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|Title: ||Effects of wheel and hand-rim size on submaximal propulsion in wheelchair athletes|
|Authors: ||Mason, Barry S.|
van der Woude, Lucas H.V.
Lenton, John P.
Goosey-Tolfrey, Victoria L.
|Keywords: ||Wheelchair configuration|
|Issue Date: ||2012|
|Publisher: ||Lippincott, Williams & Wilkins / © American College of Sports Medicine|
|Citation: ||MASON, B. ... et al, 2012. Effects of wheel and hand-rim size on submaximal propulsion in wheelchair athletes. Medicine and Science in Sports and Exercise, 44 (1), pp. 126 - 134.|
|Abstract: ||Purpose: This study aimed to investigate the effects of fixed gear ratio wheel sizes on the physiological and biomechanical responses to submaximal wheelchair propulsion.
Methods: Highly trained wheelchair basketball players (N = 13) propelled an adjustable sports wheelchair in three different wheel sizes (24, 25, and 26 inches) on a motor-driven treadmill. Each wheel was equipped with force-sensing hand-rims (SMARTWheel), which collected kinetic and temporal data. Oxygen uptake (V·O2) and HR responses were measured with high-speed video footage collected to determine three-dimensional upper body joint kinematics.
Results: Mean power output and work per cycle decreased progressively with increasing wheel size (P < 0.0005). Increasing wheel size also reduced the physiological demand with reductions in V·O2 for 25-inch (0.90 ± 0.20 L·min-1, P = 0.01) and 26-inch wheels (0.87 ± 0.16 L·min-1, P = 0.001) compared with 24-inch wheels (0.98 ± 0.20 L·min-1). In addition, reductions in HR were observed for 26-inch wheels (99 ± 6 beats·min-1) compared with 25-inch (103 ± 8 beats·min-1, P = 0.018) and 24-inch wheels (105 ± 9 beats·min-1, P = 0.004). Mean resultant forces also decreased progressively with increasing wheel size (P < 0.0005). However, no changes in temporal or upper body joint kinematics existed between wheel sizes.
Conclusions: A greater power requirement owing to a greater rolling resistance in 24-inch wheels increased the physiological demand and magnitude of force application during submaximal wheelchair propulsion.|
|Description: ||This article is closed access.|
|Publisher Link: ||http://dx.doi.org/10.1249/MSS.0b013e31822a2df0|
|Appears in Collections:||Closed Access (Sport, Exercise and Health Sciences)|
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