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Intensifying Functional Task Practice to Meet Aerobic Training Guidelines in Stroke Survivors. | LitMetric

AI Article Synopsis

Article Abstract

To determine whether stroke survivors could maintain workloads during functional task practice that can reach moderate levels of cardiometabolic stress (i.e., ≥40% oxygen uptake reserve ([Formula: see text]OR) for ≥20 min) without the use of ergometer-based exercise. Cross-sectional study using convenience sampling. Research laboratory in a tertiary rehabilitation hospital. Chronic hemiparetic stroke survivors (>6-months) who could provide consent and walk with or without assistance. A single bout of intermittent functional training (IFT). The IFT protocol lasted 30 min and involved performing impairment specific multi-joint task-oriented movements structured into circuits lasting ~3 min and allowing 30-45 s recovery between circuits. The aim was to achieve an average heart rate (HR) 30-50 beats above resting without using traditional ergometer-based aerobic exercise. Attainment of indicators for moderate intensity aerobic exercise. Oxygen uptake ([Formula: see text]O), carbon dioxide production ([Formula: see text]CO), and HR were recorded throughout the 30 min IFT protocol. Values were reported as percentage of [Formula: see text]OR, HR reserve (HRR) and HRR calculated from predicted maximum HR (HRR), which were determined from a prior maximal graded exercise test. Ten (3-female) chronic (38 ± 33 months) stroke survivors (70% ischemic) with significant residual impairments (NIHSS: 3 ± 2) and a high prevalence of comorbid conditions (80% ≥ 1) participated. IFT significantly increased all measures of exercise intensity compared to resting levels: [Formula: see text]O (Δ 820 ± 290 ml min, < 0.001), HR (Δ 42 ± 14 bpm, < 0.001), and energy expenditure (EE; Δ 4.0 ± 1.4 kcal min, < 0.001). Also, mean values for percentage of [Formula: see text]OR (62 ± 19), HRR (55 ± 14), and HRR (52 ± 18) were significantly higher than the minimum threshold (40%) indicating achievement of moderate intensity aerobic exercise ( = 0.004, 0.016, and 0.043, respectively). Sufficient workloads to achieve moderate levels of cardiometabolic stress can be maintained in chronic stroke survivors using impairment-focused functional movements that are not dependent on ergometers or other specialized equipment.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5662635PMC
http://dx.doi.org/10.3389/fphys.2017.00809DOI Listing

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