In households where the father is the sole breadwinner, his total workload exceeds that of his spouse or partner by roughly 11 hours (57 vs. 46 hours per week). (pewsocialtrends.org)
In households where the mother is the sole breadwinner, her total workload exceeds that of her spouse or partner by about 25 hours (58 vs. 33 hours per week). (pewsocialtrends.org)
Increasing the number of mitochondria, a process known as mitochondrial biogenesis takes the demand off of just 10 mitochondria and disperses the total workload among a hundred, which would enable them to do their job of transforming energy from fat into ATP to be used by the body more efficiently. (fitnessandpower.com)