My legs shake after sex. Is that normal?

If you’ve ever finished sex with shaky legs, you’re probably wondering what happened. But shaking and pelvic cramping after reaching orgasm is common for many women, according to Jessica Williams, MD, an OBGYN in Austell, Georgia.

To understand why, it helps to know how an orgasm affects your body. During climax, you experience myotonia, which is muscle contraction or tension, through much of your body. Once you relax those muscles, your legs might shake.

As for the pelvic cramping, it may be caused by a release of oxytocin, also known as the cuddle or love hormone. This can lead to uterine contractions and myotonia, which can affect muscles after orgasm, says Dr. Williams.

Manage the post-orgasm feeling

If you often cramp or shake after orgasm, try drinking a big glass of water. “The better hydrated the muscle is, the less painful the muscle contraction will be following orgasm,” Williams says. Snacking on some potassium-rich foods could help, too. Healthy potassium levels can decrease myotonia and the pain that comes with muscle contraction. Foods rich in potassium include bananas, avocados, dried fruit, and beans.

Your position during sex may have something to do with how you feel afterwards, too. Positions that require you to clench your muscles more could intensify shaking. “I would say avoid any position where you’re holding yourself up for a long period of time,” says Williams.

If you’re going to sleep right away, make sure your sleep position is comfortable and that you stretch out your muscles. “Any sort of stretching routine is good for your body overall, and the more fit you are to begin with, the less of the bad effects you'll probably feel,” says Williams.

How to know if it’s serious

In general, Williams says, a little shaking or pelvic cramping after sex is normal and you shouldn’t worry. “Most people notice a sense of well-being and a sense of peace that can last anywhere from 10 minutes to several hours after orgasm,” she adds.

If you have excessive bleeding or pelvic pain that doesn’t go away within a few hours, however, see a healthcare provider to rule out infections like chlamydia. Other possible causes of bleeding after sex are potential trauma to the genital area, a cervical polyp, or cervical cancer.

The bottom line? Everybody experiences orgasm and sex a little differently. “Know what your normal is, and if your legs do shake, be sure to hydrate,” Williams says. “And have fun!”