Want better sex tonight? Sweat it out[together! Go out for a run, hike or bike ride together to boost your time as well as your libido. Not just do you want to have a great time and get some quality time together, you’ll be taking a big step towards better sex. Researchers say that just about any cardio workouts that'll boost your libido really work! Sexual activity and sexual satisfaction by stimulating healthy circulation and increased oxygen in the blood.