Dynamics of thermographic skin temperature response during squat exercise at two different speeds |
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| Institution: | 1. Department of Biomedical Sciences for Health, Università degli Studi di Milano, Italy;2. Department of Physics, Università degli Studi di Milano, Italy;3. Metabolism Research Centre, IRCCS Policlinico San Donato Milanese, Milano, Italy;1. Catholic University San Antonio of Murcia (UCAM), Spain;2. Azienda Sanitaria Locale Nuoro, Hospital San Francesco, Italy;1. Institute of Health and Biomedical Innovation and School of Exercise and Nutrition Sciences, Queensland University of Technology, Brisbane 4059, Queensland, Australia;2. School of Exercise Science, Faculty of Health Sciences, Australian Catholic University, Melbourne 3065, Victoria, Australia;3. Extreme Environments Laboratory, Department of Sport and Exercise Science, University of Portsmouth, Portsmouth PO1 2ER, United Kingdom;1. Human Performance Laboratory – LAPEH, University Federal of Viçosa, MG, Brazil;2. Facultad de Ciencias de la Actividad Física y del Deporte – INEF, Universidad Politécnica de Madrid, Spain;3. School Physical Education, University Federal de Minas Gerais, BH, MG, Brazil;1. Theory of Sport Department, Józef Piłsudski University of Physical Education in Warsaw, Marymoncka 34 St., 00-968 Warsaw, Poland;2. Rehabilitation Department, Physiotherapy Division, Medical University of Warsaw, Księcia Trojdena 2c St., 02-091 Warsaw, Poland;3. School of Medical and Applied Sciences, Central Queensland University, Bruce Highway, North Rockhampton, QLD 4702, Australia;1. Applied Neuromechanics Research Group, Laboratory of Neuromechanics, Federal University of Pampa, Uruguaiana, RS, Brazil;2. Research Group in Sports Biomechanics (GIBD), Department of Physical Education and Sports, University of Valencia, Valencia, Spain;3. Research Group in Medical Physics (GIFIME), Department of Physiology, University of Valencia, Valencia, Spain;4. IIS Aragón-iHealthy, Faculty of Health and Sport Sciences, Department of Physiatry and Nursing, University of Zaragoza, Huesca, Spain |
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| Abstract: | Low intensity resistance training with slow movement and tonic force generation has been shown to create blood flow restriction within muscles that may affect thermoregulation through the skin. We aimed to investigate the influence of two speeds of exercise execution on skin temperature dynamics using infrared thermography. Thirteen active males performed randomly two sessions of squat exercise (normal speed, 1 s eccentric/1 s concentric phase, 1 s; slow speed, 5 s eccentric/5 s concentric phase, 5 s), using ~50% of 1 maximal repetition. Thermal images of ST above muscles quadriceps were recorded at a rate of 0.05 Hz before the exercise (to determine basal ST) and for 480 s following the initiation of the exercise (to determine the nonsteady-state time course of ST). Results showed that ST changed more slowly during the 5 s exercise (p=0.002), whereas the delta (with respect to basal) excursions were similar for the two exercises (p>0.05). In summary, our data provided a detailed nonsteady-state portrait of ST changes following squat exercises executed at two different speeds. These results lay the basis for further investigations entailing the joint use of infrared thermography and Doppler flowmetry to study the events taking place both at the skin and the muscle level during exercises executed at slow speed. |
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| Keywords: | Thermal imaging Blood flow restriction Thermoregulation Skin temperature Skin blood flow |
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