ha, 10,000 calorie per day/diet. A true American! Of course he was fit as can be and exercised a ton (which burned off all those calories) to maintain great shape and win gold medals. So yea, you can burn thousands of calories per day through exercise - says he trained 6hrs/day every single day, just eat a lot so you maintain a balanced weight.
I took Spice_Weasel’s comment as a net loss of thousands of calories per day not being sustainable; as in you’d deteriorate and die by continually losing that many net calories day after day. Which, I think, is why your metabolic rate (instinctively?) slows down in response to exercise - to keep that deficit to a minimum.
So, if Michael Phelps consumed 10,000 calories, but burned 12,000 (through metabolism and exercise) that would not be sustainable.
As alluded to upthread by a couple of posters, it seems one needs a lot of extra calories to complete a period of sustained physical exertion, such as hiking the Appalachian Trail. I’ve sometimes thought it would be worth doing it just for the extra food I could scarf.
If anyone is curious, way back in 2008 I came up with a list, here on the SDMB, of what you’d have to eat in one day to consume 30,000 calories. I remember thinking it would be a five-minute project, but it took me much longer than I expected, as I wanted to list a variety of foods and not just say “30 Big Macs at 1,000 calories each.”
A lower resting metabolic rate (body internal heating turned down) is often experienced as feeling cold. That lowered resting metabolic rate and loss of insulation from fat is felt to be why many feel cold after fat loss. A similar circumstance happens pathologically with hypothyroidism: slowed metabolism resulting in feeling cold, lower energy, possibly slowed heart rate, and occasionally weight gain.
Probably not the way to bet. I don’t know your definition of “a lot of weight”; obese people tend to get winded just trying to tie their shoes, and Stairs — well they are an Obstacle, things like that.
When it comes to carrying heavy loads, even large, highly fit people have more trouble. Infantry type guys told me linebacker physiques don’t handle large rucks as well as “Medium” or smaller or maybe shorter stature guys tend to fare better, in terms of percentage of body weight. Probably less back injuries too. Military loads border on insane.
To be clear, they have more muscle mass and that strength is required to support and move their own weight.
As to the factual question of the OP - recent study shows on average partially, and also with large amounts of individual variation.
Individual variation has to be emphasized. Some people eat more in response to increased activity. Some are more mindful as a result on may take in less. Some start to take stairs more and feel more energetic. Some decrease activity during the rest of day without even realizing it.
Almost all who exercise regularly will be healthier but not all will lose fat mass.
Because that’s what your perception of your body’s heat is. “I feel cold” is the name we give to the sensation of “My body’s thermal regulation systems are trying to increase my temperature”.
I can see why you could think that. But no, the message to try to increase your temperature is, sometimes, the result of, the homeostatic response to, the sensation of feeling cold: I am colder than my thermostat is set for so turn on the furnace. It is not the sensation itself.
The circumstance being hypothesized was a body trying to save energy to get back to a fat mass set point that it has been defining as its normal, so it dials down the thermostat. The person’s body temperature is in fact lower than its past usual and the person subjectively more easily feels cold. The furnace burns less.
All I can say is that my brother started going to the gym 3X per week a year ago to lose weight. He definitely has gotten stronger but he hasn’t lost any weight (or even his middle age flab). He hasn’t altered his diet in any way.
Exercise to gain strength, coordination, and muscle tone. If you want to lose weight, eat less.
There are different ways to interpret this. It could mean “He used to eat until he was full, and now he still eats until he’s full”. Which is how most people operate, when we’re not paying very close attention to how we eat. But it could be a very different actual diet, if “until we’re full” is different amounts of food.
He doesn’t think he’s eating more than he did previously. Certainly not less.
When the pandemic started I lost 20 pounds just because I was home away from my office snack drawer. I gained it all back when I started going back into the office. I threw away all the snacks yesterday
It’s possible to lose weight by exercising. I do it periodically. And it’s not something only young people can do; I’m 69.
What you have to do is incorporate some very high intensity exercise into your workout. Personally, I do it on bicycle, since that’s my prefered way of exercising. If I’m out riding, I climb a steep hill or two, going as hard as I can. In winter when the weather precludes riding, I do it on a stationary bike. Get warmed up and then pedal as hard as I can for a full minute. Have a cool-off period of slower pedaling for a few minutes and then do it again. Do it a third time if I’m up to it. I usually plateau at just over 200 lbs. To go lower I’d probably have to change my diet.
If cycling is not your thing, research HIIT (high intensity interval training) for doing it with weights.
That’s nice, but I was talking about lifting weights to build muscle.
That’s quite vague. By what metric has he gotten stronger?
Usually, you do need to alter your diet to gain muscle. I never said otherwise.
What you don’t need to do is deprive yourself of food; to the contrary, both building muscle and losing weight make it more important that you eat, and eat well.
But that doesn’t mean you can binge on food, or have an extreme caloric intake. However, by building muscle you can increase your basal metabolic rate, and work with your body to burn off stored body fat.
And lift weights to build muscle.
If you want to lose fat while gaining muscle (a far healthier goal, and one which will leave you looking better), eat a whole food diet rich in fruits, vegetables, fiber, and protein, along with plenty of water. Combine that with muscle building. And don’t worry so much about calories.
HIIT doesn’t require weights. It’s combining intervals of very high intensity cardio with periods where you recover. The simplest example is doing wind sprints (as opposed to a steady jog).
Of course he was fit as can be and exercised a ton (which burned off all those calories) to maintain great shape and win gold medals. So yea, you can burn thousands of calories per day through exercise - says he trained 6hrs/day every single day, just eat a lot so you maintain a balanced weight.