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There is at least one person in these comments extolling the virtues of keto viz a viz quick weight loss without exercise. I don't know what a normal low fat d

There is at least one person in these comments extolling the virtues of keto viz a viz quick weight loss without exercise. I don't know what a normal low fat diet is, but the overruling factor in weight loss/gain is the ratio of work (exercise) to energy input (calories).

DigitalJack 10y ago
Calories_out = Calories_in - Calories_stored. Caloric source matters, your body does different things with different sources. Your metabolism will be reduced by reducing calories in. They are not independent variables.
will_brown 10y ago
>but the overruling factor in weight loss/gain is the ratio of work (exercise) to energy input (calories). I don't think you are off, but the key is not weight loss/gain...the key is healthy weight loss/gain and that has everything to do with what you consume.
collyw 10y ago
Physics, years of evidence and common sense down voted on HN where solyent is seen as a good thing.
- rayiner 10y ago
  The physics is that exercise burns so few calories it's not worthwhile from a weight loss point of view.
  - jsprogrammer 10y ago
    Where have those physics been documented? I want to see the same person: 'immobile 'sitting most of the time, with short commutes and shopping trips 'intensely exercising 1 hr a day 'actively working out throughout the day while maintaining their current diet and weight.
    - schrodinger 10y ago
      These aren't independent variables. The point is that a half an hour run only burns around 300-400 calories, a deficit which could more easily be accomplished by diet. Also, it's possible that the run would increase your appetite. The point isn't that exercise _can't_ work, it's that aiming for dietary changes has a higher average ROI than exercise.
      - jsprogrammer 10y ago
        "these"? I don't know what that refers to. No one has argued that there is a lower than average ROI (you get paid for not eating?) from exercise.
  - DrScump 10y ago
    It's not physics, it's biochemistry. But it's more complicated than that. Genetics cause one's predisposition as to how responsive a person is to cardio; see the University of Bath study and/or Michael Mosley's "The Truth About Exercise".

DigitalJack 10y ago

Calories_out = Calories_in - Calories_stored. Caloric source matters, your body does different things with different sources. Your metabolism will be reduced by reducing calories in. They are not independent variables.

will_brown 10y ago

>but the overruling factor in weight loss/gain is the ratio of work (exercise) to energy input (calories). I don't think you are off, but the key is not weight loss/gain...the key is healthy weight loss/gain and that has everything to do with what you consume.

collyw 10y ago

Physics, years of evidence and common sense down voted on HN where solyent is seen as a good thing.

rayiner 10y ago
The physics is that exercise burns so few calories it's not worthwhile from a weight loss point of view.
- jsprogrammer 10y ago
  Where have those physics been documented? I want to see the same person: 'immobile 'sitting most of the time, with short commutes and shopping trips 'intensely exercising 1 hr a day 'actively working out throughout the day while maintaining their current diet and weight.
  - schrodinger 10y ago
    These aren't independent variables. The point is that a half an hour run only burns around 300-400 calories, a deficit which could more easily be accomplished by diet. Also, it's possible that the run would increase your appetite. The point isn't that exercise _can't_ work, it's that aiming for dietary changes has a higher average ROI than exercise.
    - jsprogrammer 10y ago
      "these"? I don't know what that refers to. No one has argued that there is a lower than average ROI (you get paid for not eating?) from exercise.
- DrScump 10y ago
  It's not physics, it's biochemistry. But it's more complicated than that. Genetics cause one's predisposition as to how responsive a person is to cardio; see the University of Bath study and/or Michael Mosley's "The Truth About Exercise".