Gym Membership
Your ninja probably already has a gym membership, so paying for a few months is a thoughtful gift that he/she is sure to love. If your ninja doesn't have a gym membership yet, look for one that offers classes and other perks for members.Bonus: Many gyms run membership specials over the holidays, so you can usually get a great deal on a new membership.
Fitness Wristband
Wearable technology is all the rage right now, and for good reason! Fitness tracking bands are a convenient way to track all of your daily exercise - helping your ninja to set and achieve even more fitness goals.Bonus: These fitness bands look really cool, so this gift will bring the "wow factor."
Kettlebells
Kettlebell workouts are a great way to build strength and they can be modified for all fitness levels. Professional grade kettlebells are most cost effective than other weights as well. Look for a good all-purpose kettlebell set to let your ninja progress in his/her workout.Bonus: Many online retailers offer free shipping during the holidays, which is a huge money saver when you are having a gift this heavy shipped!
Home Improvement Gift Cards
If your ninja has been thinking about building his/her own training obstacles or American Ninja Warrior mini course, a gift card to Lowe's, Home Depot or another home improvement store will help out significantly. It's not cheap to create quality ninja training obstacles, but there is no substitute for realistic practice when it comes to training.Bonus: They can pick out exactly what they need!
Airline Miles
If your ninja loves the American Ninja Warrior TV show, you can buy him/her an airline gift card or donate some miles so that they can fly to Vegas for the finals. Giving your ninja the chance to see Mt. Midoriyama is a really special experience that he/she will never forget!Bonus: You know no one else will get them this!