Small businesses often estimate their inventory. If you operate your business on the basis of inaccurate inventory figures, however, you may experience stock outs -- running out of products when ...

Tiny fluctuations in the time between each beat of your heart can provide clues about how much stress your body is experiencing. Associate professor Anne R. Crecelius discusses heart rate variability ...

When it comes to the quality of your sleep, the number of steps you take in a day, and how hard your heart is pumping during your sprints sesh, you know all the stats. Your fitness tracker has been ...

Your heart beats around 100,000 times every day. Heart rate is a key marker of cardiovascular activity and an important vital sign. But your pulse is not as steady as a precision clock – nor would you ...