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A Basic Guide to Heart Rate Monitors by Les Knight and Jack Groppel
Polar Outdoor Sports by Ray Browning
Pedometer Walking by Robert Sweetgall
Precision Walking by Mark Fenton and Dave McGovern
Precision Heart Rate Training by Edmund R. Burke, PhD and Dave Scott
Precision Mountain Biking by Edmund R. Burke, PhD
Precision Cycling by Edmund R. Burke
Walk Yourself Thin by David A. Rivers
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