"Hi, I'm Brit Hertz! Follow along as I take on fun gymnastics-based challenges, pull pranks on my boyfriend, and have an overall blast with my friends right here on Good Vibes Only." ...

Ready to test your fitness? See how many strict pull-ups you can do in 60 seconds and learn how to improve your strength and endurance with these expert tips.

The event also marks the start of the Fittest School Challenge, which encourages children to be active and earn prize money for their schools. (WATE) (WATE) (WATE) (WATE) Along the route ...