By CHIOMA OBINNA

Boosting the metabolism is the holy grail of weight watchers everywhere, but medical experts say how fast your body burns calories depends on several factors, expert says. Some people inherit a speedy metabolism. Medical investigation has shown that men tend to burn more calories than women, even while resting. And for most people, metabolism slows steadily after age 40. Although you can’t control your age, gender, or genetics, there are other ways to get a boost.

Build muscle

Our bodies constantly burn calories, even when we are doing nothing. This resting metabolic rate is much higher in people with more muscle. Every pound of muscle uses about six calories a day just to sustain itself, while each pound of fat burns only two calories daily. That small difference can add up over time. In addition, after a bout of resistance training, muscles are activated all over your body, increasing your average daily metabolic rate.

Kick your workout up a notch

Aerobic exercise may not build big muscles, but it can rev up your metabolism in the hours after a workout. The key is to push yourself. High-intensity exercise delivers a bigger, longer increase in resting metabolic rate than low or moderate workouts. To get the benefits, try a more intense class at the gym or include short bursts of jogging during your regular walk.

Drink more water

The body needs water to process calories. If you are even mildly dehydrated, your metabolism may slow down. In one study, adults who drank eight or more glasses of water a day burned more calories than those who drank four. To stay hydrated, drink a glass of water or other unsweetened beverage before every meal and snack. In addition, try munching on fresh fruits and vegetables, which are full of fluid.

Have your drinks on the rocks

Ice-cold beverages prompt the body to burn more calories during digestion. Research suggests five or six glasses of water on the rocks can use up an extra 10 calories a day. That might not sound like much, but it adds up to a pound of weight loss per year without dieting. You can get the same benefit by drinking iced tea or coffee, as long as you forego the cream and sugar.

Eat more often

Eating more really can help you lose weight – eating more often, that is. When you eat large meals with many hours in between, you train your metabolism to slow down. Having a small meal or snack every 3 to 4 hours keeps your metabolism cranking, so you burn more calories over the course of a day. Several studies have also shown that people who snack regularly eat less at meal time.

Spice up your meals

Spicy foods contain chemical compounds that kick the metabolism into high gear. Eating a tablespoon of chopped red or green chili pepper can temporarily boost your metabolic rate by 23 per cent. Some studies suggest the effect only lasts about half an hour, but if you eat spicy foods often, the benefits may add up. For a quick boost, spice up pasta dishes, chili, and stews with red-pepper flakes.

Eat more protein

The body burns up to twice as many calories digesting protein as it uses for fat or carbohydrates. Although you want to eat a balanced diet, replacing some carbohaydrates with lean, protein-rich foods can jump-start the metabolism at mealtime. Healthy sources of protein include lean beef and pork, fish, white meat chicken, tofu, nuts, beans, eggs, and low-fat dairy products.

Drink black coffee

If you are a coffee drinker, you probably enjoy the increased energy and concentration that follows your morning ritual. Well, some of these benefits are linked to a short-term increase in your metabolic rate. In one study, the caffeine in two cups of coffee prompted a 145-pound woman to burn 50 extra calories over the next four hours. Just be sure to drink it black. If you add cream, sugar, or flavoured syrups, you will take in far more calories than you burn.

Drink green tea

Drinking green tea offers the combined benefits of caffeine and catechins, substances shown to raise metabolism for a of couple hours.

Research suggests drinking two to four cups of either tea may push the body to burn an extra 50 calories each day. That adds up to five pounds of weight loss in a year.

Best bets

The impact of different foods and drinks on the metabolism is small compared to what you need for sustained weight loss. Your best bet for creating a mean calorie-burning machine is to build muscle and stay active. The more you move during the day, the more calories you burn. And remember: working out in the morning has the benefit of revving up your metabolism for hours.

Avoid crash diets

Crash diets those involving eating fewer than 1,000 calories a day are disastrous for anyone hoping to quicken their metabolism. Although these diets may help you drop pounds at the expense of good nutrition, a high percentage of the loss comes from muscle. The lower your muscle mass, the slower your metabolism. The final result is a body that burns far fewer calories and gains weight faster than the one you had before the diet.