I've just done the speed podcast for the first time and was talking to a friend about it and I am very confused.
Laura explained about bpm and running faster. Okay. But how does bpm work? Here's me, at 5'2" with short legs, running at 165bpm. Fine. But surely, if there's someone who's 6'2", with lovely long legs, also running at 165bmp, won't our stride be a different length and therefore won't we run at different speeds? How does the Garmin know? My friend has one, and she uses a footpod with it and said that her stats are 80 - 90 bmp - but is this only recorded every other footfall? She says she runs very slowly, so is this 80 - 90? I can't believe that I was running twice as fast as her, because I know I'm fairly slow too.
Can't you take smaller steps and therefore not be running any faster, moving from 155bpm to 165 bpm? Do you expend more effort this way anyway? How do you actually track your speed on a real run - especially if you don't own a Garmin (other equivalent products are available)?
Ack - my brain hurts! Can anyone help?