AMAZON workers have described the "hellish" conditions inside the company's warehouses where they are reportedly made to hit "crushing" targets.

Staff at the web giant have said they are forced to perform cult-like chants in conditions set by the world’s richest man.

2 A sign welcomes new starters at the Amazon Fulfilment Centre Credit: Getty Images - Getty

Undercover investigation reveals exhausting target-driven conditions inside the Amazon warehouse

Speaking to The Sydney Morning Herald one worker said: "It’s a hellscape.

"I’ve never worked anywhere as harsh, and it’s frustrating because the head of Amazon is the richest man on the planet."

Amazon's founder Jeff Bezos has recently been named the richest person in the world.

Another added: "You end up not being able to function because you’re so nervous and stressed out."

Amazon worker squats and poos on customer's driveway outside his home in Sacramento, California

2 The Melbourne warehouse is at the centre of poor working condition claims Credit: Getty Images - Getty

After Amazon opened a "fulfilment centre" in Melbourne workers describe how the day begins with group stretching exercises.

They reportedly have to share an 'Amazon success story' before managers are said to lead chants of "quality", "success", "Amazon" or "Prime".

The report states they are sometimes made to jump in the air.

Workers are then said to be given a scanner which gives them a countdown, showing how much time they have to reach their next item.

They get marked down if they don't reach the item in time, according to workers.

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An Amazon spokeswoman told the paper the company "set productivity targets objectively, based on previous performance levels achieved by our workforce", and that workers' performance was evaluated over a "long time".

The company also said workers were allowed to use the toilet "whenever needed" despite accusations toilet breaks would affect workers’ pick rate.

Most of those who work there are casual employees employed by a third-party labour hire firm called Adecco.

Amazon's spokeswoman said they have a culture based on safety and a positive working environment.

A spokeswoman for Adecco said it took the health and safety of its "associates" seriously, and that their welfare was its "number one priority".

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