A very good idea 2

I had long sought to measure a product from time to time my heart fréqeunce during my walking hikes. Especially after a good climb.
I tried 1 or 2 times a system with belt: cà works really well but it is not suitable for my use (a belt for 5-6 hours, I was irritated each time).
And I have seen with my physio this cardiobague who uses on his patients to check their heart rate after a little physical exercise SKILLS.

So I bought this product I not conaissais and I am delighted. In flat or downhill parts, I leave in the pocket (really very light and lil) and when cà up and I feel that I am worth, I put it and look where I am in my fc. Once or 2 I realized that I had a little too forced (170 at my age is best avoided).
Since I no longer separates me in my rides.

Just one defect: the battery is not easy to change -faut a screwdriver small enough and I have not

For the race on foot, I can not tell you, I run but not for randon, it's really good