Thanks to devoted fans and fit celebrities, CrossFit has soared in popularity. Using simple exercises involving body resistance training, aerobics, and weight lifting, CrossFit keeps it interesting by mixing up exercises and increasing difficulty over time. So if you're bored with your current gym routine, accept this CrossFit-inspired challenge for a high intensity workout!

You don't even have to go to the gym. This workout doesn't require any equipment, just your own motivation to keep going. Spell out your name and birth year with these challenge moves, and you have your workout for the day. Want to really push yourself? Spell your full name (first and last) and your full birthday (month, day, and year). This will increase the intensity to have you really feeling the burn!