People aren’t hitting the gym just for the health benefits.

How many people someone has slept with is a personal thing that most don’t want to disclose — unless maybe you’re on a reality TV dating show like Love Island, where they created an entire challenge around the topic.

However, according to a Washington State University study, there is a simple way to determine if a person gets freaky in the sheets often — and it has to do with how much strength they have.

Lead researchers Caroline Smith and Ed Hagen analyzed data from 4,300 US participants. They found that people — both men and women — with upper body strength reportedly have a high number of sexual partners.

Couple embracing in bed.
People aren’t hitting the gym just to feel good.

It would be assumed that most people hit the gym to get strong and fit — little do they know that it could also be improving their sex lives.

“We found a main effect of strength on mating success proxied by lifetime number of sexual partners and current partnered status, but not past-year number of sexual partners or age at first intercourse,” the study abstract read.