Injury Prevention & Rehabilitation

Acute and Chronic Injuries

Sporting injuries fall into two broad categories, depending on how they occur and how quickly they develop.

• An acute injury happens suddenly, either during exercise or competition – e.g. a sprained ankle or torn ligament – and is usually immediately obvious, typically causing sudden severe pain, swelling around the injured site, and an inability to bear weight on the area
• A chronic injury, sometimes called an over-use injury, develops gradually from repeated stress over a long period of playing or training, rather than from a single incident. Because chronic injuries build up slowly, they are often ignored by performers in their early stages, which can allow the underlying problem to worsen

Fractures

A fracture is a break or crack in a bone, and can occur in several different forms depending on how the bone is damaged:

• A compound (open) fracture is where the broken bone pierces through the skin, creating a much higher risk of infection than a closed fracture
• Other common types include a spiral fracture (a winding break, often from a twisting force), a longitudinal fracture (a break running along the length of the bone), a buckle fracture (a partial, incomplete break, more common in children's more flexible bones) and a greenstick fracture (where the bone bends and cracks on only one side rather than breaking fully through – again more common in children, whose bones are more pliable)

Dislocations, Strains and Sprains

• A dislocation occurs at a joint when the ends of the bones are forced out of their normal position, often from a heavy fall or direct contact with another player (e.g. in a football tackle) – the joint is usually visibly out of place and the injury is extremely painful
• A strain is an injury to a muscle, commonly called a 'pulled' or 'torn' muscle, occurring when muscle fibres are stretched beyond their normal capacity – often from repeated rapid acceleration and deceleration, which is why strains are common even among elite, well-conditioned athletes
• A sprain is an injury to a ligament (the strong tissue connecting bone to bone at a joint), occurring when excessive twisting or turning forces the ligament to stretch too far or tear. The ankle is a particularly common site for sprains in sport, due to the amount of twisting the joint undergoes

Common Overuse (Chronic) Injuries

Chronic/over-use injuries typically produce pain during activity, a dull ache at rest, and swelling around the affected area. Several specific overuse injuries are common in sport:

• Achilles tendonitis is inflammation and pain in the Achilles tendon – the tendon connecting the calf muscles to the heel bone, essential for walking, running and jumping – caused by repeated overuse of the tendon
• A stress fracture is a tiny crack in a bone, most common in the weight-bearing bones of the leg and foot, caused when exercise intensity or volume is increased too quickly. The muscles supporting the bone become fatigued and can no longer absorb impact effectively, transferring that stress directly onto the bone until it eventually cracks
• Tennis elbow (the medical term is lateral epicondylitis) is inflammation of the muscles and tendons at the elbow that are responsible for extending the wrist, causing pain and tenderness on the bony outer point of the elbow. Despite the name, this injury is actually most commonly seen in golfers rather than tennis players; when the same type of injury occurs on the inner side of the elbow, it's referred to as 'golfer's elbow'

Injury Prevention: Screening and Protective Equipment

• Screening involves assessing a performer before they take part in sport to identify anything that could put them at greater risk of injury or of a serious medical event – this can include an examination of muscle imbalances, core strength, posture and joint range of movement, alongside cardiac checks such as an ECG (electrocardiogram), which records the heart's electrical activity and can highlight underlying cardiac risk. Screening allows a tailored conditioning programme to be designed to correct any issues found, though it isn't 100% accurate and can occasionally miss a genuine problem or flag one that doesn't actually exist
• Protective equipment appropriate to the demands and risks of a specific sport also reduces injury risk – e.g. shin pads in football, a scrum cap/gum shield/body armour in rugby, padding and a helmet in cricket, or eye guards in squash. Whatever equipment is used, it must fit correctly and meet relevant safety/governing body regulations to be effective

Taping and Bracing

• Taping provides light external support to a joint, commonly used to help prevent common injuries (e.g. taping the ankle before playing to reduce the risk of a sprain) or to give extra support during recovery from a previous injury
• Bracing offers more substantial, rigid support than taping and is typically used to protect a joint that is weak or has been previously injured, most often at the ankle or knee

Proprioceptive Training

Proprioception is the largely subconscious sense of body/joint position, relying on receptor nerves (proprioceptors) located in the muscles, joints and tendons, combined with visual and auditory input, to coordinate smooth, accurate movement. This sense is commonly impaired following an injury.

