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A new method for recording the temporal pattern of stride during treadmill running |
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| Authors: | Lennart Gullstrand Johnny Nilsson |
| Institution: | 1. Elite Sports Centre, Swedish Sports Confederation, 181 47, Bos?n, Liding?, Sweden 2. Section of Exercise Physiology, Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden 3. The Swedish School of Sport and Health Sciences, Stockholm, Sweden 4. Norwegian School of Sport Sciences, Oslo, Norway |
| Abstract: | The aim of this study was to investigate the reliability of a new infrared light based method (IR40) for recording temporal stride patterns during treadmill running. The IR40 device, emitting a tight web of 40 infrared light beams 10 mm above the treadmill running surface, was compared to a previously validated electro-pneumatic contact shoe (CS) method while nine well-trained athletes ran at 2.8, 3.3, 3.9, 4.4, 5.0, and 5.6 m s−1. Disconnection and reconnection of the IR beams marked the stance phase. The sampling rate was 500 Hz for both methods. The stance phase duration was on average 11.5 (±8.4) ms longer with the IR40 than with the CS depending on earlier touch down (8.3 ± 6.2 ms) and delayed toe off (3.2 ± 5.3 ms) registrations. Significantly different stance phases were recorded between all velocities and for both methods. Thus, despite the fact that the IR40 systematically measured a somewhat longer stance phase duration than CS, the IR40 is nonetheless useful for temporal stride analysis during treadmill running. |
| Keywords: | Infrared radiation mat Contact shoe Stride analysis Treadmill |
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