She's 80 with the fitness level of a 60-year-old. Her routine is surprisingly simple.

Linda Kelly is 80 years old. She's as fit as someone decades younger and has an elite-level VO₂ max. Her easy daily habits ...
Verywell Health

We Asked a Doctor How to Improve Your VO2 Max

VO2 max is a measure of the maximum amount of oxygen the body can handle during intense exercise. A doctor explains how it's ...
IEEE

Non-Contact Optical Respiratory Rate and Heart Rate Monitoring Sensor Based on the Six-Hole High Birefringence Fiber

Abstract: In this paper, an optical respiratory and heart rate non-invasive monitoring sensor is set up and proven to work well. The core part of this sensor is an optical fiber Sagnac interferometer ...
IEEE

High-Sensitivity Transverse Load and Liquid Level Fiber Optic Sensor Based on a Lyot Filter With a Bend-Induced Linear Birefringence

Abstract: We present a numerical and experimental demonstration of a high-sensitivity fiber optic transverse load and liquid level sensor based on bend-induced linear birefringence in a single-mode ...