18 Fitness Watches

Runners and cyclists have long used digital watches to train and track their racing times, but now things have stepped up a notch in the world of fitness watches. Fitness watches are a popular new development in the health industry due to their compact, mobile nature and their ability to compute and communicate exercise data in seconds.

Here we see stress-sensing watches that track your body temperature and heart rate and let you know when your stress levels are getting out of control. This is a helpful tool for those of us who get too hot around the collar from time to time. It's perfectly acceptable to relax, as the stress-sensing watch doesn't like it when you're all hot and bothered.

Another interesting fitness watch is a puzzle watch designed to train your mind to make it more agile and adaptive.