Elliptical and magnetic brakes?

I'm looking to purchase an elliptical and a lot, if not all, of the ones I've researched seem to have "magnetic" parts. In the specs of one of them, it mentions a Magnetic Eddy Current Brake (ECB) system, and another one advertises that it features Silent Magnetic Resistance (SMR). Obviously, with a pacemaker, the word "magnetic" is alarming to me. Would these be safe to use with a pacemaker, or should I perhaps look into purchasing a treadmill or alternate piece of equipment? Thanks!

2 Comments

test drive it first

by Tracey_E - 2009-12-05 09:12:06

Small magnets are not usually a problem as long as we keep them more than 6 inches from our device. You would know pretty quickly if it's going to be an issue. If we get near a magnet that's too strong, it may put you in test mode with limited function (like when we have it checked) but as soon as you step away from the magnet, it will return to normal function. It's not dangerous, just annoying and it doesn't feel too good.

I use the elliptical at the gym all the time and do not have a problem. I can't tell you what kinds they are, but my gym has 4 different ones and I've used them all. I know for sure the word magnet is not on any of them.

Magnetic Eddy Current Brake

by ElectricFrank - 2009-12-06 12:12:40

The magnet in these systems is located down near the floor where all the mechanical rotating parts are located. While it is a strong magnet, it is a long ways away from your pacemaker. The field is concentrated in a rotating metal disk so only a small part escapes.

Here's a trick that works with some limitations. Tie a 12" piece of thread to a small metal paper clip. Let the paper clip swing free and move it around the equipment. Watch for it to be attracted and if it is notice where on the equipment the attraction comes from. That would be the location of the magnetic field. It's interesting to try this with an older large loud speaker that allowed a lot of its magnetic field to escape.

Now the limitation. This only works with a continuous magnetic field. An alternating current magnetic won't affect the clip. The Magnetic Eddy Current Brake uses a continuous field so the test should be accurate.

frank

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