• Proprioceptive training uses activities such as hopping, jumping and balance exercises to restore this sense of joint control, and forms an important part of rehabilitating a previously sprained joint, since a sprain often damages the proprioceptors around it
• A balance/wobble board is a common proprioceptive training tool – by standing on the unstable board, the ankle joint is strengthened while the body is simultaneously retrained to react automatically to unstable/wobbly movements without consciously having to think about it

Strength Training for Rehabilitation

Strength training uses resistance of some form to prepare the body for exercise or to reduce re-injury risk during rehabilitation. Common types used in a recovery programme include:

• Free weights (e.g. dumbbells, kettlebells) – because they are not guided by a machine, the surrounding muscles must also work to stabilise the weight as it is lifted, alongside the target muscle
• Machine weights – the machine controls the movement path, making this a safer option in the early stages of injury recovery, typically starting with lighter loads and building up gradually
• Body weight exercises (e.g. the plank) – using the performer's own body as resistance, often to build core strength, which supports better balance and posture and can reduce imbalances that might otherwise contribute to injury
• Theraband resistance bands – made of latex and available in a range of resistance strengths, with lighter bands typically used early in rehabilitation and stronger bands introduced as the injury improves

Hyperbaric Chambers and Cryotherapy

• A hyperbaric chamber is a pressurised chamber (similar in principle to an aeroplane cabin) that allows a performer to breathe air containing up to 100% pure oxygen. The increased pressure allows more oxygen to dissolve into the blood plasma and diffuse into an injured area, which can reduce swelling and stimulate white blood cell activity, increasing blood supply to help the injury heal
• Cryotherapy is the use of cold temperatures to treat an injury, most often for muscle strains and ligament sprains, traditionally guided by the POLICE protocol (Protection, Optimal Loading, Ice, Compression, Elevation). Whole-body cryotherapy (WBC) exposes the whole body (rather than just the injured muscle) to extremely cold temperatures (roughly -100°C) for a short period (around three minutes), in a freezing chamber the performer wears minimal, protective clothing to enter. This causes blood to be temporarily directed away from the limbs toward the body's core, before rapidly returning once the session ends, flushing the area with oxygen-rich blood that helps speed healing

Hydrotherapy and Ice Baths

• Hydrotherapy uses exercise performed in warm water (typically around 35-37°C) to improve circulation, relieve pain and aid relaxation. The water's buoyancy supports some of the performer's body weight, reducing the load placed on joints, which allows more exercise to be completed than would be possible on land – while the water's resistance also strengthens the area as it is worked against. Some hydrotherapy pools include underwater treadmills, where increasing the running speed increases the resistance provided by the water
• Ice baths are a popular recovery method, where the muscles used in a session are submerged in cold water (around 5-10°C) for roughly 10 minutes immediately after exercise. This causes blood vessels to tighten and constricts blood flow to the legs; on leaving the bath, blood floods back into the muscles, helping remove the lactic acid that had built up during exercise, though the actual benefits are debated and the experience is understandably uncomfortable for the performer

Recovery Methods: Compression, Massage and Foam Rolling

• Compression garments are tight-fitting clothing worn to improve blood circulation and help prevent conditions such as deep vein thrombosis (DVT) – a blood clot forming in one of the body's deep veins – during long periods of inactivity, such as long-haul flights. Some athletes also use them to try to reduce inflammation and the delayed onset of muscle soreness (DOMS) after exercise, though there is limited strong research evidence to confirm this benefit; correctly fitted garments should apply a specific level of pressure to be effective
• Sports massage targets the soft tissue (muscles, tendons, ligaments) that builds up tension from regular training, and can increase blood flow to the muscle (helping deliver oxygen/nutrients and remove waste products like lactic acid), stretch tight soft tissue to relieve tension, and break down scar tissue that might otherwise restrict a joint's or muscle's movement
• Foam rolling is a form of self-massage where a performer uses their own body weight against a cylindrical foam roller to apply pressure to a muscle and the surrounding fascia (the fibrous connective tissue surrounding muscles). This can help prevent injury and improve mobility, though if it becomes too painful, some body weight should be supported through the arms instead to reduce the pressure applied

Sleep and Nutrition for Recovery

Alongside physical treatments, adequate sleep and correct nutrition are essential to fully recovering from training, and both are heavily influenced by individual differences such as how physically demanding a person's training programme is.

• Non-REM (deep) sleep is the sleep stage without rapid eye movement, made up of three progressively deeper stages, and is when the body carries out most of its muscle repair – the brain diverts blood flow away from itself and toward the muscles during this stage, meaning cutting sleep short can directly limit how well the body is able to repair itself. Most adults require a minimum of 8-9 hours of sleep each night to support this recovery process
• Post-exercise nutrition is important because muscle glycogen stores are depleted during exercise and need to be replenished for full recovery. The body is most receptive to restoring glycogen in the first 20 minutes after exercise, so many elite performers consume a carbohydrate source with a 3:1 to 4:1 ratio of carbohydrate to protein in this window (e.g. chocolate milk) – this combination re-synthesises muscle glycogen more efficiently than carbohydrate alone, and being in liquid form allows it to be absorbed faster than solid food while also helping rehydrate the performer at the same time