While many liken lovemaking to a workout, it doesn't match the intensity of rigorous sports, even during extended sessions.
For top performers, sex still falls short of a marathon or jogging at 8 km/h. Yet, a 2013 Quebec study found that this "indoor activity" outperforms walking at 5 km/h.
Researchers tested 42 heterosexual volunteers who ran on a treadmill for 30 minutes, then engaged in sex four times before returning. The study showed peak heart rates reaching 180 beats per minute. Men burned 9.2 calories per minute on the treadmill versus 4.2 during sex; women burned 7.1 versus 3.1.
Classified as light exercise, frequent sex—at least four times weekly—may halve heart attack or stroke risk. Contrary to myths, sex the night before competition doesn't impair performance and can reduce stress.
Energy expenditure during sex has intrigued scientists since the 1950s. In 1956, Dr. Bartlett noted orgasm triggers sharp heart rate spikes, alongside hyperventilation during arousal and climax.
Sources: Science & Vie – AlloDocteurs – ICI Radio Canada
