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i use one. its great! theyre like a tachometer for your heat. you know when youre going full throttle or not. my cardio was upped dramatic when i knew if i was working hard or not.
i bought a cheap Polar HR monitor on ebay for $30. all it does is show me my HR and total time i was working out. when you turn it off, it shows the my average HR for the workout. i really like it.
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Sometimes I wish I was dead. Wait, not me. You. - Jack Handy
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