Body composition and swimming

I have determined that when I swim, based on my heart rate, I am burning an enormous amount of calories. The other day, I wore my HR monitor and based on my average HR, time spent swimming, and my weight, I burned 1053 calories. Now, the next day, I ran for 40 minutes and burned 453 calories. I have noticed that when I just swim over a number of weeks, my LDL cholesterol readings go up and my body fat goes up as well. When I just run and don't burn as many calories (according to my HR monitor) my LDL drops, my HDLs go up, and my body fat decreases. I've noticed this now over the course of 13 years. Anybody know of any studies out there that might explain this? Why would an activity such as swimming that obviously burns a bunch of calories cause an increase in body fat?
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  • Former Member
    Former Member
    Sorry,but the "fat burning zone" as the best way to lose weight myth is not good physiology... True. The "fat burning range" was something I remember distance athletes training in back in the eighties (maybe still do) to train their bodies to burn fat so as to be able to draw on it in a marathon/century ride/ski loppet/whatever and not hit the wall. The general public selectively heard the "fat burning" part, just as they only heard the "diet" part of the high-carbohydrate diet that distance runners were starting to eat for energy - not for weight loss.
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  • Former Member
    Former Member
    Sorry,but the "fat burning zone" as the best way to lose weight myth is not good physiology... True. The "fat burning range" was something I remember distance athletes training in back in the eighties (maybe still do) to train their bodies to burn fat so as to be able to draw on it in a marathon/century ride/ski loppet/whatever and not hit the wall. The general public selectively heard the "fat burning" part, just as they only heard the "diet" part of the high-carbohydrate diet that distance runners were starting to eat for energy - not for weight loss.
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