Biophotonic Technique to Study Muscle Tissue Metabolism of Athletes

Introduction. Near Infrared Spectroscopy (NIRS) is one of the biophotonic techniques which can be used to monitor oxygenation and haemodynamics in a variety of human tissues, including skeletal muscle. Due to the differing light absorption properties of oxygenated haemoglobin (Hb02) and deoxygenated haemoglobin (HHb), in the near-infrared range of the electromagnetic spectrum (see Figure 1), shining light into the tissue can yield information relating to the concentrations of each form of the chromophore. This technique is entirely non-invasive, and provides real-time, in-vivo information relating to changes in oxygenation of the tissue. It also provides a measure of blood volume changes in the tissue, by reporting alterations in total concentration of Hb02 + HHb, to give a measure of total haemoglobin (tHb). NIRS has been used in a sports and exercise science setting for a number of decades, and has provided insights into changes in muscle oxygenation (StO2) during a wide range of exercise modalities [1]. The feasibility of conventional NIRS in monitoring the pattern of skeletal muscle chromophore changes during rest, isometric exercise and ischemia is reported by different investigators [2]. This paper will provide an overview and analysis of the new portable, wireless OxyPrem device based on NIRS in elite sport and potential its application in wrestling science. To maximize training for wrestling competition, coaches and wrestlers are interested in improving the physiologic capacities that are most important for successful performance. Under the present rules for international freestyle and Greco-Roman wrestling continues 5 min match without rest and multiple matches during the day require the certain level of aerobic capacity One of most important performance parameters are oxygen consumption (mVO2) and maximal aerobic power (VO2max) upper and lower body muscles of wrestlers. To measure VO2max need to use an incremental treadmill running protocol and gas exchange of CO2 and O2 on systemic level. But accepted methods to measure systemic aerobic power can not to reveal separate skeletal muscles performances of upper and lower body on local level. In the present work we are offering tissue oximetry (OxyPrem) to measure hemodynamic parameters of skeletal muscles (O2Hb, HHb, tHb, StO2, VO2, reoxygenation rate) in rest and exercise. Design of device. In Laboratory of Biomedical Optic (Neonatology Hospital of Zurich University, Switzerland) elaborated the new NIRS device (OxyPrem) for non-invasive measurement of localized tissue oxyand deoxyhaemoglobin concentration ([O2Hb], [HHb]) and tissue oxygenation (StO2) by means of near-infrared spectroscopy [3]. OxyPrem is specifically designed for the measurement of cerebral and muscle tissue oxygenation of brain and muscles. OxyPrem a continuous-wave (CW) near-infrared spectroscopy (NIR) device with a function principle similar to the wellknown and widely applied pulse oxymeters. Light in the near-infrared spectrum (NIR light), i.e. with a wavelength