Mitochondrial decline drives aging symptoms, experts say
Physicians explain how cellular energy loss impacts brain function and muscle mass, urging strength training to counter metabolic changes.
By Ivan Dvorak ·
Adults experiencing brain fog, fatigue, or reduced physical capability are likely feeling the effects of declining cellular energy. As the body ages, its metabolic processes change, altering how fuel is burned and how strength is maintained. Experts warn that these shifts impact daily function long before they affect weight or visible health markers.
Dr. Rhea Rogers, a board-certified physician, describes metabolism as the body’s power plant. She notes that mitochondria act as battery packs supplying energy to cells. When these power sources deplete, organs that require high energy outputs show symptoms first. Rogers explains that the brain and heart demand substantial power, so deficits in these areas lead to early cognitive or physical changes.
Gerontologist Sam Cradduck emphasizes that metabolism extends beyond weight management. He states that aging can be understood as a progressive loss of energy at the cellular level. This decline affects how the body processes medications and maintains basic functions. Rogers adds that when cells cannot produce required energy, individuals often experience a general state of being out of it.
Muscle mass plays a central role in this energy system. As people age, they often lose muscle and gain fat, a condition known as sarcopenia. Rogers explains that muscle tissue is responsible for taking up glucose from the blood. If muscles fail to absorb glucose, insulin resistance can develop, leading to prediabetes. Building more muscle helps improve this metabolic process and supports efficient energy use.
Aging expert Amy O’Rourke observes that many people focus on weight loss while neglecting strength. She recommends strength training two to three times per week to maintain muscle mass. O’Rourke advises younger individuals to begin training early to prevent a cascading decline in later years. She notes that gaining weight through muscle growth can be a positive sign of strength rather than a negative one.
Rogers points to metabolic inflexibility as another challenge in aging. She defines this as the body’s inability to switch between using fat and carbohydrates for energy. Toxins and inflammation can reduce this efficiency. She notes that type 2 diabetes is appearing at younger ages, partly due to this loss of metabolic adaptability.
Katherine Ambrose, an aging well coach, suggests focusing on creating health and energy rather than waiting to manage disease. Rogers lists specific actions to support metabolism, including muscle stimulation, inflammation control, toxin removal, good nutrition, and adequate sleep. These steps aim to keep the body’s energy systems functioning effectively as individuals age.
The experts agree that maintaining physical capability is more important than monitoring the scale. A healthy metabolism provides the strength needed to stay active. By understanding the role of mitochondria and muscle mass, individuals can take targeted steps to support their bodies' energy production throughout their lives.
