By Carina Stathis For Daily Mail Australia

Published: 22:40 EDT, 14 August 2022 | Updated: 02:33 EDT, 15 August 2022

A couple have demonstrated a 'simple' arm movement claiming women can perform the trick perfectly every time but men can't.  

In a now-viral TikTok video seen by millions, Jemmi, from San Diego, performs the movement by placing her forearms together in front of her face then slowly lowers them down. 

Beside her Jemmi's boyfriend Russ also attempts the same movement but struggles and is left with a gap between his arms. 

Jemmi (pictured left) performs the movement by placing her forearms together in front of her face then slowly lowers them down. Her boyfriend Russ also attempts the same movement but seems to struggle and is left with a gap between his arms (right)

To complete the movement, ensure both forearms remain touching even after the elbows have straightened. 

The key difference between Jemmi and Russ' arm movement was the fact that Russ had a gap between his forearms and Jemmi didn't. 

It's understood that most men can't perform the movement due to a difference in anatomy. 

According to the Institute of Human Anatomy, women's elbows, shoulders and joints differ in form compared to men so a woman can bend her arms a little further easily. 

Women have smaller shoulders and wider hips therefore the 'carrying angle' of the elbow and forearm is smaller to allow for effortless 'hip clearing' while walking.

Men and women have differences in biological anatomy.

Women's elbows and shoulders differ slightly compared to men, and so the arms can usually bend a little further with ease.

The joints of a woman's elbow may seem to poke out a little extra when the arms are extended.

It's believed this is why most men struggle performing the arm movement. 

Women have smaller shoulders and wider hips therefore the 'carrying angle' of the elbow and forearm is smaller to allow for effortless 'hip clearing' while walking. 

Source: Institute of Human Anatomy

The clip has since been watched more than 2.1million times and caused a debate among others, as some men said they can in fact perform the arm movement. 

'I can't do this I'm a girl,' one woman wrote, and a man added: 'I guess I'm a girl then, I'm a boy and l can do it.' 

Another man added: 'I can do that, but I am really skinny which is probably why.' 

While some men said they can do the movement, others deemed it to be 'impossible' and 'too difficult'. 

Earlier this year a competitive couple were left in hysterics after trying a 'simple' TikTok challenge women find easy but men can't complete.

Earlier this year star personal trainer Josef Rakich, 31, and his wife Maryam Matti, 33, both attempted to step over a broom handle while holding it close to the floor - with hilarious results

Star personal trainer Josef Rakich, 31, and his wife Maryam Matti, 33, both attempted to step over a broom handle while holding it close to the floor - with hilarious results.

While Maryam gracefully stepped over the pole Josef's feet appeared to be glued to the ground.

When he finally lifted his left foot he lost balance before giggling and failing the challenge and sharing the video with his 775,000 followers.

'At least I can p*ss standing up,' the famous New Zealand born personal trainer captioned the video.

Before his wife hit back with a passive aggressive quip of her own: 'At least I can actually get my dirty laundry in the basket and not next to it.'

The couple's attempts at the challenge quickly went viral, impressing their fans.

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