What really happens to your heart rate during SEX? Woman wears Fitbit for a nine-minute session... from putting on the condom to taking a breather after orgasm

  •  Reddit user Jess, from America, wore her Fitbit during sex
  •  The gadget recorded peaks and drops in her heart rate over nine minutes
  •  She posted her results on Reddit and felt it was 'beautiful'

A woman used her exercise gadget to monitor her heart rate during sex with her partner and posted it online after finding the results 'beautiful.'

The user Noveltysin, believed to be American, posted the data from her Fitbit on Reddit which showed her knees collapsing, position change-ups and several orgasms during sex.

It lasted 8 minutes 59 seconds and her post has caused many Reddit users to target Jess accusing her of being unfit, mocking her partner's endurance and calling it 'more offensive' than porn.

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The Fitbit data shows Jess's heart rate rising and falling over the eight minutes

The Fitbit data shows Jess's heart rate rising and falling over the eight minutes

The post on the Reddit sub-thread Data is Beautiful has caused a flurry of interest with 1,760 comments and 1,887,315 views on the post.

The user, known as Jess, said the wrist-worn gadget started tracking her heart rate after 20 minutes of foreplay.

She told website Mic: 'I was curious about my heart rate during sex. So really, [I did it] for science.'

'When I checked the readout I was amazed about how I could correlate the spikes and valleys to actual actions.'

Many people praise Jess' idea and are planning to try out their own Fitbit in the bedroom.

One user said: 'I can't wait to try this! First I'll need a Fitbit. Then a volunteer...'

But the thread is also full of those putting the knife in to judge her sex life with her partner.

Despite this Jess posted on Reddit that she doesn't feel she has to defend hersel.  

Jess stood up for herself against a 'bunch of strange dudes' commenting on her sexlife

Jess stood up for herself against a 'bunch of strange dudes' commenting on her sexlife

Some posters were disgusted and called Jess a s*** and described it as 'more offensive' than porn

Some posters were disgusted and called Jess a s*** and described it as 'more offensive' than porn

One poster felt he should critique Jess' performance and told her to 'work on that'

One poster felt he should critique Jess' performance and told her to 'work on that'

She wrote: 'Now I've got to defend my orgasm to a bunch of strange dudes. Wait, no I don't.'

Many of the posters decided they could comment on her sex life.

One poster writes: 'Looks like you couldn't last more than a minute on top in two 30 second riding sets. You really need to work on that.' 

Many were quick to poke fun at the eight minute timescale.

With one writing: 'Eight minutes? Oh honey...'

The Fitbit watch is worn on the wrist and monitors the wearers heart rate and fitness
Reddit users have reacted to the graph with many judging Jess' sex life although some want to try out thier own Fitbit in the bedroom

The Fitbit watch, left, is worn on the wrist and monitors the wearer's heart rate and fitness... though most people use it for more common keep-fit activities instead of antics in the bedroom (photo posed by models)

And another saying if that time is considered long by many of the commenters he is 'overachieving' for once.

Jess wrote on Reddit: 'Everyone focuses on the time. I lose track of it. Time stops. I'm happy.'

There's no shortage of judging comments with another writing that she should not be sharing her sex life with the world.

One poster said: ''Hmm, I'm going to share with the world the specific details of my sex,' some kind of s*** you are.'

Another claimed to be 'angry and offended' by the graph.

They write: 'This seemed somehow more offensive than porn.' 

These posters were positive about trying it out for themselves... while one called Jess's partner 'Olympian'

These posters were positive about trying it out for themselves... while one called Jess's partner 'Olympian'

One person joked they'd found their new 'fetish' of finding stranger's Fitbit sexual encounters online.

While another seemed to be mocking Jess' boyfriend's prowess in the bedroom by calling him an Olympian.

And one claims it must be fake because she couldn't possibly have reached orgasm before her partner.

Jess told Mic the comments reflected the 'general mood that women can't have quick, enjoyable sex without it being fake or a ploy.' 

Plenty of Reddit posters poked fun at their own lovemaking in the comments thread

Plenty of Reddit posters poked fun at their own lovemaking in the comments thread

One poster is not impressed by Jess's boyfriend's performance time and sarcastically writes 'Oh honey'...

One poster is not impressed by Jess's boyfriend's performance time and sarcastically writes 'Oh honey'...

...while this man was thrilled to find out he is 'overachieving' in the bedroom

...while this man was thrilled to find out he is 'overachieving' in the bedroom

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