Our metabolism does slow with aging. It's difficult to compare the rate of your metabolism from puberty to adulthood. As we age. we tend to gain body fat and lose muscle mass. Research that suggests that your mitochondria (the powerhouses of your cells) doesn’t work as well as you get older.

What helps?

• Exercise: This is the best way to boost your metabolism. You'll burn calories during and after your workout while building lean muscle tissue, which speeds up metabolism over time. 
• Cardio training: Increase the intensity of your workout for a metabolic boost. 
• Weight training: Basic exercises that strengthen your arms, legs and of course the core will have a greater metabolism stimulating effect.  

Ahh, metabolism — friend or foe? We understand its importance but did you know over time if we mistreat it with yo-yo diets or rapid weight loss, it may become damaged. Luckily, with the right lifestyle changes, you can repair it.

WHAT IS METABOLISM?

Metabolism is a critical cycle in the body, responsible for producing energy. Your metabolism affects: 

• Proper function of the organs
• Reparation of the cells
• Digestion of food
• Breathing
• Circulating blood
• Controlling body temperature
• Contracting muscles
• Digesting food and nutrients
• Eliminating waste through urine and feces
• Functioning of the brain and nerves

7 ways to boost your metabolism

Drink grapefruit juice
Researchers at UC Berkeley found that mice on a high-fat diet that drank sweetened grapefruit juice gained less weight than other mice that drank sweetened water.
After 100 days, the juice-drinking mice weighed 18.4 percent less than the other mice, and they had better metabolic health (better blood-sugar levels and insulin sensitivity).
Results only occurred with a high-fat diet

Get more exposure to colder temps
According to research, exposure to the cold can boost the metabolism by anything from 8 to 80 percent, depending on variables like the duration, your age, and your BMI.
A 2014 study found that 15 minutes in the cold could be the metabolic equivalent of an hour of exercise.
Another study from last year found that people who live in warmer parts of Spain are more likely to be obese than people who live in cooler parts of the country.

Build muscle
Your basic metabolic rate accounts for about 70 percent of the calories you burn every day.
People who have more muscle burn more calories, even at rest

Get some sun
Researchers have found that moderate exposure to UV rays releases nitric oxide, which slows the development of obesity and type 2 diabetes.
During their 2014 study, scientists found that overfed mice exposed to UV light actually slowed their weight gain and displayed fewer signs of diabetes.

Eat more dairy
A study published in the journal Diabetes found that a decrease in calcium levels can trigger the release of calcitriol, a hormone that causes people to store fat.
Many experts support the results and say that a calcium deficiency can slow metabolism.
Reach for two or three daily servings of low-fat milk, cheese, or yogurt.

Laugh more
Researchers at Vanderbilt University found that genuinely laughing causes a 10 to 20 percent increase in energy expenditure and heart rate.
Based on their study, 10 to 15 minutes of legit laughter a day could burn up to 40 extra calories.

Eat more organic foods
Canadian researchers found that dieters with the highest levels of organochlorines (found in pesticides) had slower metabolisms than those with lower levels of the pollutant.
Other research recently published in Environmental Health Perspectives reports that pesticides can contribute to weight gain.