Swap the gym for the bedroom and limber up to impress your lover with these athletic positions, accompanied by easy-to-follow illustrations and plenty of tips and tricks to help you maximize your sexual and physical pleasure. Whether you're down for an intense quickie or an all-night marathon, all the guidance you need to get your heart rate going is here.

Designed to target a range of muscle groups, each position is accompanied by exercise stats showing you which muscles you are working, as well as intensity ratings to choose the right difficulty level for you and your partner. Tailored sex sessions will give you a workout plan for whatever mood you're in - or take your pick from the random position selectors for some flexible fun.

You'll never want to skip your workout again when it feels this good!