Roller Derby Injuries: Ankles, Knees, Wrists and Concussion

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Second period, tight score, a packed rec-center gym. The jammer with the star on her helmet cuts to the inside line, a blocker squares up and lands a hip check, and down she goes, sliding on her knee pads into the infield. Three blockers tangle behind her. Two pop back up. The third stays down, holding her wrist, and the refs whistle the jam off. Roller derby injuries are part of the deal in a full-contact sport played on wheels, but they follow a clear pattern, and the sport has built real safety rules around them. This page covers how often skaters get hurt, the common injuries, concussion, the protective gear rules, learning to fall and when to see a professional.

This page is general information, not medical advice. If you’re hurt, see a sports medicine doctor, physical therapist (PT) or certified athletic trainer (AT). For the bigger picture of the sport, start at our roller derby hub.

How often derby skaters get hurt

Derby is full contact, and the research says so plainly. In a survey of 1,395 women’s flat-track skaters, 48.7% reported at least one injury in the previous 12 months. In a smaller study of a Kansas City league, 79% of skaters had been injured at some point, half of them more than once, and 64% had needed medical care. The Women’s Flat Track Derby Association (WFTDA) is blunt about it too: its risk management guidelines say concussions “will occur in roller derby”.

A fair caveat: most derby research is self-reported surveys, and we found no studies that count injuries per 1,000 hours of play the way soccer or football research does. They come mostly from women’s leagues; men’s and open-gender teams (the Men’s Roller Derby Association lists over 40 member teams) and junior leagues are less studied.

Where derby injuries happen

In the survey of 1,395 skaters, ankles made up 22.5% of injuries, knees 21% and the head 11%. A large 2022 international survey of 665 skaters from 25 countries also listed broken arms and legs, torn knee ligaments and sprained ankles among the most frequent injuries.

Ankles

Quick cuts, tangled wheels and pileups put ankles at risk. A sprain brings pain, swelling, bruising and an ankle that “gives out”. The National Athletic Trainers’ Association (NATA) says the strongest risk factor for a sprain is a previous sprain, and recommends a balance program of at least 3 months afterward. Some skaters use a lace-up brace like the ASO EVO while they rebuild; ask your PT whether it fits in your boot. More in our ankle braces for athletes guide.

Knees

Knees take two kinds of hits in derby. The American Academy of Orthopaedic Surgeons (AAOS) explains that most ACL tears happen without contact, when an athlete pivots, cuts or lands with the knee nearly straight; a pop, a knee that gives way and swelling within a day are warning signs. Derby adds direct blows: knees hit the floor in every fall and get caught in pileups, which is why the rules require knee pads with hard caps. Some skaters wear a knee sleeve under the pad; it isn’t a substitute for rehab.

Wrists, arms, hands and fingers

Across all roller skating, US emergency data from 2002 to 2021 shows fractures as the most common injury, with 68% of roller-skating fractures in the shoulder, arm, elbow or wrist. The evidence on wrist guards is some of the strongest in sports safety: in a CDC-led study of injured in-line skaters, those without wrist guards had about 10 times the odds of a wrist injury. AAOS warns that a broken scaphoid (a small bone at the base of the thumb) can be mistaken for a sprain, so a wrist that’s still sore and swollen the next day deserves an X-ray. In pileups, fingers on the floor are in the path of other skaters’ wheels, which is why coaches teach skaters to keep their hands in when they’re down.

Tailbone, hips and bruises

Backward falls land on the tailbone, and hip checks leave big bruises on thighs and hips. WFTDA allows optional padded shorts, tailbone protectors, shin guards, chest protectors (“turtle-shell bras”) and protective cups, as long as they don’t endanger other skaters.

Concussion in roller derby

Concussion is the injury every league has to plan for. In the 2022 international survey of 665 skaters, current players reported an average of 2.2 concussions, which worked out to about one concussion every two years of play. In the survey of 1,395 skaters, 11% of injuries were to the head and 75% of those were diagnosed as concussions. Interestingly, position (jammer or blocker), full-contact scrimmages and the type of floor weren’t linked to the number of concussions in the international survey; a prior neurological history and uncorrected vision were.

A concussion can come from a blow to the head or from a body hit that whips the head back and forth. WFTDA’s guidelines warn of second-impact syndrome, a rare but potentially catastrophic injury when the brain is hit again before an earlier concussion has healed.

Recognize it and remove the skater (CDC HEADS UP)

The CDC’s HEADS UP program says: if you think someone has a concussion, they stop for the day and don’t return until a health care provider clears them. Signs others may see: looking dazed or stunned, slow to answer, moving clumsily, confused about the jam or the score, mood or behavior changes, vomiting. Symptoms the skater may feel: headache or pressure, dizziness, nausea, blurry or double vision, sensitivity to light or noise, feeling foggy or “just not right”.

Call 911 or go to the emergency department for the CDC’s danger signs: one pupil larger than the other, a headache that gets worse and won’t go away, slurred speech, weakness or numbness, repeated vomiting, seizures, growing confusion or agitation, unusual drowsiness, or passing out.

