How does swimming burn so many calories (close to higher intensity workouts) even if my heart stays in the warm up zone the whole time?

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How does swimming burn so many calories (close to higher intensity workouts) even if my heart stays in the warm up zone the whole time?

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Swimming is a decent full-body workout, but it also means you’re immersed in water that’s significantly below your body temperature. Water is far more thermally conductive than air, and it has a very high specific heat, so it rapidly cools you down. Your body then has to raise its metabolic rate to keep you warm, and that burns calories.

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Apart from feeding you body with nutrients the heart has to keep the blood pressure in good levels.

If you are standing up then your heart rate increases to compensate.

In water you are laying down. That allows the heart to beat slower because it needs less pressure.

Also, have you tried swimming butterfly? Your heart rate will go up really fast.

Are you in pretty good shape? If you’re 180lb, you’re doing the same amount of work to move 180lb through the water whether it’s easy, or hard. If it’s easy it may not make your heart work harder, but you’re still doing the same work/burning the same number of calories.

When I started lap swimming at the age of 45 it kicked my ass to swim a full hour of laps, but I’d burn 700ish calories doing so. After a year of consistent work I could swim a full hour without stopping, my lap times were faster, my distances were greater, but I never got winded and I was still burning 700ish calories in an hour.

Swimming is one of the best weight loss exercises you can do.

The cold of the water helps burn calories as your body works to regulate temperature

The intensity can be adjusted easily by changing the swim style or staying under water longer

It is much easier on the joints than running or walking since your body isn’t having rapid and repeated impact of your body weight.