Is Fencing Bad for Your Knees? Lunge Form and Knee Pain

Is fencing bad for your knees? For most fencers, no. Injury research on fencing competitions shows a low overall injury rate, but it also shows that when fencers do get hurt, the knee is one of the most common places. That makes sense: every lunge ends with your front leg catching your body weight, and saber is built on repeated, explosive lunges. This guide explains what the research says about fencing knee injuries, why the lunge loads the front knee, what can cause back knee pain, and the habits that keep knees healthy. It also covers when knee pain means it's time to stop and see a clinician.

This is general information for fencers and parents, not medical advice. If your knee hurts, get it checked by a doctor or physical therapist.

Is fencing hard on the knees?

Fencing asks a lot of your legs. You spend a whole bout in en garde with both knees bent, and every attack is a burst of footwork that often ends in a lunge. A 2017 scoping review of fencing biomechanics by Chen and colleagues in PLOS ONE describes the lunge this way: the back leg's ankle, knee and hip extensors drive you forward, and the front leg then has to absorb the landing. The review also notes that the lunge exposes fencers to impact and shear forces that are spread unevenly across the body, because fencing is a one-sided sport.

So fencing is demanding on the knees, in the same way that basketball, tennis or squash are demanding on the knees. Demanding isn't the same as damaging, though. How you lunge, how much you train and what you train on make a big difference.

Fencing knee injuries: what the research shows

The best data on fencing injuries comes from Peter Harmer of Willamette University, who has tracked injuries at USA Fencing and FIE competitions for years.

• US national events. Harmer's five-year study of USA Fencing national competitions (2001 to 2006), published in the Clinical Journal of Sport Medicine in 2008, covered 78,223 competitors aged 8 to over 70. Athletic trainers recorded 184 injuries serious enough to force a fencer to withdraw, an overall rate of 0.3 per 1,000 athlete exposures. The knee was the most frequently injured location (19.6 percent of those injuries), followed by the thigh and the ankle. About 60 percent of all injuries were in the legs.
• Saber specifically. A follow-up conference abstract on the same data (Medicine & Science in Sports & Exercise, 2009) found that men's saber fencers had a higher risk of knee injury than men's foil or épée fencers. The total number of injuries in each group was small, so read that as a signal to take knee care seriously in saber, not as a precise number.
• International events. Harmer's five-year study of FIE competitions (2010 to 2014), published in the British Journal of Sports Medicine in 2019, found an injury rate of 0.28 per 1,000 athlete exposures. Most injuries were sprains and strains in the legs (72.4 percent), ankle sprains were the single most common injury, and almost half of injuries happened without any contact, from the fencer's own movement.

Both studies only count injuries that forced a fencer to withdraw from a competition. They don't capture the slow-building aches that never stop someone mid-event, so they tell you how rare serious incidents are, not how common sore knees are.

For the bigger picture on fencing safety, see our breakdown of USA Fencing's injury data. If you're wondering about the hits themselves, our guide to whether fencing hurts covers that.

Fencing knee pain from the lunge

The most common complaint in the research is pain at the front of the knee, around the kneecap. The Chen review lists patellofemoral pain (pain where the kneecap meets the thigh bone) as one of the main long-term problems linked to fencing injuries.

The lunge is the main reason. When your front foot lands, your front knee has to bend under load and brake your whole body. A few studies help explain what changes that load:

• Where your knee ends up. In a lab study of a general forward step lunge (not a fencing lunge), letting the knee travel out in front of the toes increased the load on the patellar tendon compared with keeping the knee behind the toes. A common fencing cue says the same thing: at the end of the lunge, your front knee should sit roughly over your ankle, not past your toes.
• Which way your knee points. The Chen review reports that female fencers in lab studies tended to show more inward knee movement and higher kneecap contact forces in the front leg during lunges. Sinclair and Bottoms found the same pattern in a small 2015 study of club-level épée fencers. That doesn't mean any fencer is destined for knee pain, but it's a reason to make sure your knee tracks in line with your front foot.
• What you land on. Greenhalgh, Bottoms and Sinclair (Journal of Applied Biomechanics, 2013) measured shock through the shin during fencing lunges. Concrete covered with vinyl produced significantly more shock than a wooden sprung floor. The Chen review also notes that fencing shoes tend to absorb less shock than running or squash shoes.

If your knee hurts when you lunge, it's usually a sign to look at how much you're lunging, how you're landing and what you're landing on. Our fencing footwork guide covers lunge technique in more detail.

Back knee pain in fencing

Most knee research in fencing looks at the front leg, because that's the one that takes the landing. The back leg does a different job: it pushes. In the lunge, the back leg extends hard to drive you forward, and in en garde it stays bent the whole time.

