How much exercise do you get in a day? How about in a week? If you think the amount is too low, you're not alone. Less than 5 percent of adults engage in 30 minutes of physical activity per day, and only one-third of adults achieve the recommended amount of 150 minutes of physical activity per week.

However, adults who do keep up with routine workouts may see surprising benefits. One University of California study indicated that, for men, daily exercise significantly improved the "frequency of various intimate activities, the reliability of adequate functioning during sex, [and the] percentage of satisfying orgasms."

Women experience similar benefits.