Polar Vantage M multisport watch includes a running program, a heart rate sensor & more » Gadget Flow
Validity and Reliability of the Polar A300's Fitness Test Feature to Predict VO2max
Polar FT80 User Manual
Amazon.com: POLAR Vantage V2 - Premium Multisport Smartwatch with GPS, Wrist-Based HR Measurement for All Sports - Music Control, Weather, Phone Notifications : Electronics
Running Performance Test
Fitness Test | Polar USA
Polar Pacer Pro with Running Test for VO2max | laboratory, treadmill | A running lab on your wrist. Normally, you would have to go to a laboratory, stick a mask