The fastest ever tennis serve was recorded at

   163.4 mph
   Mach 1 – resulting in a sonic boom
   155.6 mph

What is the highest frequency noise a human can register?

   20,000 hz
   30,000 hz
   Mariah Carey

Swimming burns more calories than

   Walking and Running
   Walking, Running and Cycling

Your lungs are

   Equal in size
   The right lung is bigger than the left
   The left lung is bigger than the right

Listening to music while you exercise

   Makes you look cool
   Increases performance by 15%
   Strengthens your ear drums