OBJECTIVE: This study tested the efficacy of an 8-week culturally targeted nutrition and physical activity intervention on body composition. METHODS: A randomized, attention-controlled, two-group trial was conducted in a blackowned commercial gym with a sample of 366 predominantly healthy, obese African American women. A free 1-year membership to the study site gym was provided to participants in both groups. Data were collected at baseline, 2, 6, and 12 months. RESULTS: Sample retention at 1 year was 71%. Between-group longitudinal analysis including only participants with complete data revealed a trend toward weight stability in the intervention group at 2 months compared with controls (+0.05 kg/m(2), p = 0.75; +0.32 kg/m(2), p = 0.08, respectively), disappearing at 12 months (+1.37 kg/m(2), p = 0.0001; +1.02 kg/m(2), p = 0.001, respectively). Within-group analysis demonstrated that intervention and control participants' fitness (1-mile run-walk) improved by 1.9 minutes (p = 0.0001) and 2.3 minutes (p = 0.0001), respectively, at 12 months. Mixed model regression analyses demonstrated a significant main effect of the intervention on fitness (p = 0.0185) and a marginally significant effect on body mass index (BMI) (p = 0.057), at 2 months, disappearing by 6 months. By 12 months, however, the controls exhibited a significant advantage in waist circumference stability compared with intervention participants (+1.1 cm, p = 0.2763; +2.1 cm, p = 0.0002, respectively). CONCLUSIONS: The intervention produced modest short-term improvements in body composition, but the economic incentive of a free 1-year gym membership provided to all participants was a more potent intervention than the education and social support intervention tested. However, longer-term fitness enhancement remains elusive and demands research and policy attention. These findings have policy implications in that employer-/insurer-subsidized gym memberships may require interventions targeting other levels of change (e.g., physical or social/environmental) to foster sustainable fitness improvements.
RCT Entities:
OBJECTIVE: This study tested the efficacy of an 8-week culturally targeted nutrition and physical activity intervention on body composition. METHODS: A randomized, attention-controlled, two-group trial was conducted in a blackowned commercial gym with a sample of 366 predominantly healthy, obese African American women. A free 1-year membership to the study site gym was provided to participants in both groups. Data were collected at baseline, 2, 6, and 12 months. RESULTS: Sample retention at 1 year was 71%. Between-group longitudinal analysis including only participants with complete data revealed a trend toward weight stability in the intervention group at 2 months compared with controls (+0.05 kg/m(2), p = 0.75; +0.32 kg/m(2), p = 0.08, respectively), disappearing at 12 months (+1.37 kg/m(2), p = 0.0001; +1.02 kg/m(2), p = 0.001, respectively). Within-group analysis demonstrated that intervention and control participants' fitness (1-mile run-walk) improved by 1.9 minutes (p = 0.0001) and 2.3 minutes (p = 0.0001), respectively, at 12 months. Mixed model regression analyses demonstrated a significant main effect of the intervention on fitness (p = 0.0185) and a marginally significant effect on body mass index (BMI) (p = 0.057), at 2 months, disappearing by 6 months. By 12 months, however, the controls exhibited a significant advantage in waist circumference stability compared with intervention participants (+1.1 cm, p = 0.2763; +2.1 cm, p = 0.0002, respectively). CONCLUSIONS: The intervention produced modest short-term improvements in body composition, but the economic incentive of a free 1-year gym membership provided to all participants was a more potent intervention than the education and social support intervention tested. However, longer-term fitness enhancement remains elusive and demands research and policy attention. These findings have policy implications in that employer-/insurer-subsidized gym memberships may require interventions targeting other levels of change (e.g., physical or social/environmental) to foster sustainable fitness improvements.
Authors: Chanita Hughes Halbert; Scarlett Bellamy; Vanessa Briggs; Marjorie Bowman; Ernestine Delmoor; Shiriki Kumanyika; Rodney Rogers; Joseph Purnell; Benita Weathers; Jerry C Johnson Journal: J Community Health Date: 2014-02
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Authors: Chanita Hughes Halbert; Scarlett Bellamy; Vanessa Briggs; Ernestine Delmoor; Joseph Purnell; Rodney Rogers; Benita Weathers; Jerry C Johnson Journal: Health Educ Res Date: 2017-06-01
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Authors: Nancy T Artinian; Gerald F Fletcher; Dariush Mozaffarian; Penny Kris-Etherton; Linda Van Horn; Alice H Lichtenstein; Shiriki Kumanyika; William E Kraus; Jerome L Fleg; Nancy S Redeker; Janet C Meininger; Joanne Banks; Eileen M Stuart-Shor; Barbara J Fletcher; Todd D Miller; Suzanne Hughes; Lynne T Braun; Laurie A Kopin; Kathy Berra; Laura L Hayman; Linda J Ewing; Philip A Ades; J Larry Durstine; Nancy Houston-Miller; Lora E Burke Journal: Circulation Date: 2010-07-12 Impact factor: 29.690