[jack111]

thanks for the reply.
Have visited firstbeat technologies and have read the dessertation as well.

suunto watches measure just one variable i.e the R-R interval which all heart rate monitors do. nothing to the contrary said in your post.

They use this i.e R-R interval or in other words heart rate to calcualte various things like epoc and training effect.

EPOC accumulation is based on intensity and duration as mentioned in the post but also includes a variable for Heart Rate Variation (time between heart beats) which can impact the accumulated EPOC

To say the above is misleading ...Intensity is measured by how fast your heart beats and nothing else . Since the only thing which suunto measure is the R-R interval.
Heart rate variation in other words is fast heart rate or slow heart rate.

	Suunto Visit SuuntoWatches.com to see Suunto's full line of wrist top computers and compasses.

	Suunto Training Effect watches - Click for more info More than a heart rate monitor, Suunto's exclusive Training Effect feature tells you whether you're training too little, too hard or staying within the zones for optimal improvement.