Ancient Polynesian athletes had the right idea with stand-up paddleboarding. As paddlers catch gentle waves and soak in the sun, the sport whips their bodies into shape as a side effect, leaving toned bellies, arms, legs, and back in its wake. At SUPGirlz, the all-female staff members—all of whom have roots in surfing and other boarding activities including wake-, skate-, and snowboarding—share their passion for the water-based sport with students of all abilities. Their classes range from beginner paddles to SUP Bootcamp, an intense workout that, much like a grizzled seadog's life, is divided between land and sea. Several times a year, a scenic fishing village in Ecuador sets the stage for their all-inclusive camps, which incorporate yoga, surfing, and stand-up paddleboarding into nine days of outdoorsy fun.