Low-intensity wheelchair training in inactive people with long-term spinal cord injury van der Scheer, Jan

Transcription

1 University of Groningen Low-intensity wheelchair training in inactive people with long-term spinal cord injury van der Scheer, Jan IMPORTANT NOTE: You are advised to consult the publisher's version (publisher's PDF) if you wish to cite from it. Please check the document version below. Document Version Publisher's PDF, also known as Version of record Publication date: 2015 Link to publication in University of Groningen/UMCG research database Citation for published version (APA): van der Scheer, J. (2015). Low-intensity wheelchair training in inactive people with long-term spinal cord injury [S.l.]: [S.n.] Copyright Other than for strictly personal use, it is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license (like Creative Commons). Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Downloaded from the University of Groningen/UMCG research database (Pure): For technical reasons the number of authors shown on this cover page is limited to 10 maximum. Download date:

2 Chapter 4 Can a 15 m-overground wheelchair sprint be used to 4 Jan W. van der Scheer Sonja de Groot Riemer J.K. Vegter Med Eng Phys 2014; 36:

3 Chapter 4 (PO) over a 15 m-overground wheelchair sprint test can be used to assess wheel- - based on stopwatch time (time and mean velocity over 15 m) and on PO (primary - r 2 p -1 2 p - r 2 p It seems that outcomes based on stopwatch time over a 15 m-over- ed wheel can be implemented in rehabilitation practice and research settings when 60

4 15 m-overground wheelchair sprint to assess anaerobic work capacity output outcomes over a Wingate-like sprint test in a wheelchair ergometer or roller - - Alternative tests and as such has been implemented in rehabil (r r 19 while others r In the It is not yet known how PO is expressed in a 15 m-overground sprint and whether

5 Chapter 4-7 which resembles time needed to complete a 15 m-over Able-bodied persons participated in this initial study on 15-m sprint outcomes - 25 on stopwatch time and PO over a 15 m-overground wheelchair sprint test can be used Participants N Table 1. N Characteristic a Fiso a a Measured when hands were on top of the handrim. Mean ± SD (range) Equipment 62

6 15 m-overground wheelchair sprint to assess anaerobic work capacity We used a custom-built stationary ergometer mensions were adjusted so that it matched as closely as possible the wheelchair used Protocol with ergometer propulsion and learning to maintain the same relative velocity between et al

7 Chapter or was unable to propel the wheel- Data processing 28 ) and analyzed using Statistics p r) and 2 ) were calculated between 15-m outcomes (time-15 p 64

8 15 m-overground wheelchair sprint to assess anaerobic work capacity 29 - p - either time-15 m or P5-15m as the independent variable (step 1) and combined in step PO (W) Push start Push stop Ppeak-15m Unilateral PO (W) Unilateral PO (W) Pstart -15m P5-15m Time (s) Figure 1. last data point representing the start angle plus 15 m in radians N. -50 P5-WAnT P30-WAnT Time (s) Figure 2. 30s-wheelchair ergometer sprint and of the over the 6 successive 5-s intervals of Win- 65

9 Chapter 4 All subjects (N -1 r and R 2 that were calculated between 15-m sprint r 2 p 2 = p between all outcomes (r p Table 2. N PO outcome Unilateral PO (W) -1 ) -1 ) 38.1 ± ±0.3* 3.1 ±0.4* 46.3 ± ±0.2* 2.1 ±0.4* ±71.6 N.A. 2.4 ± ± ± ± ± ±0.2* 1.5 ±0.3* Data in mean ±SD. Table 3. - N P30-WAnT P5-WAnT r R 2 r R 2 Time-15 m 0.38* 0.36* MeanVelocity-15 m a 0.42* 0.39* 0.59** 0.56** 0.62** 0.61** 0.69** 0.61** a Linear model without intercept 66

10 15 m-overground wheelchair sprint to assess anaerobic work capacity p -1 p 2 p 2 p 2 p 2 p 4 1 MeanVelocity-15m (m/s) Unilateral PO (W) Velocity (m/s) Time (s) m sprint WAnT 15m sprint WAnT P5-WAnT (W) Figure 3. Scatter plot of meanvelocity-15m N line representing the linear model used to study the relationship between the outcomes over a data range than can be 15,16, Time (s) Figure 4. the interval of the highest successive 5-s gate-based 30s-wheelchair ergometer sprint 67

11 Chapter P5-15m - P5-WAnT (W) Unilateral PO (W) Figure 5. - plotted indicating mean difference between the outcomes, while upper and lower lines indicate Table 4. Step 1 Time-15 m (s) P5-15m (W) ß p R 2 ß p R 2 Constant m-outcome Step 2 Constant m-outcome Step 2 Constant m-outcome a Step 2 Constant m-outcome a Measured when hands were on top of the handrim. Abbreviations: ß 2 5-s intervals of 15 m sprint. 68

12 15 m-overground wheelchair sprint to assess anaerobic work capacity over a 15 m-overground wheelchair sprint test can be used to assess wheelchair-spe- -1 (table r r r sively starting to propel an inherently unstable wheelchair while this is not required in - - in which

13 Chapter same conclusion as based on the linear model tested in this study: stopwatch time over r p - - during an interval with relatively low handrim velocities may stronger relate to -1 r p - 70

14 15 m-overground wheelchair sprint to assess anaerobic work capacity compared to P5-15m (also r over Pstart-15m and Ppeak-15m since P5-15m is determined identically to the widely 25 a more homogeneous and well-accessible group compared to non-athletic wheelchair by time-15 m and P5-15m (both p p ships between the tests in an able-bodied sample are similar in non-athletic wheel- - 8 and 27 We conclude that outcomes based on stopwatch time over a 15 m-overground sprint chair with an instrumented wheel can be implemented in rehabilitation practice and

15 Chapter 4-72

16 15 m-overground wheelchair sprint to assess anaerobic work capacity

17 Chapter

18 15 m-overground wheelchair sprint to assess anaerobic work capacity

19