what is metabolic age
Metabolic age is a comparison between a personâs basal metabolic rate (BMR) against the average BMR for an age. The calculation uses a benchmark, your age, to determine your bodyâs efficiency by comparing that benchmark against the average metabolic rate of different ages.etabolic age is a comparison between a personâs basal metabolic rate (BMR) against the average BMR for an age. The calculation uses a benchmark, your age, to determine your bodyâs efficiency by comparing that benchmark against the average metabolic rate of different ages.