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Sex as Exercise
"As far back as the 1950s, couples have been asked to strap on monitors, blood-pressure cuffs, oxygen masks and other paraphernalia and copulate, to scientifically quantify the impacts of sex."

Ask Healthy Living: Does Sex Really Count As Exercise?
"It's everyone's favorite workout that doesn't feel like a workout. Sure, it gets your heart pumping and you'll likely break a sweat -- but does sex really live up to its calorie-torching reputation?"

The Health Benefits of Sexual Expression
"In 1994, the 14th World Congress of Sexology adopted the Declaration of Sexual Rights."

Sexual Frequency and Salivary Immunoglobulin A
"112 college students reported the frequency of their sexual encounters and were divided into four categories: none, infrequent (less than once a week), frequent (one to two times per week), and very frequent (three or more times per week)."

The Myth of 'Sexercise'
"Myth number 7: A bout of sexual activity burns 100 to 300 kcal for each participant."

10 Surprising Health Benefits of Sex
"Sex not only feels good. It can also be good for you. Here's what a healthy sex life can do for you."

What is exercise? The benefits of exercise
"When we talk about exercise, we nearly always refer to physical exercise."