Richard Branson may be 73 years old, but his daily routine is remarkably active, for any age.

He starts and ends his day with tennis, and gets up to kite-surfing and cycling in between.

Branson is the billionaire founder of Virgin Group, a conglomerate with companies in fields spanning travel, telecommunications, entertainment, space and more. Some of its biggest businesses include airline Virgin Atlantic, wireless services provider Virgin Mobile, hospitality chain Virgin Hotels, and spaceflight firm Virgin Galactic.

Here's a closer look at Branson's daily routine.