We were surprised how differently men and women write about sex.

He did a study, published in the on-line research journal POLS One in October, to look at how much energy is actually exerted during sex. Alaska and his colleagues recruited 21 young, heterosexual, committed couples from the local area and had them jog on treadmills for 30 minutes while researchers monitored their energy expenditure so they could compare it with the physical demands of sex.Then the scientists sent the couples home, instructing them to have sex at least once a week for a month while wearing the armbands.

Couples were asked to fill out questionnaires about how each session made them feel physically and psychologically, especially compared to as session running on the treadmill. When the researchers analyzed all of the results, it was clear, Alaska said, that sex qualified as “moderate exercise”. This is usually taken as a 6-MET activity for men and 5.6-MET activity for women, the equivalent of playing doubles tennis or walking uphill. Overall, Dr Alaska said, the data reveal that: 
Sex can be considered, at times, a significant exercise, worth encouraging in people who otherwise baulk at working out”ninety-eight percent of  Karolina volunteers reported that sex felt more fun than jogging. In her first tweet since eight-year-old Mathilda's accident, TV host Claudia told her 600,000 plus followers on Twitter "it will be a long road to recovery" but "she is getting the best possible care". "We are bowled over by their kindness and brilliance," Claudia said of the doctors and nurses.