Is Swimming good for cardiovascular health?

The evidence points that way, though it's not yet conclusive. Swimming is a load-bearing-free aerobic modality with a real but comparatively modest observational evidence base for longevity. That's reflected in an evidence score of 58/100 for its role in cardiovascular health, drawn from 7 studies (2 RCTs), with an estimated impact on longevity rated moderate (55/100).