The endurance training consisted of daily walking, which
gradually increased from 20 minutes to 45 minutes during the
intervention phase. The strength training took place twice a week
and consisted of 12 exercises for all major muscle groups. For the
first 3 months the focus was on strength endurance training and in
the latter 3 months on strength power. A health instructor was on
site once or twice a week for the endurance training but always on
site for the strength training. The intervention has been described
in detail previously [13].