Goldman Sachs chief executive officer David Solomon has promised to ease workplace burnout and give junior staff one day off a week following a report that claimed they were facing "inhumane" working conditions. 

In a voice memo sent to the bank's 34,000 employees globally late Sunday, Solomon said he will "strengthen enforcement" of the Wall Street company's "Saturday rule."

The new policy means that staff will no longer work from 9 p.m. Friday to 9 a.m. Sunday except in certain conditions, so they can have at least one day off each week.

According to the report, created by a small group of freshman banking analysts in the U.S., they were doing 100-hour work weeks and facing abuse from superiors and colleagues that severely affected their mental and physical well-being.

The analysts have warned senior management they will resign within six months unless conditions in the workplace improve, an internal survey circulated online showed.

They submitted their report to Goldman Sachs' management last month and the bank has since taken steps to address the employees' dilemma, the bank said.

"We want a workplace where people can share concerns freely ... we want to encourage all of you to take the opportunity to speak with your management," The New York Post quoted Solomon as saying in the recorded message.

The report suggested Goldman staff are still struggling with the long hours and stressful culture that was exposed when 22-year-old analyst Sarvshreshth Gupta committed suicide in 2015.

Gupta was found dead after complaining of working 100 hours a week and working all night, The Guardian reported.