Polar Electro S720i User Manual download pdf (Page 106)

M. POLAR GLOSSARY

M 104

Activity level: Your long-term

physical activity level you need to

assess in order to do the Polar Fitness

Test.

Altitude and temperature: The

altitude and temperature are

measured by using an atmospheric

pressure sensor. Air pressure changes

constantly due to various weather

conditions and therefore the

calculated altitude of a certain spot

may differ. Variation of high and low

pressure or air conditioning can cause

a change in the altitude reading.

For example, a thunderstorm can

cause a change of up to 80 mbars,

which means a change of

approximately 700 m/ 2000 ft in the

calculated altitude. Therefore, it is

recommended that you adjust the

exact starting point altitude whenever

a reliable reference; for example, a

peak pointer or a map, is available. It

is also recommended that you check

the altitude of your house and other

common starting points for training.

Coded heart rate transmission:

Polar coded transmitter automatically

locks in a code to transmit your

heart rate to the wrist receiver. In a

coded transmission the receiver

accepts heart rate data only from

the Polar coded transmitter. Coding

significantly reduces crosstalk

caused by other users of heart rate

monitors. However, it does not

necessarily reduce all environmental

interference.

Electrodes: The grooved areas of

the transmitter, against the skin.

Pick up the heart rate.

Maximal oxygen uptake:

(maximal aerobic power, VO

2max

) Is

the maximal rate at which oxygen

can be used by the body during

maximal work. VO

2max

is a good

index of aerobic fitness.

Maximum heart rate: (HR

max

) Is

the highest number of heart beats

per minute of a person.

Target heart rate zone: The area

between the upper and lower

target heart rate limits. Target zone

selection is based on personal

fitness goals.

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