Walmart has massively marked down a highly-rated pulse oximeter that's designed to monitor your heart rate and blood oxygen levels whether you're at home or playing sports. If you want a better ...

It seems like within the last ten years, every other gadget to be released has some sort of heart rate monitoring capability ... is generated by video of your finger covering the phone camera.

An updated Fitbit patent filing adds detail to the company's concept of a blood pressure wearable that uses someone's finger rather than an arm cuff technique.

But distance, time and pace are all blunt tools for measuring effort, which is where heart rate monitors come in. Tracking your beats per minute (BPM) unlocks extra insights, from real time effort ...