Intense exercise like heavy squatting or deadlifting can lead to erectile dysfunction or pain during intercourse due to pelvic floor hypercontraction and reduced blood flow.

“In fact, one of the more common questions I got, and I consulted with a couple of exercise physiologists about this, and they confirmed that a lot of people who squat and deadlift heavy in the gym or even who just tense their pelvic floor when they're doing things like dumbbell curls or other exercises, and especially people who seem to do a lot of abdominal work, reported to me in the questions that they experienced things like erectile dysfunction, that they experienced things like pain during vaginal intercourse, that essentially they had created some sort of what sounds to me like a hypercontraction of the muscles in that area that were impeding all the things that they wanted, as either side effects or direct effects of exercise, because many people are exercising for aesthetic reasons and health reasons, but nowadays, it seems, especially on the male side...”