I am almost 50 years old and I am not that healthy anymore if we will be talking about my heart and my general overall conditioning. In fact I even have hypertension so I have to really strictly monitor my blood pressure and heart rates all the time. Good thing I have an efficient heart rate monitor with me all the time, which is my Timex T5G971 which helps tell me if an activity I am doing is too much strenuous for me and can trigger my hypertension. I chose this watch over others, thanks to the information I got from heart rate monitor reviews online in this site called heartratemonitorreviewshq.com. The articles I found here told me that this is one of my best choice brands which I can certainly rely on for the long run. I think I chose well as I am easily able to adapt to using this watch more often now.