Swimming is another fabulous outdoor fitness activity for those looking for a way to have fun in the sun this summer. Due to water’s buoyancy, swimming can provide a low-impact workout on your muscles. Swimming engages multiple muscle groups, providing a full-body workout that improves cardiovascular health, enhances flexibility and builds strength. Swimming outdoors also exposes you to natural sunlight, allowing your body to absorb vitamin D, which plays a vital role in bone health and immune function. Whether you choose to plunge into a lake, ride the waves at your local beach, or swim laps in your community pool, swimming outdoors during the summer months provides the perfect escape from the heat and the opportunity to work your whole body.