Racquet sports (tennis, racquetball, squash, badminton, and paddle tennis) are sports of speed and agility and involve athletes of all ages.

Rowing is a lifelong, year-round sport that requires dedication and intense training. Rowing on the water, an ergometer, and indoor water tanks along with weight training and running are integral parts of training. In high school and college

Running, as a sport, can involve a number of different forms, including the following:

Many athletes actively seek changes in body weight in hopes of improving athletic performance. In some sports, such as wrestling, gymnastics, dancing, and running, athletes and coaches associate optimal performance with a relatively low body

The calcaneal apophysis is a growth center where the Achilles tendon and the plantar fascia attach to the heel. It first appears in children aged 7 to 8 years. By ages 12 to 14 years the growth center matures and fuses to the heel bone.