's Forum Archives - General

Archive Home >> General(1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 )

Quick HRM watch question...(3 posts)

Quick HRM watch question...mtbiac
Sep 27, 2002 5:32 PM
Do they sell heart rate monitoring watches that use your wrist to get heart rate INSTEAD of that annoying chest strap? I find even the wireless models of chest straps very annoying...

ANy help would be much appreciated :)

re: I'm just guessing but...Akirasho
Sep 27, 2002 11:41 PM
... the chest strap reads actual cardiac electrical activity and is relatively low tech... a wrist sensor would probably require some type of doppler ultrasound and be more expensive and techie (might also be more prone to spurious readings during heavy exercise (reading even the sounds of muscle contractions over actual venous flow))...

My guess is, the current tech is so effective (and accurate) and cheap (relatively speaking) that there's not much of a push for anything else (perhaps a different brand would have a more comfortable strap)... nows your chance to capitalize on a market niche... or loose your shirt!

We abide.

Remain In Light.

Be the bike.
re: I'm just guessing but...Lactate Junkie
Sep 28, 2002 9:27 AM
You hit it right on the head. There is so much noise out at the wrist that it is almost impossible to pick up any kind of a signal. It can be done kind of using fetal heart tech., but it is only good at rest. As soon as you move all the other noise in the body swamps it out. You are also correct about cost. Generally, the person who is really bugged by the cheststrap is an entry level consumer(serious athletes live with the strap and in short order you do not even notice it is there--kind of like wearing a helmet), who would not be willing to pay the high costs for the advanced technology which would be necessary to develop a wrist mounted product. As you can buy a very good hrm for under $100 these days it would be a tough sell to tell people that they would have to pay a grand for one that runs off their wrist--if it can even be done.