The training computer of choice!

Bought it three months ago on this site, this little jewel of technology has allowed me to gradually optimize my sales of indoor cardio and strength training, what I liked: aesthetic, compact, relatively intuitive.
Calculates your energy consumption, the proportion of fat (!) And your resting heart rate (useful to see your progress and your state of stress) and your VO2 max, ie the amount of oxygen your body can consume relative to its mass (rather information for athletes and you can see your progress).
This is a relatively expensive product and for that reason I advise you only if you already have a good rhythm training: 3 hours per week at minimum.

There are basically two modes of recording your exercise: normal (for cardio workouts like rowing machine, elliptical and Co., it does not appear to curve as in the photo) and bodybuilding mode (as in photo) : the curve represents the change in your heart rate over time: perfect for the split, the watch tells you when you can start a series from the heartbeat.
The polar site is quite well done although I am not using any one finds all summary time, distance, amount of energy supplied (the famous kcal) ... and more if you bought accessories specific as accelerometer and / or GPS!

The watch (yes it's also shows!) Invites you every month to make a balance VO2max + resting heart rate and adjusts your workout accordingly, you score every week depending on the goals you have achieved or not.
Are provided in the housing: the heart rate monitor (good ah ??) the USB transmitter to send your workouts to the site [...] and the belt and transmitter that you wear around the bust ... against all your heart !