Why does your metabolism slow down after the age of 30?
462710
If you are inactive, research shows that you can lose 1 percent of your muscle annually after the age of 30. Muscle loss causes your metabolism to slow down, and that slowing will cause you to gain fat over time. If you don't strength train, you will lose muscle over time. If you only do aerobic training such as walking or biking, you will lose muscle over time. The key to avoiding muscle loss is to strength train!If you can increase muscle, you'll burn calories more efficiently because your metabolism will speed up and help you burn more calories and fat, 24 hours per day.
516204
Congratulations on your high metabolic rate and yourself lucky. Some big people want to lose weight and can't no matter how hard they try. This goes the same to those thin ones who want to gain weight but can't no matter how much they eat. But then again, your metabolism might change as you grow older, as it tends to slow down...thus you start to put on some pounds. So be as active in life as you can to maintain your metabolism in a tip-top shape!
462177
Eat a lot of protein and sugar.  Plus, the longer you go between meals, the more your metabolism slows down.  Drinking water sparingly may slow it as well.  Stress can slow it, but don't stress yourself out on account of this.  Metabolism is also genetic.  Hopefully you can change it up, but it may just be how you are.
707744
People in their 20's and early thirties brains have not developed fully
173799
If y ou're under 18 eat more vegetables and fruit. Walk at least 1 mile a day. If you're 20-30 pray you can look at food and get fat. The metabolism slows down for women especially at the age of 22. I'm 30 years old I started fasting 3 days out of the week W-F and during the week I drink a large glass of water b4 I eat so I will not over do it. I only eat sweets during my cycle which is once a month. By then I deserve them but at the same time they're low calorie snacks and ice cream. Get more active Im not saying you will get a six pack or anything which really looks unattractive on women but it will not be flabby and If I recall that's your goal.
837831
Men stop growing in young adulthood, around their early 20s, even though they still produce growth hormone (everyone does, the amount just depends on age). The amount that a man will grow however is not just genetic, it's multi factorial. Basically it's all about diet, exercise and yes, genetics.\n\nA man's metabolism will slow down as he ages, particularly noticeable when his serum levels of testosterone start diminishing (about age 40). This is when the much commented mid-life crisis occurs, the beer belly starts becoming more and more noticeable, among other things. \n\nThis however isn't cookie-cutter. You can be young and have a slow metabolism, this can be because of your lifestyle or because of hormonal problems. People with hypothyroidism have slow metabolisms and are usually overweight (the thyroid hormones are the ones that control the metabolism's rate). People who are couch potatoes also have slow metabolisms. It all depends.
319667
You eat a lot and don't gain any weight.  Which if you are young is probably not a problem.  Doctors can prescribe drugs and hormones to correct this problem.  However, it might not be a problem with your metabolism, it could be something like a anemia, tapeworm, or just about any other illness.  The good thing is that they can just about all be corrected or eliminated with prescriptions and proper diets.  Best advice on this one, just talk to your doctor.
1172433
Do you really want to lower your metabolism?  That would mean that you burn calories less efficiently.  I think most people are trying to raise their metabolic rate to allow them to burn more calories each day.\n\nIf you want to lower it, you could lose muscle mass and try fasting.  Both are bad for your metabolic raet.\n\nIf you actually want to raise it, you should eat regular meals and try weight training to build muscle mass.  Muscle burns more calories than other body mass, so you will be able to lose weight while still eating the same amount of calories each day.
825125
Your metabolism slows down at first, but if you stay in the cold, it quickens to keep you warm and to keep you alive and not in hypothermia. Slowing your metabloism doesn't make you stay younger though, makes you fat... To stay younger your cells would have to freeze and you'd be just a young looking corpse afterwards!
539654
a high metabolism burns more calories with less effort\nthe more calories burnt the less body fat\n\nexercise and eatting when ur hungry\nall help to get a higher metabolism
225430
It's messing up your metabolism.  Your body needs its nutrients at specific times because it's still growing.  If you eat at odd times that are spaced out your body won't know how to adjust its metabolism to what's appropriate for you.
331168
its great when  your young and have a lot of energy. but as you get older you eventually slow down. well most people do.
950150
As you age, your body becomes less resilient to any type of stress.  \nthings that get harder when you get older include, but are not limited to:\n1. starting an exercise program, \n2. recovering from surgery\n3. recovering from a hangover.  \n\nThink about your body like a car.  An old car might need a constant supply of oil, just like you might need a constant supply of vitamins now.  Alcohol can deprive your body of nutrients.  Since your body needs those nutrients more than it did say 18 years ago, then your body will react badly to the alcohol.
1142629
Sometimes it happens. If you have been excersizing more, if you've made any changes in your life that were stressful, if you've changed your diet. \n\nCycles change as women mature and you might notice differences in how blood regulates itself when you are 18, 21, 25, 30 and 35.\n\nIt is absolutely nothing to worry about.
150212
Nothing is "wrong" with you.\n\nYou have a fast metabolism.\n\nMaybe it will slow down with time.\n\nTrust me, in the long run you'll be grateful.
24577
The only way to jumpstart your metabolism is to exercise.  You will start building muscle which means you will eventually have to burn more fuel to do the same movements.  Also, your body will actually constuct more capillaries inside of your muscles so that it can get fuel there more quickly.
1017130
it depends on how old you are, how tall you are, and how much you weigh\n\nhow many calories you burn on a daily basis without any activity--is called the basal metabolic rate--or the BMR\n\nfor a person with more muscle--the BMR would be higher--say 2200 calories then a skinnier person--for example, only 1800 calories. \n\nan older person has a lower BMR than a younger person--since the younger person's metabolism is much better (hence old people also feel cold more often)\n\nso BMR can vary from 1600 to 2300--depending on what your body makeup, age, etc. \n\n\nflatter stomach is achieved primarily thru nutrition--and working out\ni would say 70% nutrition, 30% working out\nand focus on cardio to shed fat--since you can't spot reduce--cardio is best for overall fat loss