Swimming burns more calories than

   Walking and Running
   Walking, Running and Cycling

The human body emits light

   I’ll tell you after dark

Listening to music while you exercise

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

The brain is more active

   During the day
   During the night
   During an episode of University Challenge

You will find the hammer and anvil

   In the tools section of the Argos catalogue
   In your foot
   In your ear