Professional footballers successful Scotland are to beryllium banned from heading the shot successful grooming the time earlier and the time aft a game.
Clubs are besides being told to bounds exercises that impact repetitive heading to 1 league per week.
The caller guidelines travel aft Glasgow University probe that showed erstwhile footballers were three-and-a-half times much apt to dice from encephalon disease.
Experts judge determination could beryllium a nexus to repetitive heading of the ball.
The Scottish Football Association (SFA) already has guidelines successful spot limiting heading successful younker football, with a prohibition connected headers successful grooming for the under-12 property group.
Scotland was besides the archetypal state successful the satellite to person a azygous acceptable of concussion guidelines for each sports, with the "If successful doubt, beryllium them out" campaign.
The caller guidelines are being introduced aft consultation with the 50 clubs crossed the nonrecreational men's and women's crippled successful Scotland and pursuing an SFA survey of clubs to gauge heading trends.
Clubs are besides being told to show heading enactment successful grooming with the purpose of reducing the wide load of contact.
Memory impairment
Dr John MacLean has been the SFA doc for much than 20 years and was progressive successful the 2019 tract survey that highlighted the nexus betwixt dementia and erstwhile nonrecreational players.
"While the probe continues to develop, what we already cognize astir heading and its effects connected the encephalon suggests that determination is measurable representation impairment lasting 24-48 hours pursuing a bid of headers, and that brain-related proteins tin beryllium detected successful humor samples for a abbreviated clip aft heading," helium said.
"Brain scan changes person besides been reported successful footballers that whitethorn beryllium linked to heading.
"Therefore, the extremity is to trim immoderate imaginable cumulative effect of heading by reducing the wide vulnerability to heading successful training."
The caller guidelines volition mean a alteration for galore grooming routines that impact set-piece exercises, the time earlier a match.
"We've taken our clip with this due to the fact that we wanted to truly prosecute with stakeholders crossed football," Dr MacLean said.
"We wanted to find conscionable however overmuch heading is taking spot successful grooming to get a baseline idea.
"Then determination was the engagement process with players, done PFA Scotland but besides with the clubs, the managers and coaches done the Scottish FA.
"It was each astir corporate work and safeguarding subordinate wellness and well-being."
In-match heading
Andy Gould, the SFA's main shot officer, said determination was already a large woody of information astir in-match heading.
But helium said the latest probe had been "invaluable successful knowing the grade of heading load wrong the grooming environment".
He added: "I americium grateful to the clubs, managers and players for providing america with the accusation and perspectives required to facilitate an informed and data-driven treatment which has culminated successful the work of guidelines designed to support the information and wellbeing of our players."
Earlier this year, the FA successful England introduced guidelines for clubs that limits players to 10 precocious interaction headers per week, during training.
A fig of high-profile erstwhile footballers person died from dementia successful caller years, including the erstwhile Celtic skipper Billy McNeill and erstwhile England World Cup victor and Republic of Ireland manager Jack Charlton.
There are immense carnal and intelligence benefits to playing football, but the steps taken successful caller years to trim heading successful the crippled reflects the increasing interest astir the subject that continues to nexus shot to semipermanent encephalon injury.
The constricted push-back from Scottish clubs, connected caller guidelines that could drastically alteration the mode players bid and managers coach, besides shows the connection is getting through.
When caller guidelines are introduced oregon caller studies published, it ever leads to the basal question "is heading a shot safe?"
The subject shows what is happening to erstwhile professionals, but truthful acold can't find why. The latest information shows the hazard is greater with defenders, who statistically caput much often.
For each of those reasons, the experts are taking nary chances.
It could instrumentality decades for caller measures to supply the information that volition pb to a definitive reply and subject is not consenting to wait.
The improvement of benignant and tactics has meant less headers successful the crippled anyway, but if the changes continue, owed to mounting technological grounds and pressure, it isn't hard to ideate a crippled of the aboriginal without them.