Group 1 included women who run ≥ 25 km a week; group 2 included women who run ≥ 25 km a week and practice yoga at least once a week; and group 3 included women who do physical exercise ≥ 3 times a week.
Hópur 1 voru konur sem hlaupa a.m.k. 25 km á viku og stunda jóga ≥ 1 sinni í viku; hópur 2 voru konur sem hlaupa ≥ 25 km á viku; hópur 3 voru konur sem stunda almenna líkamsrækt ≥ 3 sinnum í viku (almenningur).