SEX-ERCISE These are the sex positions which burn the most calories

ARE you looking to get trim for summer? Well forget the gym as these sex positions will help you blast the calories from the comfort of your own bedroom.

It's thought a 25-minute romp can burn around 100 calories - and that's sure to be a lot more fun than pounding the treadmill. InStyle spoke to clinical sexologist Sunny Rogers who gave her top five moves to try tonight...

These are the five sex positions which burn the most calories - and you may find some of them surprising

Missionary hip dips

Yep, you heard that right. Missionary's got a bit of a vanilla reputation, but adding a simple twist changes all that.

Instead of lying flat on the bed, ladies should tilt your hips up and forward, so your pelvis gets closer to his body every time he thrusts.

Engage your core and hip flexors, which allows you to burn more calories and strengthens your abs.

Not only is this a workout, it's also more enjoyable.

Spice up missionary position by adding a twist
“Engaging and squeezing the kegel muscles and lower abdominal muscles increases pleasure for both parties,” sex educator Bianca Alba told the mag.

The extra exercise increases your blood flow, making it easier to climax - and have a more intense orgasm.

Ladies normally only burn 44 calories on their backs, whereas men burn 143, but these moves will help boost these numbers.

And don't be afraid to make some noise - each moan burns five calories.