Experts Identify Five Common Habits That Harm Metabolism Without Notice
Many people believe that metabolism is solely determined by genetics or calorie intake, but daily habits significantly influence metabolic health. Dr. Liat Barzilai-Yosef, an internal medicine and endocrinology specialist at Meir Medical Center, highlights that prolonged sitting is a major modern habit damaging metabolism. Sitting for hours reduces muscle and fat tissue stimulation, leading to increased risks of insulin resistance, obesity, diabetes, hypertension, and cardiovascular diseases. Research shows that interrupting sitting with brief physical activity can moderate blood sugar and lipid spikes after meals. Dr. Barzilai-Yosef recommends breaking up sitting every hour with light movement such as stretching or walking.
Strength training is another often overlooked factor crucial for metabolism. Muscle mass naturally declines from age 40, accelerating around menopause in women and gradually in men, shifting body composition toward more fat and less muscle. Muscle tissue plays a vital role in glucose uptake and insulin sensitivity. While aerobic exercise improves cardiovascular health and weight control, it does not sufficiently stimulate muscle growth or maintenance. Studies confirm that resistance training twice weekly helps reduce fat mass and preserve or increase lean body mass, improving metabolic health.
Sleep quality and duration also profoundly affect metabolism. Sleep deprivation disrupts hormonal balance related to metabolism, insulin sensitivity, and appetite regulation, increasing the risk of obesity, diabetes, and cardiovascular disease. Fatigue often leads to increased consumption of caffeine, sugary drinks, and calorie-dense snacks. Experts advise adults to aim for at least seven hours of regular, quality sleep and to establish consistent sleep routines.
Dietary habits matter as well. Low intake of protein and dietary fiber can impair satiety, muscle maintenance, and glucose regulation. Fiber supports gut microbiota that influence weight and energy balance, while protein helps preserve muscle mass and moderates blood sugar responses. Eating protein and fiber before carbohydrates can reduce post-meal glucose and insulin spikes, especially in people with diabetes or prediabetes.
Finally, consuming excessive ultra-processed foods, such as snacks, industrial baked goods, sugary cereals, and ready meals, can disrupt metabolism. These foods often contain high levels of refined carbohydrates, low fiber, and unhealthy fats, causing rapid blood sugar and insulin increases. A controlled study found participants ate about 500 more calories daily and gained weight on an ultra-processed diet compared to a minimally processed diet. Experts recommend focusing on whole, less processed foods rich in protein and fiber to support balanced metabolism and weight regulation.
