Four-Year Physical Activity Levels among Intervention Participants with Type 2 Diabetes

作者：Unick Jessica L^*; Gaussoin Sarah A; Hill James O; Jakicic John M; Bond Dale S; Hellgren Margareta; Johnson Karen C; Peters Anne L; Coday Mace; Kitzman Dalane W; Bossart Suzette; Wing Rena R

来源：Medicine and Science in Sports and Exercise, 2016, 48(12): 2437-2445.

DOI：10.1249/MSS.0000000000001054

• EXERCISE
• LOOK AHEAD TRIAL
• LIFESTYLE INTERVENTION
• WEIGHT LOSS INTERVENTION

Physical activity (PA) has numerous health benefits, particularly for those with diabetes. However, rates of long-term PA participation are often poor. Purpose: This study examined the effect of an intensive lifestyle intervention (ILI) on objectively assessed PA for a 4-yr period among older adults with type 2 diabetes. Methods: Data from 2400 participants (age = 59.3 +/- 6.9 yr, body mass index = 36.1 +/- 5.9 kg.m(-2)) with accelerometry data from the Look AHEAD trial were included in the analyses. Participants randomized to ILI were instructed to reduce caloric intake and progress to >= 175 min.wk(-1) of moderate-to-vigorous-intensity PA (MVPA), whereas those randomized to Diabetes Support and Education (DSE) served as the control group. PA was measured at baseline, year 1, and year 4 using an RT3 accelerometer, and bout-related MVPA (PA >= 3 METs, accumulated in bouts of >= 10 min in duration) was calculated. Results: Despite no differences at baseline (ILI = 93.4 +/- 152.7 vs DSE = 88.4 +/- 143.6 min.wk(-1)), bout-related MVPA was significantly greater in ILI compared with DSE at year 1 (151.0 +/- 213.5 vs 87.5 +/- 145.1 min.wk(-1), P < 0.0001) and year 4 (102.9 +/- 195.6 vs 73.9 +/- 267.5 min.wk(-1), P < 0.001), and more ILI participants achieved >= 175 min.wk(-1) at year 1 (29.1% vs 16.3%, P < 0.001) and year 4 (18.3% vs 10.0%, P < 0.001). Forty-one percent of ILI participants who achieved >= 175 min.wk(-1) at year 1 maintained this threshold of PA at year 4. However, the majority of ILI participants never achieved the >= 175 min.wk(-1) threshold. Conclusions: When measured objectively and compared with DSE, ILI engaged in significantly more bout-related MVPA for a 4-yr period. However, future intervention strategies should target the large percentage of individuals who fail to reach the MVPA goal as result of a lifestyle intervention.

• 出版日期2016-12