Flip Side Ninja Park, Lowell

Flip Side Ninja Park takes all the excitement and adrenaline of American Ninja Warrior and transforms it into a fun fitness regimen for people of all skill levels. The facility is home to a wide variety of challenging and ever-changing obstacles, including the infamous Warped Wall, in which guests attempt to scale the wall's tricky, curved incline. The trained staff, which includes a United States Coast Guard veteran and a World Freerunning Parkour Federation coach, carefully observe the numerous activities, as well as help both kids and adults achieve their goals. Additionally, Flip Side Ninja Park selects the best junior and adult ninjas to join the facility's competitive team, who showcase their skills at various National Ninja League or Ultimate Ninja Athlete Association competitions.

Here's a quick peek at some of Flip Side Ninja Park's other offerings:

• OCR Fit: designed for those planning on undertaking obstacle course races like the Spartan Race and Tough Mudder, the class takes place both in the gym and outdoors, and aims to improve speed, agility, strength, and technique
• Aerial Yoga: as guests hang in the air from yoga hammocks, they perform a variety of poses and motions that keep joints, muscles, and bones stress-free