Which of the following would likely happen if a person’s lactic acid system had difficulty breaking down glycogen in the muscles? The person would have difficulty running a marathon.
The person would have difficulty sprinting in a race.
The person would have difficulty swimming across a lake.
The person would have difficulty cycling down a hill.

Life expectancy in the united states is (76.4 for men and 81.1 for women). life expectancy is not the same as healthy life expectancy. healthy life expectancy is the number of years a person is expected to live in this number is obtained by subtracting years spent in poor health from overall life expectancy. the world health organization (who) calculates healthy life expectancy in 194 countries. the united states ranks twenty-ninth in the world using this measurement, with an average of of healthy life expectancy. singapore ranks number one (76 years), and japan is number two (75 years).