Polar F4 manual G L I S H

E N G L I S H

•Improves aerobic fitness

•Improves endurance

•Helps in weight control

•Accustoms your body to exercising at a faster pace

•Helps to increase the speed you can maintain without building up lactic acid

At 80-90% of your HRmax, you have moved into the Hard Intensity Zone. Exercise in the hard intensity zone definitely feels “hard”. You will find yourself breathing heavily, having tired muscles and feeling fatigued. This intensity is recommended occasionally for fit people. Exercising in this zone is intensive, so it provides some unique benefits.

•Increases muscles’ tolerance to lactic acid (your anaerobic threshold)

•Improves hard, short effort ability

When you exercise in the right intensity zones, it guarantees your enjoyment in your favourite sports. Alternate between intensity zones to improve your fitness and get variation in your

exercise. Remember that the lower the intensity the longer you can comfortably exercise in it. Exercise in higher intensity for shorter periods.

Polar target heart rate intensity definition is modified from international exercise science authorities’ recommendations in which light intensity can reach lower than 60% of HRmax

14Settings