Types of sports injury
By time:
- Acute injury: sudden, from one big force (a fall, a twist, a collision). Pain starts at once.
- Chronic (overuse) injury: builds slowly from repeated stress with too little rest, such as shin splints, tennis elbow or stress fractures.
By tissue:
- Soft tissue: strain (muscle or tendon is overstretched or torn), sprain (ligament is overstretched or torn, often ankle or knee), contusion (bruise), cuts and blisters.
- Hard tissue: fracture (broken bone: simple/closed or compound/open, where bone breaks the skin), dislocation (bones pushed out of a joint).
- Head injury: a concussion is a brain injury from a knock. Signs: headache, confusion, dizziness. The player must stop and see a doctor: "if in doubt, sit them out".
Why injuries happen: risk factors
A risk factor is anything that makes injury more likely.
- Intrinsic (inside you): low fitness or flexibility, poor technique, muscle imbalance, an old injury not fully healed, tiredness, age, not enough sleep or food.
- Extrinsic (outside you): unsafe ground or weather, wrong or broken equipment, bad coaching, rough or illegal play, too many games, poor supervision.
A risk assessment means: spot the hazards, decide who could be hurt and how badly, act to lower the risk (remove, change or protect), and check again. Schools do this before PE lessons and trips.
Preventing injuries
- Warm-up (about 10 to 15 minutes): gentle cardio to raise heart rate and muscle temperature, dynamic stretches, then sport-specific drills. Warm muscles are more elastic and react faster.
- Cool-down: easy jogging and stretching help remove waste like lactic acid and lower heart rate gradually.
- Correct technique and taught skills (how to fall, how to tackle).
- Protective equipment: helmets, pads, mouth guards, shin guards, the right shoes.
- Rules and officials stop dangerous play; match the opponents by age, weight or skill.
- Sensible training load: raise load gradually (progressive overload), allow rest and recovery days, avoid sudden big jumps. Some coaches compare this week's load with the average of the last four weeks (acute:chronic ratio); about 0.8 to 1.3 is safest, above 1.5 is risky.
- Good sleep, food and water; do not train through sharp pain.
Treatment, rehabilitation and recovery
Immediate care for sprains, strains and bruises: RICE.
- Rest: stop playing, protect the part.
- Ice: cold pack wrapped in cloth, 10 to 20 minutes every 2 to 3 hours in the first 48 hours; never ice on bare skin.
- Compression: firm (not tight) bandage to limit swelling.
- Elevation: raise the part above heart level.
Some guides add P for Protect (PRICE). Suspected fracture, dislocation or head injury: do not move the part, call for medical help.
Rehabilitation brings the athlete back safely: (1) control pain and swelling, (2) regain range of motion, (3) rebuild strength and balance (proprioception), (4) sport-specific drills, (5) gradual return to full play. Skipping stages often causes re-injury. Recovery methods after hard training include sleep, food with protein and carbohydrate, fluids, cool-down, massage, and cold-water or contrast baths.
Key formulas and definitions
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Worked examples
1. A sprinter feels a sudden sharp pain at the back of the thigh mid-race. Name the injury type and first aid.
Acute soft tissue injury: a hamstring strain (muscle tear). Stop running, then RICE: rest, ice wrapped in cloth for 10 to 20 minutes, a compression bandage and leg raised.
2. Last 4 weeks a runner ran 20, 22, 24 and 26 km. This week she plans 40 km. Work out her load ratio. Is it safe?
Average = (20 + 22 + 24 + 26) ÷ 4 = 23 km. Ratio = 40 ÷ 23 ≈ 1.74. That is above 1.5, so it is risky. A safer plan is about 26 to 29 km (ratio about 1.1 to 1.3).
3. List two intrinsic and two extrinsic risk factors in a school hockey match on a frosty morning.
Intrinsic: players have not warmed up; a player has a half-healed ankle sprain. Extrinsic: hard frozen pitch; some players without shin guards or mouth guards.
Common mistakes
- Mixing up sprain and strain. A sprain is a ligament; a strain is a muscle or tendon.
- Putting ice straight on bare skin or for too long. Wrap it and use 10 to 20 minutes.
- Returning to matches as soon as pain stops. Strength and balance must come back first.
- Static long stretching as the only warm-up. A warm-up must first raise heart rate and muscle temperature.