Here's a reason to lace up those sneakers that has nothing to do with fitting into your old jeans: exercise can improve your sex life. Shocking, we know. But before you start planning a chandelier-swinging routine, note that it's not about how your body looks or your ability to perform acrobatics. Regular movement enhances the less glamorous, behind-the-scenes functions that crank up desire and capacity for sex - like releasing arousal-promoting hormones and boosting circulation in the nether regions. And crucially, it gets your brain to stop sabotaging the whole endeavor.

The link between breaking a sweat and having great sex might seem obvious, but it's not as linear as you'd think. Two main ways exercise upgrades your sex life: your body gets better at arousal, and your mind becomes less likely to interrupt it. Physically, it's all about circulation. Good blood flow underpins arousal: it promotes fluid-secreting glands and sensation-conducting nerves in women, and facilitates erections in men. Exercise also improves sleep, which boosts energy. Certain activities strengthen pelvic floor muscles, enhancing satisfaction for both genders, and positively influence the hormones and neurotransmitters tied to sexual response.

Scientists measure sexual function through various metrics - desire, arousal, lubrication (in women), erection (in men), ability to orgasm, and overall satisfaction. A recent review of multiple studies found that women who exercised - cardio, yoga, pelvic-floor work - scored significantly higher across these domains than sedentary women. These were randomized controlled trials, so they actually differentiate exercise effects from the pre-existing sex habits of gym-goers. Men show similar positive effects, though the studies are a bit spottier.

Psychologically, exercise improves mood, energy, and body image. Chronic stress and a self-critical mind interfere with arousal, though differently for men and women, notes Debby Herbenick, psychologist and director of Indiana University's Center for Sexual Health Promotion. Exercise isn't a magic fix for body anxiety, but it can, as Herbenick says, "decrease cognitive distractions and enhance arousal and orgasm."

What type of exercise? For physical benefits, aerobic exercise - the sweat-inducing, heart-pumping kind - has the best evidence, mainly because it's been studied the most. But for psychological perks, it's less about the activity and more about how it makes you feel. Choose exercises you enjoy, not ones that feel like a chore, to boost self-image and minimize arousal killers like stress. Herbenick advises picking "the exercises that they enjoy rather than try to choose an exercise just to enhance arousal or orgasm."

Timing matters, but not in the way you'd think. Cindy Meston, a sex researcher at the University of Texas at Austin, found in lab studies that women's genital blood flow is suppressed right after vigorous exercise, then spikes above baseline 15 to 30 minutes later, once muscles stop hogging blood. Herbenick's research corroborates this, but she admits structuring your sex life around workouts "is not realistic for everyone."

Intensity matters more than timing. Low-intensity or low-repetition exercise has little effect, but pushing too hard can backfire. Aim for the middle range - if it leaves your whole body aching, it's less likely to turn you on. And you don't need to overthink it. Moving regularly, with some effort, in a way that feels good and sustainable is enough. Real life is messy; exercise might mean swimming laps or pacing the soccer field during kids' practice, says Herbenick.

Exercise has been proven to improve sexual function in women on anti-depressants and those who've had hysterectomies. Even people exercising for other health reasons can earn sexy dividends: diabetes and heart disease impair the same blood vessels and nerves arousal depends on, so exercise prescribed for those conditions often improves sexual function as a side effect.

If you're an athlete training hard, communication with your partner is key, says Herbenick. Be honest about when you actually have the energy and comfort for sex, rather than assuming your body will cooperate on cue.