Recent reports indicate that 65% of the
adult population is overweight (BMI ³ 25) and 31% is obese (BMI ³
30). The potential benefits of weight loss are of great importance to public health.
Many studies indicate that individuals who lose weight in short-term weight
loss programs regain weight at the end of such interventions. The purpose of
this study was to examine weight change both during and after a 12-week
incentive-driven weight loss program. This
incentive-driven worksite program called “Waist Away” was implemented at a
small manufacturing company with 70 employees. The 12 week program involved
participants forming two to four person teams. Each participant was required to
pay a $5 registration fee. The team that lost the greatest percentage of their
combined total body weight at the end of the 12 weeks received $200. This
incentive was all of the registration money totaling $140 plus $60 provided by
the Human Resources Department. Participants attended four 30 minute seminars
that focused on the importance of physical activity, fluid intake, consumption
of complex carbohydrates, and fat reduction during the program. Participants
were weighed at the start of the program (PRE), at the conclusion of the
program (POST) and 12 weeks after the conclusion of the program (POST-POST).
Participants were never informed that the POST-POST data collection would take
place until the day of reweighing. This was to ensure that this reweighing would
not influence motivation for weight loss. A total of 20 employees (19 females,
1 male) out of a workforce of 70 completed the program. A one-way repeated measures ANOVA was calculated comparing the weight of
participants: PRE, POST, and POST-POST. A significant effect was found (F(2,38) = 22.36, p < .001). Follow up protected t-tests
revealed that weights decreased significantly from PRE (87.06 ± 23.17
kg) to POST (83.98 ± 23.32 kg) and again to POST-POST (82.91 ±
23.76 kg). In a similar manner BMI decreased significantly from PRE (31.53
± 6.73 kg/m2) to POST (30.41 ± 6.90 kg/m2)
and again to POST-POST (30.01 ± 7.08 kg/m2). Mean weight loss
was from PRE to POST was 3.08 ± 3.10 kg and 1.07 ± 1.88 kg from
POST to POST-POST. These results indicate that the use of monetary incentives
may increase motivation and help employees lose weight over a 12 week period.
Additionally, unlike many studies, this research shows that participants will
not always gain weight following a short-term intervention.