The fitness effect of sex life is surprising (adult novel about sex knowledge)

Some effects of sexual activity are equivalent to those of physical exercise.
Michael, professor of medicine at the University of Pennsylvania. "Sex is a form of physical exercise," says Cirigliano. As far as single sexual intercourse is concerned, it seems to do little to enhance a person's physical fitness. But please remember the revelation of the Egyptian pyramids: each stone is ordinary, but when put together they create a miracle on earth.
If you have sex three times a week (the average frequency for healthy couples), you can consume up to 7,500 calories in a year. This is equivalent to jogging 120 kilometers in a year, and the passionate effect of sex life is incomparable to jogging.
If the calories consumed by sexual intercourse per week can reach 10,000 calories, it is roughly estimated that this is equivalent to running from Beijing to Tianjin at a speed of 1.6 kilometers in ten minutes.
In addition to burning calories and thus achieving weight loss, sex can also help enhance physical strength. Michael pointed out: "During sexual arousal and orgasm, there is muscle contraction and relaxation. The higher the quality of sex, the better the effect of enhancing physical strength."
However, he cautioned against overindulgence, saying: "Like any intense physical exercise, excessive sexual activity can lead to damage, such as muscle fatigue."
For men, "any kind of physical exercise can increase testosterone." Karen, a clinical psychologist and head of the "Sex and Marital Adjustment" research project at Northwestern University School of Medicine. Donaghy believes that sex is no exception.
This magical male "nectar" has many benefits for physical and mental health. It maintains sexual drive and aids in the development of bones and muscles.
For women, "regular sex can increase estrogen levels." Karen emphasized that this hormone can protect women's hearts and maintain vaginal tissue. Regular sex can also help reduce or eliminate premenstrual syndrome in women.
Physical exercise can give people mental rest and thus relieve psychological stress. Karen said: "Sex can also be an effective way to reduce nervous tension." She believes that making love can help couples eliminate coldness and be full of joy, intimacy and relaxation.
Because psychological stress can weaken the human immune system, relieving this stress through sex can help people reduce disease.