Flexible wearable biosensor for physiological parameters monitoring during exercising

Abstract

With the continuous improvement of the quality of life, people's demand for sports is gradually increasing, therefore, the monitoring of physiological parameters during exercise not only has the effect of improving the performance of athletes, but also provides a guarantee of the quality of training for the majority of sports enthusiasts.Monitoring blood oxygen saturation is essential for assessing a person's oxygen levels, and it can be achieved through electrochemical or optical methods. In this paper, we focus on the optical method, which utilizes a pulse oximeter equipped with an infrared light source and a light sensor. This device measures the absorption of light by hemoglobin, allowing the calculation of oxygen saturation. Flexible temperature biosensors are designed to measure environmental or object temperatures using thermosensitive materials or thermistors. The flexibility of these sensors allows them to adapt to irregular surfaces and curved shapes, making them suitable for monitoring human body temperature during exercise. Wearable heart rate monitors use various detection techniques, such as photoplethysmography (PPG) and electrocardiogram (ECG). PPG measures changes in blood volume using LEDs and photodiodes, while ECG detects the heart's electrical impulses. These monitors are widely used in fitness and sports settings, enabling users to track their cardiovascular health, adjust exercise intensity, and set performance goals. The incorporation of additional accelerometers or gyroscopes enhances heart rate monitoring accuracy during exercise, filtering out motion-induced noise for reliable data.