Research on back knee pain in fencers is limited, so we won't pretend to know the usual cause. A few practical things are worth checking with a coach or physical therapist:

• Does your back knee drop inward when you push off?
• Is your back foot turning or sliding in a way that twists the knee?
• Did the pain start after a big jump in training, like a camp week or a tournament weekend?

Pain that sits behind the knee, on the inside or outside of the joint, or that comes with swelling should be looked at by a clinician rather than "fixed" with technique alone.

How to protect your knees in fencing

None of these will guarantee you never get hurt, but they line up with the research above.

1. Land your lunge, don't fall into it. Front foot lands heel first, front knee finishes over the ankle, and you recover back to en garde under control. If your knee shoots past your toes, the lunge is usually too long for your current strength or your front foot landed too early.
2. Keep the knee in line with the foot. Your front knee should point the same way as your front toes when you land. A coach watching from the front can spot a knee that caves in faster than you can feel it.
3. Build strength off the strip. Stronger hips and thighs help you control the landing. A physical therapist or strength coach can give you exercises that fit your age and history.
4. Increase training gradually. The American Academy of Orthopaedic Surgeons lists a sudden change in how often or how hard you train as a common trigger for kneecap pain. Ramp up slowly before a camp or a busy tournament season.
5. Pay attention to the floor and shoes. When you can, avoid long lunge drills on concrete. If you're shopping for shoes, look for a pair made for fencing's quick forward-and-back footwork that still gives your feet some cushioning.
6. Stop the set when form breaks. Fatigue is when knees cave in and lunges get sloppy. Ten good lunges beat thirty bad ones.

When to see a doctor about fencing knee pain

According to the AAOS, kneecap pain often feels like a dull ache at the front of the knee that gets worse on stairs, when squatting, or after sitting with your knees bent for a long time. If that pain persists or it gets harder to move your knee, the AAOS advises seeing a doctor. The UK's NHS says to get medical help urgently if:

• your knee is very painful
• you can't put weight on it or move it
• it is badly swollen or has changed shape
• it locks, gives way or clicks painfully
• you have a fever along with redness or heat around the knee

For kids and teens, the AAOS notes that pain at the front of the knee is common in healthy young athletes and is usually linked to overuse or training changes. It lists clicking, locking, snapping or the knee giving way as reasons to see a doctor, and says to see one if the pain doesn't go away and gets in the way of activity. Parents should tell the coach about any knee pain so training can be adjusted while it's being checked.

Make knee care part of your fencing

Fencing is a lifelong sport, and plenty of adults start or come back to it later on. Our guide to fencing for adults covers what to expect in your first months. Healthy knees come from the same things that make good fencing: controlled footwork, sensible training loads and a coach who corrects your lunge early. If you'd like a coach to watch your footwork, Saber Nation's adult fencing classes and private lessons in Bethesda are a good place to start.

Frequently asked questions

Is fencing bad for your knees?

Not for most fencers. Competition injury studies show a low overall injury rate, but the knee is one of the most commonly injured areas, so good lunge technique and sensible training loads matter.

What are the most common fencing knee injuries?

Research on fencing competitions mostly records sprains and strains, and the knee was the most frequently injured location in a five-year study of US national events. Over time, pain around the kneecap (patellofemoral pain) is one of the most common complaints.

Why does my front knee hurt after lunging?

Your front knee brakes your body weight every time you land a lunge. Pain often comes from lunging too long, letting the knee travel past the toes or cave inward, a sudden increase in training, or hard floors. Have a coach check your form and see a clinician if it doesn't settle.

Why does my back knee hurt in fencing?

The back leg pushes you into every lunge and stays bent in en garde. Back knee pain is less studied than front knee pain, so have a coach check whether the knee drops inward or the foot twists, and see a clinician if the pain persists or comes with swelling.

Can you fence with knee pain?

Mild soreness that goes away quickly is common in any sport. Pain that lasts, gets worse, makes the knee hard to move, or comes with swelling, locking or the knee giving way should be checked by a doctor before you keep fencing.

Sources: Harmer, Clinical Journal of Sport Medicine (2008); Harmer, Medicine & Science in Sports & Exercise abstract (2009); Harmer, British Journal of Sports Medicine (2019); Chen et al., PLOS ONE (2017); Greenhalgh, Bottoms and Sinclair, Journal of Applied Biomechanics (2013); Sinclair and Bottoms, Research in Sports Medicine (2015); American Academy of Orthopaedic Surgeons, OrthoInfo (patellofemoral pain syndrome; adolescent anterior knee pain); NHS, Knee pain.