South Korea’s human rights commission plans to interview possibly thousands of adult and child athletes about a culture of abuse in sports after a wave of female athletes came forward to allege they had been raped or assaulted by their coaches.

The year-long investigation will cover 50 sports and include children competing from primary schools upwards, Park Hong-geun, an official from the National Human Rights Commission, said on Wednesday.

He said the commission aimed to interview all minor and adult athletes competing for scholastic and corporate league teams in speedskating and judo, which have been marred by sexual abuse allegations.

The investigation, pushed by dozens of government officials and civilian experts, could start as early as next week and could extend beyond a year if needed. It will be the commission’s largest-ever inquiry into sports.

“Education processes will be a key part of the investigation because there are situations where athletes find it hard to disclose what they have been through or even recognise they had been abused or sexually harassed,” Park said. “We will have to discuss with the schools and teams to figure out how to proceed with the investigation in each sport, but we plan to build it mostly around face-to-face interviews.”

South Korean competitive sports in recent weeks have been hit by a growing MeToo movement, which highlighted a brutal training culture and highly hierarchical relationships between coaches and athletes.

It began with two-time Olympic short-track speedskating champion Shim Suk-hee accusing her former coach of repeatedly raping her since she was 17. The coach, Cho Jae-beom, was the national team coach shortly before the Pyeongchang Olympics last year and is now serving a 10-month prison term for physically assaulting athletes, including Shim. Cho’s lawyers said he denies sexually assaulting Shim.

A group representing speed skating athletes said on Monday there were at least five more female skaters saying they were sexually abused by their male coaches, but did not reveal their names because of privacy concerns. Encouraged by Shim, female athletes in judo, taekwondo, football and wrestling have also accused their male coaches of sexual harassment or assault since.

Experts say abusive treatment of female athletes has long been a problem in South Korea’s elite sports, which are predominantly run by men. Athletes often skip school to compete in athletic events and must live in dormitories, giving coaches often-overbearing control and leaving athletes undereducated and more vulnerable. South Korea has long associated national pride with achievement in the Olympics and other international sporting events, leaving problems overlooked as long as the athletes succeed.

After a previous inquiry into school sports, the human rights commission in 2010 recommended safeguards to the Korean Sport and Olympic Committee (KOC), including instructions and proposals for preventing abuse and providing better education. Choi Young-ae, the commission’s chairwoman, criticised the KOC for ignoring the guideline for years, which she said worsened the abuse athletes face today.

“Physical and sexual violence in [South Korean] sports does not happen incidentally, but is generated consistently under a structure,” she said in a news conference on Wednesday. “A culture that puts medals and other awards over everything else has been exonerating violent behaviours and such violence has been closely associated with the sexual violence that occurs.”