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- Unick, J. L., et al.
(author)
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Four-Year Physical Activity Levels among Intervention Participants with Type 2 Diabetes
- 2016
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In: Medicine & Science in Sports & Exercise. - 0195-9131. ; 48:12, s. 2437-2445
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Journal article (peer-reviewed)abstract
- 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. © 2016 by the American College of Sports Medicine.
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| 2. |
- Unick, J. L., et al.
(author)
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Objectively Assessed Physical Activity and Weight Loss Maintenance among Individuals Enrolled in a Lifestyle Intervention
- 2017
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In: Obesity. - : Wiley. - 1930-7381. ; 25:11, s. 1903-1909
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Journal article (peer-reviewed)abstract
- Objective: To examine the relationship between objectively assessed moderate-to-vigorous intensity physical activity (MVPA) and 4-year weight loss (WL) and WL maintenance among individuals with diabetes enrolled in the Look AHEAD trial. Methods: MVPA was measured in a subgroup of lifestyle intervention participants with accelerometry data at baseline and at 1 and 4 years (n = 553; age: 59.7 ± 6.8 y; BMI: 35.5 ± 5.9 kg/m2). Minutes per week of bout-related MVPA were calculated (≥ 3 metabolic equivalents, ≥ 10-min bouts), and adherence to the national physical activity (PA) recommendation for WL maintenance (≥ 250 min/wk) was assessed. Results: Independent of 1-year WL, 4-year MVPA (β = −0.003, SE = 0.002, P = 0.006), but not 1-year MVPA (β = 0.0001, SE = 0.001, P = 0.50), was significantly associated with 4-year WL. Compared with “nonmaintainers” (≥ 10% WL at year 1, but < 10% at year 4; n = 132), WL maintainers (≥ 10% WL at years 1 and 4; n = 103) had higher MVPA at year 1 (253.4 ± 251.8 vs. 163.9 ± 158.2 min/wk, P = 0.002) and year 4 (155.3 ± 180.6 vs. 111.4 ± 154.5 min/wk, P = 0.046). Although 38.8% and 22.3% of WL maintainers engaged in ≥ 250 min/wk at years 1 and 4, respectively, many engaged in < 150 min/wk (year 1: 41%, year 4: 61%). Conclusions: Higher weekly MVPA is associated with greater long-term WL and weight maintenance; however, many individuals are able to maintain ≥ 10% WL while engaging in little MVPA. © 2017 The Obesity Society
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