No matter how much your partner pleads, you cant substitute time in the sack for time on the treadmill. However, certain sex positions do work a womans muscle groups — some so much, in fact, that you might not be able to make it to the gym the next day.

No matter how much your partner pleads, you cant substitute time in the sack for time on the treadmill. However, certain sex positions do work a womans muscle groups — some so much, in fact, that you might not be able to make it to the gym the next day.

Original article and pictures take https://fitnessmagazine.com site