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Effect of aerobic exercise on physical performance in patients with Alzheimer's disease [with consumer summary]
Sobol NA, Hoffmann K, Frederiksen KS, Vogel A, Vestergaard K, Braendgaard H, Gottrup H, Lolk A, Wermuth L, Jakobsen S, Laugesen L, Gergelyffy R, Hogh P, Bjerregaard E, Siersma V, Andersen BB, Johannsen P, Waldemar G, Hasselbalch SG, Beyer N
Alzheimer's & Dementia 2016 Dec;12(12):1207-1215
clinical trial
7/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: Yes; Adequate follow-up: Yes; Intention-to-treat analysis: Yes; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

INTRODUCTION: Knowledge about the feasibility and effects of exercise programs to persons with Alzheimer's disease is lacking. This study investigated the effect of aerobic exercise on physical performance in community-dwelling persons with mild Alzheimer's disease. METHODS: The single blinded multi-center RCT (ADEX) included 200 patients, median age 71 yrs (50 to 89). The intervention group received supervised moderate-to-high intensity aerobic exercise 1 hour x 3/week for 16 weeks. Assessments included cardiorespiratory fitness, single-task physical performance, dual-task performance and exercise self-efficacy. RESULTS: Significant between-group differences in change from baseline (mean (95%CI)) favored the intervention group for cardiorespiratory fitness (4.0 (2.3 to 5.8) ml/kg/min, p < 0.0001) and exercise self-efficacy (1.7 (0.5 to 2.8) points, p = 0.004). Furthermore, an exercise attendance of > 66.6% resulted in significant positive effects on single-task physical performance and dual-task performance. DISCUSSION: Aerobic exercise has the potential to improve cardiorespiratory fitness, single-task physical performance, dual-task performance and exercise self-efficacy in community-dwelling patients with mild Alzheimer's disease.

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