EMG activity during positive-pressure treadmill running |
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| Affiliation: | 1. School of Human Movement Studies, University of Queensland, Brisbane, Australia;2. School of Sport and Exercise Sciences, University of Birmingham, Birmingham, England, United Kingdom;1. Neuromuscular Research Center, Department of Biology of Physical Activity, University of Jyväskylä, Finland;2. Turku PET Centre, Turku, Finland;3. Department of Physical Performance, Norwegian School of Sport Sciences, Oslo, Norway;4. Institute of Sports Medicine Copenhagen & Musculoskeletal Rehabilitation Research Unit, Bispebjerg Hospital, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark;5. Department of Orthopaedics and Traumatology, Turku University and University Hospital, Turku, Finland;1. Department of Physical Education, College of Sciences in Education, Yonsei University, Seoul, Republic of Korea;2. Department of Silver Industrial Engineering, College of Future Human Resource Development, Kangnam University, Yongin, Republic of Korea;1. Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA, USA;2. Department of Human Evolutionary Biology, Harvard University, Cambridge, MA, USA |
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| Abstract: | Success has been demonstrated in rehabilitation from certain injuries while using positive-pressure treadmills. However, certain injuries progress even with the lighter vertical loads. Our purpose was to investigate changes in muscle activation for various lower limb muscles while running on a positive-pressure treadmill at different amounts of body weight support. We hypothesized that some muscles would show decreases in activation with greater body weight support while others would not.Eleven collegiate distance runners were recruited. EMG amplitude was measured over 12 lower limb muscles. After a short warm-up, subjects ran at 100%, 80%, 60%, and 40% of their body weight for two minutes each. EMG amplitudes were recorded during the final 30 s of each stage.Most muscles demonstrated lower amplitudes as body weight was supported. For the hip adductors during the swing phase and the hamstrings during stance, no significant trend appeared.Positive-pressure treadmills may be useful interventions for certain injuries. However, some injuries, such as hip adductor and hamstring tendonitis or strains may require alternative cross-training to relieve stress on those areas. Runners should be careful in determining how much body weight should be supported for various injuries to return to normal activity in the shortest possible time. |
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| Keywords: | Locomotion Jogging Athletic Performance Rehabilitation |
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