If not, arrange yourselves so that you are both wearing your receivers on your outside arms. The solution may be to find a partner who isn't as scientific as you are (and therefore does not wear a monitor). (This should take 8 to 10 minutes.) The signal is also transmitted better and stronger once you start to sweat.Ĭross feed occurs when your monitor receives information from the transmitter of the person next to you. If you suspect that static cling is causing the problem, wet your hand and wipe it across the material in front of the transmitter, or just wait until you've run far enough for sweat to drain off the static. Females may find that underwire bras can be a source of interference. Usually, sweat takes care of it pretty quickly. Nylon wind jackets can generate static electricity that also can interfere with the transmission from the chest strap to the receiver, although this is more likely to be a concern in dry or cold climates. Shirts still charged with static electricity from the dryer can confuse the receiver. One cause of irregular readings is clothing worn over the transmitter. When this happens, we recommend buying a new strap. Straps stretch over time and become loose. If this is a consistent problem, buy a shorter strap or permanently shorten your strap by putting a few stitches into it to hold it in the shortened position. Put a safety pin in front of the slide to keep the strap from slipping back to the original halfway position. If you have a very small rib cage and narrow chest, just tighten the strap well past the halfway point to achieve the 6-inch (15 cm) gap even if it means that the extra material loops down. This interferes with the transmitting of the electrical impulses of the heart muscle. One cause of irregular readings is a loose chest strap that allows the electrodes to slip and slide on the skin and cause electricity from the friction. Therefore, any time an irregularity occurs in the signal, it will be reflected in the heart rate number displayed. However, it does use the electrical activity of the heart to give you a signal. The heart rate monitor is not an electrocardiogram (ECG). Normally, you will notice a steady increase or decrease in your heart rate that will pretty much match your effort. Several conditions may cause your heart rate numbers to skip all over the place. This is an excerpt from Heart Rate Training by Roy Benson & Declan Connolly.
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