Hourly 4-second sprints prevent impairment of postprandial fat metabolism • Hacker News Board

Re: Hourly 4-second sprints prevent impairment of postprandial fat metabolism

#131

Post by BoiledCabbage » Fri, May 01, 2020, 11:43 AM UTC

geddy wrote: post #89

tarsinge wrote: post #83

Earlier quoted context omitted.

> I mean it is literally the holy grail of dieting. Slightly related but I have recently visited the US and I have been shocked how supercharged high sugar (ie addictive) high calorie foods are everywhere, like desserts above 1000kcal alone. It takes much more effort than in the other countries to manage caloric intake here, even eating random junk food where I live it’s hard to go above 3000 per day.

There's definitely an obsession with a good value in America, so everything you find in a restaurant is ultra high in calories. Even seemingly innocuous foods are probably sauteed in pounds of butter and made as criminally unhealthy as possible. It's like they're engineered to make you fat. That being said, if you're looking to stay inside your clothes while visiting America, avoid eating at restaurants entirely.

While kind of you to say, we Americans don't put butter on everything because we're looking for a good value.

Re: Hourly 4-second sprints prevent impairment of postprandial fat metabolism

#132

Post by covidSurvivor19 » Sat, May 02, 2020, 9:22 AM UTC

samatman wrote: post #44

covidSurvivor19 wrote: post #42

Earlier quoted context omitted.

Your analysis seems to be in the right direction but I think that the body uses this energy in many more ways than just heat. Moving muscles, pumping blood, keeping ionic gradients in the kidneys, and in cells, producing waste products, do seem to take energy. Also, consider the water we lose due to evaporation just by breathing, we are constantly creating a significant amount of heat and dissipating it into the envi…

> This extra 1000Kcal would be roughly a 50 watt increase in average metabolic rate during a whole day. This calculation makes the theory implausible. A resting human burns about 100 watts[0], this would imply 50% more energy output than that, over the whole day. I too find that I'm warmer after a workout, and sweat lightly for up to a few hours after my heart rate returns to normal, which itself takes almost an hour…

I'm not denying the 2nd law, but metabolism is more complicated than just heat or mechanical work. One example, the process by which the body transforms ammonia into urea, requires energy. Not 100% sure of the details but some of this energy might be captured chemically, not sure if urea has a higher (free energy? I don't remember the exact term). Furthermore with this example, since urine is hyperosmotic, the body has to do a process against normal ion/water diffusion, in order to excrete minerals and not excessive water. This osmotic pressure, contains some potential energy.

Re: Hourly 4-second sprints prevent impairment of postprandial fat metabolism

#133

Post by covidSurvivor19 » Sat, May 02, 2020, 9:25 AM UTC

mikekchar wrote: post #56

covidSurvivor19 wrote: post #42

Earlier quoted context omitted.

Your analysis seems to be in the right direction but I think that the body uses this energy in many more ways than just heat. Moving muscles, pumping blood, keeping ionic gradients in the kidneys, and in cells, producing waste products, do seem to take energy. Also, consider the water we lose due to evaporation just by breathing, we are constantly creating a significant amount of heat and dissipating it into the envi…

The thing is that because of the 2nd law of thermodynamics, that energy does not go away when we use it. Moving muscles, pumping blood, etc uses energy and transforms it to heat. It's a bit weird that energy doesn't go away when we "use" it, but that's how the universe works :-) What can happen is that energy is locked up in chemical structures (or, I guess as physical potential energy). So if you evaporate water, th…

Yeah, completely agree, no one is denying the 2nd law :) Let's just say biochemistry is quite complicated with myriad metabolic pathways. I find it plausible that the body does not necessarily use all calories ingested all the time. Some probably remain in the digestive tract.

Re: Hourly 4-second sprints prevent impairment of postprandial fat metabolism

#134

Post by covidSurvivor19 » Mon, May 04, 2020, 1:10 AM UTC

SketchySeaBeast wrote: post #110

covidSurvivor19 wrote: post #34

Earlier quoted context omitted.

I mean this sounds way healthier to me than endless cardio. That is much more taxing for the body. This short sprints could certainly spike metabolism without the running out of limiting factors that happens with endurance exercise. Net effect, your body stays in a physiologically high activity state without producing excess stress hormones. Sign me up

It's not offering all the other benefits of exercise (ie. building muscle and cardiovascular health). You're not going to not get fat doing this, and I doubt it'll keep you from being out of breath while climbing the stairs.

Cardio builds very little muscle. Take it from the mouth of a quite competitive high school runner. Used to run about 30km per week (not high by many standards, exceedingly high by my current standards). Diet and lifestyle are more important for fitness. Endurance exercise is pretty bad for the heart, just look at the marathon runners. Ouch. The thing is cardio becomes addictive as most people have low intrinsic energy (due to diet, lack of sun, etc...) so when they release stress hormones through cardio they now feel a bit better. Not very sustainable in the long run. Look at our history as a species and nowhere do I see much cardio until the 20th century. Activity for sure, sign me up. Cardio as understood nowadays with endless running and crossfit? Only thing I might actually run away from

Re: Hourly 4-second sprints prevent impairment of postprandial fat metabolism

#135

Post by covidSurvivor19 » Mon, May 04, 2020, 5:18 AM UTC

BoiledCabbage wrote: post #131

geddy wrote: post #89

Earlier quoted context omitted.

There's definitely an obsession with a good value in America, so everything you find in a restaurant is ultra high in calories. Even seemingly innocuous foods are probably sauteed in pounds of butter and made as criminally unhealthy as possible. It's like they're engineered to make you fat. That being said, if you're looking to stay inside your clothes while visiting America, avoid eating at restaurants entirely.

While kind of you to say, we Americans don't put butter on everything because we're looking for a good value.

I know, I was like wait where are these restaurants? I think most places use cheapo oil and margarine.

Re: Hourly 4-second sprints prevent impairment of postprandial fat metabolism

#136

Post by geddy » Sun, May 10, 2020, 4:09 PM UTC

BoiledCabbage wrote: post #131

geddy wrote: post #89

Earlier quoted context omitted.

There's definitely an obsession with a good value in America, so everything you find in a restaurant is ultra high in calories. Even seemingly innocuous foods are probably sauteed in pounds of butter and made as criminally unhealthy as possible. It's like they're engineered to make you fat. That being said, if you're looking to stay inside your clothes while visiting America, avoid eating at restaurants entirely.

While kind of you to say, we Americans don't put butter on everything because we're looking for a good value.

What I meant was, fat adds to the flavor, and blows up the calories, in turn making you fuller and thus you think you got a good value for your dollar.