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answer the following questions concerning your health status. If you answer yes to any of these questions, we recommend that you consult a doctor before starting any training program.
•Have you been physically inactive for the past 5 years?
•Do you have high blood pressure or high blood cholesterol?
•Are you taking any blood pressure or heart medication?
•Do you have a history of breathing problems?
•Do you have symptoms of any disease?
•Are you recovering from a serious illness or medical treatment?
•Do you use a pacemaker or other implanted electronic device?
•Do you smoke?
•Are you pregnant?
Note that in addition to training intensity, medications for heart conditions, blood pressure, psychological conditions, asthma, breathing, etc., as well as some energy drinks, alcohol, and nicotine may also affect heart rate.
It is important to be sensitive to your body’s responses during training. If you feel unexpected pain or excessive fatigue when training, it is recommended that you stop the training or continue at a lighter intensity.
Note! If you are using a pacemaker, you can use Polar training computers. In theory interference to pacemaker caused by Polar products should not be possible. In practice no reports exist to suggest anyone ever having experienced interference. We cannot however issue an official guarantee on our products' suitability with all pacemakers or other implanted devices due to the variety of devices available. If you have any doubts, or if you experience any unusual sensations while using Polar products, please consult your physician or contact the implanted electronic device manufacturer to determine safety in your case.
If you are allergic to any substance that comes into contact with your skin or if you suspect an allergic
reaction due to using the product, check the listed materials in Technical Specifications (page 48). To avoid any skin reaction to the heart rate sensor, wear it over a shirt, but moisten the shirt well under the electrodes to ensure flawless operation.
Your safety is important to us. The shape of the s3+ stride sensor* is designed to minimize the possibility of it getting caught in something. In any case, be careful when running with the stride sensor in brushwood, for example.
The combined impact of moisture and intense abrasion may cause a black color to come off the heart rate sensor’s surface, possibly staining
Using RCX3 Training Computer in water: The training computer is water resistant. However, heart rate measurement does not work in water. You can use the training computer under water as a watch but it is not a diving instrument. To maintain water resistance, do not press the buttons of the training computer under water. Using the training computer in excessive rainfall may also cause interference.
Technical Specifications
Training computer
Battery life:
Battery type:
Average 8 months if you only use the heart rate sensor, and train an average of 1h/day 7 days/week.
Average 7,5 months if you use the heart rate sensor and one other sensor, and train an average of 1h/day 7 days/week.
Average 7 months if you use the heart rate sensor and two other sensors, and train an average of 1h/day 7 days/week.
Battery life has been calculated with the presumption that the power save mode is on.
CR 2025
48Important Information