Reference Equation for the Incremental Shuttle Walk Test in Healthy Adults

Dourado, Victor Zuniga; Jürgensen, Soraia Pilon; Iwama, Ângela May; Spagnuolo, Daniel Lucas; Freire, A.O.; Antunes, Letícia O.; Lucheta, Paulo Adolfo; Godoy, Irma

doi:10.1249/01.mss.0000355333.84448.9f

Cited by 2 publications

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“…We also observed that the walking tests commonly used for the evaluation of physical mobility, such as TUG and GS, are able to explain separately more than 40% of the variation of ISWT performance. These results are impressive, keeping in mind that we recently observed that demographic and anthropometric attributes such as age, gender, weight and height were jointly responsible for similar variability in ISWT (45.7%) [31] . In the same sense, Misic et al [32] observed in 55 community-dwelling older adults a significant correlation between TUG and VO 2peak (r = 0.46; p !…”

Section: Discussionsupporting

confidence: 71%

Walking for the Assessment of Balance in Healthy Subjects Older than 40 Years

Spagnuolo

Jürgensen²,

Iwama³

et al. 2010

Gerontology

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Background: The Berg scale and the timed ‘up and go’ test (TUG) are established measures to assess mobility in frail older adults. As an alternative to self-paced tests to assess aerobic exercise capacity, the incremental shuttle walk test (ISWT) was developed. We hypothesized that ISWT may be useful for the assessment of aerobic capacity and balance simultaneously in healthy adults. Objectives: There are 3 objectives: (1) to evaluate the intra-tester reliability of TUG in healthy subjects; (2) to compare the validity of TUG, ISWT and comfortable gait speed (GS) to evaluate balance assessed by the Berg balance scale, and (3) to evaluate the correlations among these walking tests. Methods: We studied a sample of 64 subjects (82.81% women) aged 40–84 years to assess the intra-tester reliability of TUG. Of these, 21 subjects also performed ISWT, GS and the Berg balance scale. We also assessed height, weight, body mass index, spirometry and reported physical activity. Results: The average time to complete TUG was 7.23 ± 1.27 s. The interclass correlation coefficient of TUG was excellent (0.936; 95% CI: 0.895–0.961). Age (r = 0.36), GS (r = –0.64), GS/height (r = –0.44), ISWT (r = –0.65) and the Berg score (r = –0.65) were correlated with TUG (p < 0.05). The Berg score was significantly (p < 0.05) correlated with GS (r = 0.61) and ISWT (r = 0.61). Moreover, ISWT was mutually related with GS (r = 0.68). We evaluated 2 models of linear regression, using GS and TUG as independent variables in each of them. In the 1st model, GS described 47% of the ISWT variability. In the 2nd, TUG described 42.7% of the ISWT variability. Conclusions: The capacity of walking is related to balance in healthy adults and seniors. Our results suggest the usefulness of ISWT as a new tool for the simultaneous evaluation of the aerobic capacity and balance in healthy subjects. An important part of the ISWT variation was explained by GS and TUG. Secondly, we confirmed the significant influence of age in the TUG performance and the excellent reliability of this field walking test.

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Section: Discussionsupporting

confidence: 71%

Walking for the Assessment of Balance in Healthy Subjects Older than 40 Years

Spagnuolo

Jürgensen²,

Iwama³

et al. 2010

Gerontology

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“…This may be attributed to physiological differences between walking (ISWT) and cycling. Although peak values of VO 2 , VE, and HR as well as HR and breathing reserves were described as similar between ISWT and cycling in patients with chronic obstructive pulmonary disease and in healthy subjects (8), the ISWT evoked a lower peak VCO 2 and blood lactate concentration than the incremental cycle ergometer test, suggesting a reduced contribution from nonaerobic metabolism to energy production. Besides that, the act of pedaling is not as familiar as walking, especially for older individuals.…”

Section: Discussionmentioning

confidence: 80%

“…This test is performed with a speed increase every minute imposed by audio signals until exhaustion. The normal peak physiological responses to the ISWT were recently described in adults older than 40 years (8). There is scarce information on dynamic physiological responses during walking.…”

Section: Introductionmentioning

confidence: 99%

Dynamic physiological responses to the incremental shuttle walk test in adults

2017

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Introduction: Understanding the normal dynamic physiological responses to the incremental shuttle walk test might enhance the interpretation of walking performance in clinical settings. Objective: To assess dynamic physiological responses to the incremental shuttle walk test and its predictors in healthy adults. Methods:We assessed the simultaneous rates of changes of Δoxygen uptake/Δwalking velocity (ΔVO 2 / ΔWV), Δheart rate/Δoxygen uptake (ΔHR/ΔVO 2 ), Δventilation/Δcarbon dioxide production (ΔVE/ΔVCO 2 ), and Δtidal volume/Δlinearized ventilation (ΔVT/ΔlnVE) during the incremental shuttle walk test in 100 men and women older than 40 years. Fat and lean body masses (bioimpedance) were also evaluated. Results: We found that the dynamic relationships were not sex-dependent. Participants aged ≥ 70 presented declines in ΔVO 2 /ΔWV slope compared to those aged 40-49 (215 ± 69 vs. 288 ± 84 mL.min-

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Reference Equation for the Incremental Shuttle Walk Test in Healthy Adults

Cited by 2 publications

References 0 publications

Walking for the Assessment of Balance in Healthy Subjects Older than 40 Years

Walking for the Assessment of Balance in Healthy Subjects Older than 40 Years

Dynamic physiological responses to the incremental shuttle walk test in adults

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