SUMMIT PEAKS BLOG
Metabolic Slowdown & Why You Should Care About It
This blog explains what metabolism is, why it’s important to maintain it at high levels, and what can cause it to decline.
What Is Metabolism?
Why It’s Important To Have A High Metabolism
What Can Cause My Metabolism To Slow Down?
Aging, nutrition, and training are the most potent drivers of your metabolism and can all lead to a metabolic decline. Here’s how each one can affect it.
Age: Aging will cause your metabolism to decline since the older we get, the harder it is to maintain muscles mass and the less metabolism-boosting hormones (e.g., growth hormone) we secrete. The metabolic decline caused by aging is much less acute than the one nutrition or training can cause, and in most cases, it’s responsible for only a small portion of a person’s weight gain. Moreover, despite the decline it causes, training and exercise can help reverse it and maintain your metabolism at healthy levels.
Nutrition: Nutrition is one of the most powerful drivers of your metabolism. When you reduce the calories you consume and enter into a calorie deficit, the state in which you burn more calories than you eat, your body will reduce its metabolic activities in two ways. First, it sheds muscle mass. This process occurs since muscles are one of your primary energy reserves that will be tapped upon to cover the calorie deficit caused by food restriction. Second, it makes your remaining muscle mass more economical, causing it to burn fewer calories when moving (e.g., walking). This is done by changing the balance of specific hormones that regulate the energy your cells burn during movement. Both processes are part of your body’s survival mechanism and kick in to conserve calories and help you close the energy deficit caused by restricting food intake. However, both can be averted with the correct dose and type of exercise.
Training: Training can affect your metabolism in the fastest and most acute way. Although it can be a powerful tool for increasing your metabolism, over-training can have the opposite effect. The most effective workout type for increasing your metabolism is resistance training. First, it increases your muscle mass, leading to more calorie burn as more active tissue requires more energy. Second, it increases the energy your muscles burn on a per unit basis, meaning that every pound of muscle mass starts to burn more due to a positive shift in the hormone balance regulating your cells’ energy consumption. Too much training, however, has been shown to cause an adverse change in hormone balance (e.g., reduction of growth hormone secretion) that reduces metabolic processes. In this case, metabolic decline and the associated decrease in recovery capacity pose a critical danger for injuries.