Sprains involve the stretching or tearing of ligaments, typically occurring in the ankle or knee. Strains refer to injuries of muscles or tendons, often resulting from overexertion or improper technique. Fractures can range from stress fractures, caused by repetitive force, to acute fractures from falls or collisions. Tendonitis is the inflammation of a tendon, commonly seen in athletes who perform repetitive motions, such as runners or tennis players. Injuries can be acute, arising from a specific incident, or chronic, developing over time due to repetitive stress. Prevention strategies include proper warm-up, strength training, using appropriate gear, and ensuring proper technique.