Time magazines list of best health inventions for 2023

For those self-measurers who obsess about their heart rate variability, the range being a sizeable 20-200 milliseconds, the larger the variability the more adept we are at dealing with stress Time magazine lists a number of new contraptions that keep pace with our insatiable hunger for self- evaluation.  These include:  the Coros heart rate monitor strapped to our upper arm which allows for more precise assessment of our heart rate compared with the wrist device and the even more beguiling Lumen, a home breathalyzer tracing metabolism as it happens.