In the 1800s, a whaler paddle-slapping a rival mermaid wrangler signaled the declaration of an oceanic duel at high seas. Experience more-polite paddle usage with today's Groupon: for $49, you get one month of unlimited stand-up paddleboard yoga and fitness lessons from OEX Dive & Kayak (a $540 value).

The fusion of stand-up paddleboarding and yoga creates a low-impact workout that builds body strength, balance, and coordination while stretching the body and centering the mind. Meanwhile, stand-up paddleboard fitness lessons utilize running, paddle sprints, core exercises, and additional forms of cardio on land and water. Traditional yoga routines are performed on a foam paddleboard that sways and grooves to the vibrations of Sail Bay, creating a challenging exercise routine for any fitness-focused sea urchin or other aqua-loving student. All equipment is provided, but bringing your own board is always encouraged.

On an OEX paddleboard, you'll rip your abs and shoulders and tear up the San Diego sun. A beginner lesson is recommended to acquire the skills necessary to conquer this maritime sport in ways that only come naturally to direct descendants of McConaughey.