Oxygen saturation measurements in athletes attaining maximal exertion conditions

Abstract

A b s l m r -M n i m a l effort ie,m are used io check thefitness rfnthlerer and to assess their statu.? <$,fhculth. Melcsuremrnrs pefttrmed durinR the rest ore also useful to andcrsrand arhlere phy>k,hrgy m d to optimise rhe training p mmrols. One of rhe interesting mea~uremenrr thot c m be perjbrmed is rhe m y ~e r i roturarion and derarumtion in bk~od uloaa b,irh cardiac rare. The l m k is gen saturation level during the effort and in the following recuperation phase, In addition, electrocardiography (ECG) sig.nal, blood pressure, and breathing exhaled gas analysis were recorded.

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“…The basis of the heart beat frequency selection is the observed high harmonic content of movement artifact signals with respect to the PPG-derived heartbeat. A preliminary version of the algorithm has been published, with off-line analysis of both the HR and oxygen saturation [22]. The present study optimizes the algorithm parameters for HR tracking and uses real-time probes.…”

Multi-wavelength transmittance photoplethysmography with near infrared laser diodes during exercise

“…Here we present the results obtained after the analysis of photoplethysmographic signals recorded in athletes along maximal exercise tests by treadmill ergometer, in comparison to the standard techniques. We used a new transmittance sensor based on three laser diodes (LD) emitting at near-infrared wavelengths (NIR), in a measurement system with a processing algorithm previously reported 10 .…”

Transmittance photoplethysmography and pulse oximetry with near infrared laser diodes

“…After the adaptation of the developed near-infrared laser diodes based system, an extended measurement campaign has been carried out [30] in a group of athletes in order to gain into the knowledge of the physiological mechanisms during the effort. There, it is a great interest to monitor the blood oxygen saturation during exercise in order to improve the sport training.…”

“…A method that comprises the non-linear filtering used in the developed oximetry system [25,26] with an off-line frequency domain analysis has been designed in order to obtain a valid value of the oxygen related parameter (q, Eq. 2) from the recorded photoplethysmographic signals [30]. The heart rates (beats per minute, bpm) obtained with the IMM laser diodes based system (IMM NIR-LD), the commercial LED based pulse oximeter and ECG are shown in figure 3.…”

“…Subsequently, we reported the development of processing algorithms [25,26], optical sensor improvements, calibration procedure modifications and comparison with a commercial pulse oximeter [27][28][29]. It has been followed by sensor adaptation and application of the system to the monitoring of peripheral and non-peripheral vascular beds [30][31][32]. In this work we present the study of athletes over stress tests and pig intra-peritoneal organs by transmittance photoplethysmography for pulse 1…”