Participating in a variety of sports is fun and healthy for children and adults. However, it's critical that before you participate in any sport, you are aware of the precautions you can take to prevent injuries. Warming up, strengthening your muscles and cooling down after any type of exercise are excellent ways to help prevent sports injuries.  
Unfortunately, even when taking these and other precautions, injuries still occur. The good news is that many pains, sprains, tears and other sports injuries can be avoided with a little common sense and a little information about injury prevention.
There are two kinds of sports injuries: those that happen suddenly (acute) and those that develop gradually as a result of repeating an action over and over again (overuse). Here are some common injuries in each category: Acute injuries are Contusions • Fractures • Joint dislocation • Ligament tears • Joint sprains. Overuse injuries: • Heel spur (Plantar Fasciitis) • Carpal Tunnel • Shin splints • Muscle strains • Stress fractures • Tendonitis • Golfer’s elbow, etc.
Sports Injury Preventive measures:
1. Choose the right sport: Make sure the sports you do are safe and appropriate for you. For example, while weight-bearing exercises such as aerobics and jogging are great activities for most people, they may not be good choices for people who have certain joint conditions.
2. Suit up properly:  Use proper protective gear and any special equipment or clothing that is recommended for your sport. For example, runners should choose shoes that combine the appropriate amount of shock absorption and motion control for their particular needs.
3. Learn proper technique: Take lessons to make sure you’re using proper form for your sport. Good technique is an important part of injury prevention.
4. Condition your body: Getting in proper condition before you begin a sport will make the whole experience more enjoyable and could spare you from developing a preventable injury.
5. Develop a balanced fitness program: Whether you’re planning on playing an organized sport or training for your first marathon, there are three essential components to achieving total fitness and avoiding injury in the process: cardiovascular fitness, strength and flexibility.
6. Follow the rule of warm-up, stretch and cool down.
7. Take time off: Staying physically active is great, but it’s important to take time off, too. When you put your body through rigorous workouts, you need time to recover physically. This is increasingly true the older you get. So that remember — rest your body at least one day each week
Sports Injury Rehabilitation:
1. Help yourself with- P. R.I.C.E. (Protection, Rest, Ice, Compression & Elevation)
2. Cross-train during recovery:  To maintain your endurance and overall conditioning during your rehabilitation period, consider cross-training. You can give your injury “relative rest” by shifting the focus of your exercise to another part of the body. For example, you can swim after an ankle injury.
3. Ask or medical and Professional help for comprehensive treatment.