A female swinger reportedly had a heart attack at Europe's largest sex festival after 'pushing herself too hard during group activities'.

The 52-year-old swinger is said to have suffered a medical episode during the secretive Swingfields festival in Malvern, Worcestershire, on Friday.

An air ambulance rushed the reveller to hospital, where she underwent emergency treatment and stayed as an inpatient for at least two days.

It is believed the woman suffered a heart attack after participating in group activities at the festival, which hosted a raunchy tug of war and jelly wrestling.

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(Image: SWNS.com)

(Image: Tristan Potter / SWNS)

A festival source told The Sun : "The swinger had a heart attack when the medics were on site. It gave the 700 swingers present a bit of a shock.

"But it didn’t take too long for the fun and games to resume . She’s now had a stent fitted in one of her blocked arteries and is making a recovery.

“There have been a few jokes about her overdoing it in the frenzy of camp activities.”

Drone pictures taken during the three-day festival showed a red double-decker party bus and a gazebo covering several double-beds.

(Image: SWNS.com)

The images also revealed large sex hammocks, big enough for several people to swing on, in the centre of the field and four poster beds dotted around the site - as well as mysterious tents and marquees in the corners of the field.

Paddling pools were also placed around the festival with a line of chairs set up nearby so that crowds can watch others make a splash.

Swingfields organisers have objected to the event being described as a sex party, claiming there is more sexual activity at other festivals.