You already know that exercise makes you look and feel sexier. But did you know that exercise, quite literally, makes you sexy? After a good workout, men and women alike experience a spike of testosterone (the famed "pump" of bodybuilding), the hormone that influences sexual arousal. And sex itself can be a decent workout. While you can't substitute your mattress for your treadmill (a 125 pound woman burns about 30 calories during a 20 minute session of moderately intense lovemaking), sex works your core muscles, your glutes ‑- even your upper body, if you spend time on top.

Exercise and sex are definitely related. The more you have of the former, the more you'll want the latter! To make the sex you have that much better, you can train for "peak performance" just as you would train for optimal performance in a sport. The program below targets the needs of a sexual athlete. Try it and see if you can achieve your own "personal best."

Build Cardio Stamina

You already do aerobic workouts for weight loss and cardiovascular health, but there are other excellent reasons to make the commitment. First, stress is a major libido killer for women. Regular cardio sessions (at least three times a week) of at least 30 minutes have been shown to improve mood and reduce tension. Second, pushing your endurance can pay off during lovemaking. As we all know, women take time to reach orgasm. To keep the action going long enough for you to reach your climax, it helps to have some extra stamina. Furthermore, if you've been something of a junior partner in the bedroom, your man will also appreciate having you do "some of the work" or even taking the lead! Not only will you both enjoy it, you may burn some extra calories too.