It is a well known fact that swimming is easier in the sea than in a freshwater lake. does this relate to buoyancy force or to some completely unrelated reasons

When water is salty, it becomes heavier which makes it easier for your body to float. The buoyant force from water and the pull of gravity defines how an individual float. It differs significantly among swimmers. It needs technique alterations because it interrelates with any movement code. Relatively than being overlooked, the characteristics of a swimmer flotation must always be well thought out when learning a new method element or altering an old one. The fortitude of technique instruction or variations must first include an exploration of a swimmer flotation. All characteristics of "ideal" method will be adapted by flotation effects.