At this Marina del Rey yoga class, an unbalanced down-dog could land you in the Pacific. YogAqua teaches yoga classes atop stand-up paddleboards in the saltwater. Thirty minutes of the 90-minute class is spent paddling (excellent for the core, back and arms) and the rest is yoga practice on the board. Because the poses are performed on a moving surface, you will be engaging muscles that you normally wouldn't, says founder Sarah Tiefenthaler. It's far easier to find that inner quietude floating on the quiet waters of the marina at Mother's Beach, while seals play and fish jump, than in a crowded, sweaty yoga class. And best of all, tumbling from your board proves to be a quick way to cool off. 4101 Admiralty Way, Marina del Rey. (805) 283-9642, yogaqua.com.