Olympic racing and FINA events mandate a water temperature between 77 – 82 degrees (25 – 28°C), whereas synchronized swimming requires an 81-degree (give or take a degree) pool.
Any member of the Coney Island Polar Bear Club would tell you that swimming in frigid water is an adrenaline rush, or a “boon to one’s stamina.” Meanwhile, devotees of Iceland’s Blue Lagoon go bananas for the 104-113 degree (40 – 45°C) hot springs. One thing is for certain — varying degrees of water temperatures can have major effects on your body.

While there can be serious health concerns on both sides of the spectrum, a little nudge in one direction or another can have a big impact on your health. But it may not have as big an impact on your fat burn as you’d like.