What WFTDA’s guidelines require

• Someone trained to check. Every derby activity needs a volunteer familiar with the Concussion Recognition Tool; public games need an athletic training or medical professional. WFTDA recommends CDC HEADS UP training or better for these volunteers.
• One symptom is enough. With the Concussion Recognition Tool, a single symptom is grounds to remove the skater from further activity, and refusing an assessment is grounds for removal too.
• Not alone. A skater assessed for a possible concussion should be watched for several hours, including overnight, whatever the result.
• No same-day return. A skater with signs of concussion can’t return that day, and comes back step by step under a professional trained in concussion return to play. Leagues must also follow local youth concussion laws.

The step-by-step return (rest, light aerobic exercise, non-contact skating, non-contact drills, full contact after medical clearance, then games) is laid out on our recovery page. No helmet or mouthguard has been shown to prevent every concussion; the rules on gear, legal hits and removal from play work together.

How the rules protect skaters

Under The Rules of Flat Track Roller Derby:

• Required gear: every skater wears a helmet, mouthguard, wrist guards, elbow pads and knee pads, and protective gear may not be removed during play. WFTDA’s guidelines add that guards, pads and helmets need a hard shell or inserts, worn the way the maker intends and in good condition. Cage-style face shields aren’t allowed; clear full- or half-face shields made for your helmet are.
• Legal targets: blocks may only be made to the chest, front and sides of the torso, arms, hands, hips and the front and sides of the legs above mid-thigh. The head, the back and the legs below mid-thigh are off limits.
• Legal blocking zones: skaters block with the torso, arms above the elbow and legs above mid-thigh; no forearms, heads or lower legs, and no blocking a skater who is down. Pinning or hooking an opponent’s limb and forceful jabs with elbows or knees are unsporting contact.
• Injury stoppages: a skater whose injury stops a jam or the clock sits out the next three jams, and the rest of the period if it happens twice.
• Medical staff: WFTDA’s minimum for games and tournaments is two professional medical staff (first responders, EMTs, paramedics or physicians), with one available at all times; practices need at least one trained volunteer.

The full rules are explained on our roller derby rules page, and helmets, pads and fit in our roller derby gear guide. For helmets, the US Consumer Product Safety Commission points aggressive skaters to a skateboard helmet certified to ASTM F1492; multi-certified helmets like the Pro-Tec Classic Certified meet that and the CPSC bike standard.

Learn to fall before you learn to hit

WFTDA’s guidelines list the skills a skater should have before playing in a game, including being able to “fall small” and to recover or fall “without grabbing or flailing”, and they say a game is not the place to learn the fundamentals. The old WFTDA skills standard described falling as sliding into the floor on your knee pads “rather than crashing onto pads”. Derby falls in practice:

• Get low when you feel yourself going, so there’s less distance to fall.
• Fall forward onto your pads, knees first, rather than reaching back or catching yourself on straight arms.
• Fall small: tuck your arms in so you don’t trip others or leave limbs in the pack.
• Keep your fingers in and get up quickly without using your hands.

Our roller derby training page has falling drills you can practice. In focus groups, derby skaters themselves named mismatched skill levels and poor-quality gear as top injury risks, so new skaters should earn their way into full contact. Juniors: see youth roller derby.

When to see a sports medicine doctor, PT or athletic trainer

• Right away (emergency): any concussion danger sign, a skater who was knocked out or is unresponsive (WFTDA’s guidelines say to call emergency services), a bone that looks bent or out of place, numbness, or a deep cut.
• Within a day or two: a suspected concussion, a wrist or ankle that stays swollen or sore, you can’t grip or bear weight, or a knee that swelled fast or gave way.
• Soon: pain that keeps coming back, an ankle that keeps rolling, or a knee that feels unstable in crossovers or when you take a hit.

A sports medicine physician diagnoses; a physical therapist guides rehab and the return to skates and then to contact. WFTDA notes that pain isn’t always a reliable sign that you’re ready to go back, so get real advice. For more on the same injuries in other sports, compare roller skating injuries (wrists and recreational falls) and soccer injuries (ankles, knees and concussion).

Roller derby injuries: FAQs

What is the most common roller derby injury?

Ankle and knee injuries lead. In a survey of 1,395 women’s flat-track skaters, ankles were 22.5% of injuries and knees 21%. Head injuries were 11%, and three in four of those were concussions. Broken arms, torn knee ligaments and sprained ankles are also common.

How common are concussions in roller derby?

Common enough that every league plans for them. In a 2022 survey of 665 skaters from 25 countries, current players reported 2.2 concussions on average, about one every two years of play. WFTDA requires a trained volunteer to check skaters and no same-day return after signs of concussion.

What protective gear is required in roller derby?

WFTDA rules require a helmet, mouthguard, wrist guards, elbow pads and knee pads, and its guidelines want hard shells or inserts on the guards, pads and helmet. Padded shorts, tailbone protectors, shin guards and clear face shields are optional.

Can you hit someone in the head in roller derby?

No. Legal target zones are the chest, front and sides of the torso, arms, hands, hips and legs above mid-thigh. Hits to the head, the back or below mid-thigh are penalties, as are elbow and forearm blocks.

When can I go back to derby after a concussion?

Not on the same day. After symptoms clear, a step-by-step return under a professional trained in concussion goes from light exercise to non-contact skating, non-contact drills and then full contact after medical clearance. Each step usually takes at least a day.