Research on the determinants of exercise behaviour has not assessed th
e role of personal goals which may be in conflict with exercising. A c
ross-sectional study showed that 312 nonexercisers, 466 people who exe
rcised once or twice a week, and 202 people who exercised at the norm
of ar least three times a week differed significantly with respect to
the number of important personal goals expected to be hampered by exer
cising at the norm. To be specific, the number of competing activities
in the home was higher for the sedentary group than for those who exe
rcised. Further, those who exercised at the norm reported fewer compet
ing social activities than all other subjects and fewer competing self
-developmental activities than the nonexercisers. Scores on the scale
for activities outside the home did not differ significantly among the
three groups. II is argued that any theoretical model of exercise beh
aviour should take into account the influence of competing personal go
als on the initiation and continuation of exercise during leisure lime
.