The participants of the study were 254 football players from six of the 13 clubs that compete in Iceland’s top league, Pepsi-league, and either played for the first team, or the under 20s team.
Þátttakendur voru samtals 254 knattspyrnumenn og -konur sem komu frá sex af þeim 13 knattspyrnuliðum sem leika í Pepsí-deild karla og kvenna á Íslandi.