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Review: Polar RS800sd

Rather than just count how many times a minute your heart thumps, this doc-in-a-watch tracks heart-rate variability — a more accurate measure of fitness (the quicker your heart rate adjusts to activity, the better shape you’re in). In addition to speed and distance, an optional matchbook-size footpod ($140) gauges cadence and stride length — two […]
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Rating:

8/10

WIRED
Best choice for competitive runners. Amazingly customizable software and display. Graphs heart rate with almost EKG-level detail. Desktop software provides more feedback than a year in therapy.
TIRED
Who said the Finns were good at design? Watch has the aesthetic appeal of Soviet-era architecture. PC-only software's learning curve is steeper than the Boston Marathon's Heartbreak Hill. Bulky GPS pod.

Rather than just count how many times a minute your heart thumps, this doc-in-a-watch tracks heart-rate variability — a more accurate measure of fitness (the quicker your heart rate adjusts to activity, the better shape you're in). In addition to speed and distance, an optional matchbook-size footpod ($140) gauges cadence and stride length — two hugely important but hard-to-track variables.