Why So Many of Us Don’t Lose Weight When We Exercise

Discussion in 'Health and Fitness' started by Frederick Foresight, Jul 14, 2019.

  1. https://www.nytimes.com/2019/07/03/well/move/weight-loss-gain-exercise.html

    Most of us eat more when we exercise, and though it may be just a few extra bites a day, the result is weight gain.


    People hoping to lose weight with exercise often wind up being their own worst enemies, according to the latest, large-scale study of workouts, weight loss and their frustrating interaction. The study, which carefully tracked how much people ate and moved after starting to exercise, found that many of them failed to lose or even gained weight while exercising, because they also reflexively changed their lives in other, subtle ways. But a few people in the study did drop pounds, and their success could have lessons for the rest of us.

    In a just and cogent universe, of course, exercise would make us thin. Physical activity consumes calories, and if we burn calories without replacing them or reducing our overall energy expenditure, we enter negative energy balance. In that condition, we utilize our internal energy stores, which most of us would call our flab, and shed weight.

    But human metabolisms are not always just and cogent, and multiple past studies have shown that most men and women who begin new exercise routines drop only about 30 percent or 40 percent as much weight as would be expected, given how many additional calories they are expending with exercise.

    Why exercise underwhelms for weight reduction remains an open question, though. Scientists studying the issue agree that most of us compensate for the calories lost to exercise by eating more, moving less, or both. Our resting metabolic rates may also decline if we start to lose pounds. All of this shifts us back toward positive energy balance, otherwise known as weight gain.

    It has not been clear, however, whether we tend primarily to overeat or under-move as compensation, and the issue matters. To avoid compensating, we need to know how we are doing it.

    So, for the new study, which was published last month in the American Journal of Clinical Nutrition, researchers with the Pennington Biomedical Research Center in Baton Rouge, La., and other institutions decided to exhort a large group of inactive people into exercising and closely track how their waistlines and daily habits changed.

    They began by recruiting 171 sedentary, overweight men and women ages 18 to 65, measured their weight, resting metabolic rates, typical levels of hunger, aerobic fitness and, using complex, liquid energy tracers, daily food intake and energy expenditure. With standardized psychological questionnaires, they also explored whether the volunteers felt that virtuous, healthy actions now justified less-desirable ones later.

    They then randomly assigned some to continue their normal lives as a control, while others began supervised exercise programs. In one, people exercised three times a week on treadmills or exercise bikes until they had burned eight calories for every kilogram of their body weight, or about 700 calories a week for most of them. The other program upped the exercise to 20 calories for every kilogram of body weight, or about 1,760 calories a week.

    Both routines lasted for six months. Throughout, the volunteers wore activity monitors, and the researchers periodically checked their metabolic rates, energy intake and fitness. The volunteers could eat as they chose.

    Afterward, everyone returned to the lab for comprehensive remeasurements. As expected, the control group’s numbers, including their weights and resting metabolic rates, had not budged. But neither had those of most of the exercisers. A few had dropped pounds, but about two-thirds of those in the shorter-workout group and 90 percent of those in the longer-workout group had lost less weight than would have been expected.

    They had compensated for their extra calorie burn.

    But not by moving less, the scientists found. Almost everyone’s activity-monitor readouts had remained steady. Instead, the exercisers were eating more, other measurements and calculations showed. The extra calories were slight — about 90 additional calories each day for the some-exercise group, and 125 a day for the most-exercise set. But this noshing was sufficient to undercut weight loss.

    Interestingly, the researchers also found that those exercisers who had compensated the most and lost the least weight tended to be those who had reported at the start that they thought some good health habits gave people license for other, insalubrious ones.

    “In effect, they felt that it’s O.K. to trade behaviors,” says Timothy Church, an adjunct professor at Pennington who led the new study. “It’s the ‘if I jog now, I deserve that doughnut’ idea.”

    In consequence, they lost little if any weight with exercise.

    But the study produced other, more encouraging data, he says. For one thing, almost everyone’s resting metabolic rates remained unchanged; slowed metabolisms would encourage pounds to creep back. And those few exercisers who avoided an extra cookie or handful of crackers did lose weight.

    “There was only a small difference, over all,” between those who compensated and those who did not, Dr. Church says. “We’re talking about barely 100 calories. That’s about four bites of most food.”

    So, people hoping to lose weight with exercise should pay close attention to what they eat, he says, and skip those last four bites, no matter how tempting.

  2. It's a fancy experiment setup, but the results do not surprise me at all. You often see that people start doing exercise, and then say they are allowed to eat more "because they exercise". No wonder that they don't (or hardly) lose weight. No training regime can overcome a bad eating regime.
    LS1Z28, GregorySG9 and Clubber Lang like this.
  3. That's about the size of it.
  4. DTB2


    If I eat clean and lift, I will not lose a pound.

    If I eat clean and run-no weights, I lose weight easily.
  5. maxinger


    You don't see fat tribal African people who live by hunting.
    During WW2, there was no fat POW.
    Those poorest of poorest people are always thin.

    So it is possible to be thin / slim.
  6. Yeah, but that's not the kind of fat camp you ever want to attend.
  7. vanzandt


    So for lack of a better place to share this lol...

    I had to run into Kohls earlier today to pick something up and I saw something that... I had to look twice to make sure I wasn't missing something.

    Can someone please tell me how in the world Wrangler can have a line of "Athletic Fit" jeans... and yet offer a size 42x30 in said jeans? I mean... whatever. Only in America. :D
  8. If you search on the Internet, you will easily find that running is not very useful and even harmful. Why do athletes retire early? Because it is not normal for the body to do so hard. Yoga, fitness, gymnastics are much more useful sports. I advise everyone to download homework apps and practice. To this, write down your indicators in a table. Weight, temperature, etc. .. To help you converter, type 80 c to f.
  9. DTB2


    Gymnastics has the highest sports injury rate IIRC

    no bueno
    Frederick Foresight likes this.
  10. I didn't know yoga was a sport. I didn't know fitness was a sport.

    I do agree that running is overrated. Of course, I'm biased because I dislike it. I think sprinting has its place, though.
    Last edited: Apr 2, 2020
    #10     Apr 2, 2020