Understanding Metabolism
Metabolism is a topic that captivates many, yet it is often shrouded in misunderstanding. The desire to “boost” or “speed up” one’s metabolism is common, with the hope of burning more calories and losing body fat. However, achieving this is not as straightforward as social media might suggest. Numerous viral TikTok videos promote simple solutions such as consuming apple cider vinegar, utilising infrared saunas, or trying cold baths. In reality, many of these purported tricks lack substantial scientific backing, and those that do often yield negligible results in terms of weight management.
At its core, metabolism refers to the body’s process of converting food into energy. This energy fuels vital functions, including the operation of the heart and lungs, tissue repair, hormone regulation, and other essential activities. Dr. Jonathan Gabison, an associate professor of family medicine at the University of Michigan and a certified obesity medicine specialist, succinctly describes metabolism as “the collection of chemical processes that keep our bodies alive and functioning.” Notably, around 20% of the energy produced by your metabolism is allocated to brain function, underscoring the importance of an efficient metabolism for cognitive health.
Is It Possible to Speed Up Metabolism?
The straightforward answer is yes; various factors including genetics, age, and weight influence your metabolism. However, this does not imply that your metabolic rate is fixed. Dr. Shebani Sethi, a clinical associate professor of psychiatry and behavioural sciences at Stanford University and the founding director of the world’s first academic clinical programme in metabolic psychiatry, emphasises that metabolism is highly adaptable. Nevertheless, relying on quick fixes such as apple cider vinegar or metabolism-boosting supplements is ineffective. Research indicates that enhancing metabolism requires consistent long-term habits. Here are five key strategies that can make a significant difference:
Increasing Overall Physical Activity
Every movement you make burns calories and boosts your metabolism, both during the activity and afterward. Visualise your metabolism as a cake: two-thirds of your daily energy expenditure is dedicated to keeping you alive (this is known as your basal metabolic rate), while the remainder is used for digesting food and physical movement. Increasing your activity level is one of the simplest methods to enhance your metabolism. The Centres for Disease Control and Prevention (CDC) recommend that adults engage in at least 150 minutes of moderate-intensity physical activity each week.
This can encompass specific exercises such as running, hiking, or attending fitness classes, but it also includes all movement outside of formal exercise—referred to as NEAT (non-exercise activity thermogenesis). Elevating your daily step count, prioritising physically engaging hobbies like gardening or dog walking, or even taking on more household chores and grocery shopping all contribute to increasing your overall activity level.
The Importance of Strength Training
Strength training is essential for developing and maintaining muscle mass. Muscle tissue is metabolically active, meaning that maintaining it burns more calories than maintaining fat tissue. Consequently, increasing your muscle mass can provide a modest boost to your metabolism. Engaging in strength training also enhances your overall health; for instance, since muscle tissue utilises most of the glucose in the bloodstream, having more muscle can improve your body’s ability to manage glucose levels and help prevent spikes in blood sugar. Research indicates that increased muscle mass also enhances insulin sensitivity, even in individuals without diabetes.
The CDC’s exercise guidelines suggest incorporating at least two days of strength training each week. This can include bodyweight exercises such as push-ups and lunges, lifting weights with dumbbells, kettlebells, barbells, or cable machines, or using resistance bands. Dr. Gabison advises maintaining consistency in your workout routine, so it’s best to select exercises you can sustain over the long term. If you are just starting, be cautious not to push yourself too hard initially to avoid the risk of injury.
The Role of Protein in Metabolism
Protein has gained significant attention recently, and rightly so; consuming adequate amounts of high-quality protein has proven benefits for metabolism. As the building block of muscle, sufficient protein intake supports muscle growth and maintenance, particularly when engaging in resistance training. Additionally, protein has the highest thermic effect of all three macronutrients, meaning its digestion burns more calories than that of carbohydrates or fats. Furthermore, protein is the macronutrient most effective at promoting a sense of fullness after meals, which can help control cravings and contribute to weight management.
However, balance is crucial. Dr. Sun Kim, an endocrinologist and assistant professor of medicine at Stanford, notes that views vary among healthcare professionals regarding the optimal amount of protein for health. Excessive protein consumption will not “magically” accelerate metabolism and may even worsen insulin sensitivity in some cases. For most healthy adults, the recommended daily protein intake is 0.8 grams per kilogram of body weight. For instance, an individual weighing 120 pounds requires approximately 43 grams of protein daily, roughly equivalent to two four-ounce hamburgers. Incorporating some protein into each snack and meal throughout the day should make it easy to meet this requirement. However, certain groups may require more, such as pregnant or breastfeeding individuals, those who are highly active, and older adults at risk of insufficient protein intake and muscle loss.
The Importance of Quality Sleep
One often-overlooked habit that can improve metabolism is quality sleep. Insufficient sleep can disrupt metabolic processes, leading to a cascade of issues, including poor glucose control, increased hunger the following day, and reduced energy expenditure. Sleep-deprived individuals tend to be less active, which can elevate the risk of obesity, type 2 diabetes, hypertension, and heart disease. Sleep also affects hormones that regulate metabolism.
While there is no specific number of hours that one should sleep each night, research indicates that most adults perform best with between seven and nine hours of quality rest most nights.
Managing Chronic Stress
Chronic stress keeps cortisol levels elevated, which can degrade muscle tissue and slow metabolism. Persistent stress may also disrupt hormones that regulate appetite, leading to cravings that can prompt overeating. All these factors can influence weight. Research shows that chronic stress may increase the risk of obesity, type 2 diabetes, and related cardiometabolic complications.
Unfortunately, there is no quick fix for stress reduction, so you may need to explore various options to find what works best for you. Some starting points include practising yoga, meditating, engaging in breathing exercises, taking walks outdoors, journaling, spending time with loved ones, pursuing relaxing hobbies, or starting therapy to discuss your concerns.
Long-Term Benefits of a Healthy Metabolism
Promoting a healthy metabolism can indeed enhance the number of calories you burn and aid in weight management. However, it also contributes to what is known as “metabolic health,” which encompasses factors such as blood pressure, cholesterol levels, insulin sensitivity, and overall body fat. Good metabolic health is crucial for preventing chronic diseases such as type 2 diabetes and heart disease. The healthier your metabolism, the more calories you will burn, and the better your metabolic health will be.