain-free exercise," Guastafeste says. "I typically want discomfort to stay mild and manageable during training and, just as importantly, not result in a significant increase in pain or symptoms afterward or the following day."

Once you find a version that feels good, progress deliberately, add a little resistance or work through more depth, then see how the knee responds before changing something else.

Related: How to Do Leg Extensions for Maximum Quad Power and Size

The 5 Best Non-Squat Quad Exercises for Bad Knees

These five movements give you different ways to keep building the quads when squatting irritates your knees. They range from simple isometric work to heavier strength training, so you can choose what your knee can handle.

How to Do Wall Sits

1. Stand with your back against a wall and your feet slightly in front of you.

2. Slide down until you reach a knee angle that feels comfortable.

3. Keep your feet flat and your back against the wall.

4. Hold the position while maintaining tension through your quads.

5. Stand up and rest before repeating.

6. Perform 3 sets of 20 to 45 seconds.

Wall sits create sustained quad tension without repeatedly moving the knee. Guastafeste also likes them when someone needs a simple way to start putting stress through the knee again after an injury; if a deeper position feels like too much, stay higher on the wall and work lower over time.

How to Do Spanish Squat Isometric Holds

1. Anchor a heavy resistance band or strap behind you at knee height.

2. Step inside the band so it sits behind both knees.

3. Walk forward until there's steady tension on the band.

4. Sit your hips back and bend your knees to a comfortable depth.

5. Keep your torso upright and hold the position.

6. Stand up slowly when the set is complete.

7. Perform 3 sets of 20 to 30 seconds.

The band lets you sit back while keeping your torso upright, which can make the position easier on the knee for some lifters. Adjust the depth until you can get a strong quad contraction without noticeably increasing your symptoms.

How to Do Leg Extensions

1. Sit in the machine with your back supported.

2. Adjust the pad so it rests just above your ankles.

3. Extend your knees until your legs are nearly straight.

4. Lower the weight under control.

5. Repeat without letting the weight stack slam between reps.

6. Perform 3 sets of 10 to 15 reps.

Leg extensions give you a straightforward way to isolate the quads and fine-tune the load . The machine also lets you work around a sensitive portion of the movement, then reintroduce it as symptoms improve.

How to Do Reverse Sled Pulls

1. Attach straps or handles to a loaded sled.

2. Face the sled and hold the straps with your arms extended.

3. Keep your torso upright and take short steps backward.

4. Push through the floor as you straighten the working leg.

5. Continue walking backward for the prescribed distance.

6. Perform 3 sets of 20 to 30 yards.

Reverse sled pulls emphasize concentric knee extension with very little eccentric loading. Guastafeste likes them because many athletes with knee pain tolerate them well, and you can increase the resistance as they get stronger.

How to Do Trap-Bar Deadlifts From Blocks

1. Set the trap bar on blocks or elevated plates.

2. Stand in the center of the bar with your feet about hip-width apart.

3. Push your hips back slightly and bend your knees enough to reach the handles.

4. Brace your torso and drive through the floor to stand tall.

5. Lower the bar back to the blocks under control.

6. Reset before the next rep.

7. Perform 3 sets of 6 to 8 reps.

Trap-bar deadlifts from blocks let you keep a heavier strength movement in the program while limiting deep knee flexion. Raise the starting position enough that you can reach the handles without dropping into more knee bend than you want that day.

Related: We Asked Trainers About the Most Underrated Leg Exercises. They Agreed on 4 Squat Variations to Build Stronger Quads

Sources

• Morri, Mattia et al. " Conservative treatment of patellofemoral pain: effectiveness of strength exercises compared to other treatments. A systematic review with meta-analysis. " BMC Sports Science, Medicine & Rehabilitation vol. 17,1 303. 17 Oct. 2025, doi:10.1186/s13102-025-01297-x

• Rojas-Jaramillo, Andrés et al. " Impact of the deep squat on articular knee joint structures: friend or enemy? A scoping review. " Frontiers in Sports and Active Living vol. 6, 1477796. 19 Nov. 2024, doi:10.3389/fspor.2024.1477796

• Song, Ke et al. " Patellofemoral Joint Loading Progression Across 35 Weight-Bearing Rehabilitation Exercises and Activities of Daily Living. " The American Journal of Sports Medicine vol. 51,8 (2023): 2110-2119. doi:10.1177/03635465231175160

• Gunhamn, Ted et al. " Knee extensor training in patients with patellofemoral pain: a systematic review and synthesis. " Frontiers in Rehabilitation Sciences vol. 6, 1641054. 11 Aug. 2025, doi:10.3389/fresc.2025.1641054

Experts

Brandon Guastafeste, Sports PT and owner of All Around Athlet

This story was originally published by Men's Journal on Oct 16, 2026, where it first appeared in the Fitness section. Add Men's Journal as a Preferred Source by clicking here.