You can run, bike, and hit the weight room any time of year. But swimming outside? That’s something that most of us can only do for a few short months this summer (unless you’re lucky enough to live in San Diego). So seize the opportunity and squeeze some swimming workouts into your regimen over the next few months. “Swimming is cardio, strength, HIIT, and flexibility all in one,” says Earl Walton, owner and head coach at Tailwind Endurance, an endurance sports coaching facility in New York City. “Plus it’s restorative — you can swim day after day after day and not suffer from overuse injuries.” As beneficial as swimming is, simple laps of freestyle can be boring. That’s where these nine fun workouts come in.