By what percentage does resting metabolic rate (RMR) decline per decade for men?

Resting metabolic rate (RMR) typically declines at a rate of about 1 to 2% per decade in men. This gradual decline is influenced by several factors, including changes in body composition, hormonal shifts, and a decrease in physical activity associated with aging. As individuals age, they often experience a loss of lean body mass, primarily muscle, which is metabolically active tissue. This loss further contributes to the slowdown of metabolism, impacting the number of calories burned at rest.

Understanding this decline is essential for nutrition coaches and fitness professionals, as it highlights the importance of maintaining an active lifestyle and proper nutrition to mitigate the effects of this metabolic slowdown. It also emphasizes the need to adjust dietary intake and exercise regimens as clients age to maintain a healthy weight and overall well-being.