Can keep you alert and sharpen your concentration.
a. stress response
b. exhaustion
c. resistance
d. none of the above

Look at the graph about the barriers to working out. what would 20 percent of the population report as a barrier for working out? inability to devote thirty minutes a day to working out lack of interest with creating a detailed workout schedule not having enough money to pay for yearly gym membership living in a community that does not have parks or a gym facility