PHYSICAL   The physical component, the basis of any player's ability to play the game, includes all that is needed for a player to develop fitness, health and injury prevention. There are seven subcomponents interrelated to a player's physical development: motor skills, conditioning, speed, agility and quickness, strength, nutrition, flexibility and medical.   Proper development of a player's physical component is critical. A tennis teacher must always be conscious of this component, whether he or she is hitting with a student, using dead-ball feeds or overseeing an intense workout. Regardless of a student's age or skill level, it is vital for a teacher to assess the player's activity level and overall condition.   After sufficient evaluation of a student's physical condition, a teacher should be able to design a training regimen that mixes common sense and sound medical knowledge to create a program that is both enjoyable and educational for a player. Physical subcomponents The following list defines each of the subcomponents and explains them in a short video:   1. Motor skills - Training and coordination of both gross and fine motor skills. (e.g., running, hops, skips, jumps, carioca and eye-hand skills such as catch, dribble, throw, etc.) MORE 2. Conditioning - Aerobic and anaerobic conditioning (i.e. endurance and sprint training in conjunction with tennis-specific training) MORE 3. Speed, agility, quickness - Drills related to reaction, change of direction, all types of tennis movement, footwork and plyometrics MORE 4. Strength - Exercises using own body weight (e.g., push-ups, sit-ups, etc.), free weights or machines, plyometric drills MORE 5. Nutrition - Hydration before, during and after matches, eating a healthy diet based on age and training demands MORE 6. Flexibility - Warm-up, cool down and stretching principles, for injury prevention and training demands MORE 7. Medical - Knowing basic injury prevention and treatment (e.g., RICE), seeking appropriate medical attention and treatment when required MORE   Resources   Below is a list of available video clips describing in detail the physical component as well as each of its seven subcomponents. The physical evolution of the game of tennis