Polar - Introducing Polar OH1 optical heart rate sensor. Optimized for use on the lower or upper arm, Polar OH1 provides an alternative method for measuring your heart rate during training. In
Polar V800 GPS Sports Watch with Heart Rate Monitor - Black : Amazon.co.uk: Sports & Outdoors
Polar - "As kids, whenever we visited the village, my grandmother would wake us up at 5am for a run to the stream. I hated it and I would do everything in