Material and methods
Subjects
The subjects were 27 female farmers (mean aged 42.9
years, sd 5.5), who took part in four occupationally
oriented medical rehabilitation courses in one Finnish
rehabilitation centre in 1992. All the subjects worked
on dairy farms. Their mean height and weight were 163 cm (sd 6) and 72 kg (Z”d 11). According to the body
mass index (BMI, kg/m ), 48% of the subjects were
slightly overweight (25