The independent investigation, commissioned by the US Soccer Federation, has been carried out following last season's scandals in the American women's league NWSL.
That's when Sinead Farrelly and Mana Shim, former players in the league, came forward with allegations of harassment and sexual coercion earlier in their careers under coach Paul Riley.
Riley denied the allegations, but was fired by his club, the North Carolina Courage, and league commissioner Lisa Baird resigned.
But the problems were widespread and before the season was over, five out of ten coaches in the NWSL had either resigned themselves or been fired following allegations.
"Deeply rooted"
The independent investigation now states that emotional abuse and sexual harassment are systematic and affect several teams, players and coaches.
"Abuse in the NWSL is deeply rooted in a youth league culture that normalizes verbal abuse by coaches and blurs the lines between coach and player," writes Sally Q Yates, former U.S. Attorney General.
More than 200 people have been interviewed in the survey and several of the people have told about abuse.
"Unforgivable"
U.S. Soccer President Cindy Parlow Cone said in a statement:
"The abuse described is unforgivable and has no place on any playing field.
US Soccer is committed to doing everything in our power to ensure that all players – at all levels – have a safe and respectful place to learn, grow and compete.
The report puts forward a number of recommendations to prioritize the health and safety of the players.
Among other things, that all clubs must report abuse from coaches to the league and the association so that they cannot continue their abuse in other clubs.