The Forerunner 405CX is coming as an improvement on the existing Forerunner 405. Using algorithms developed by scientists and athletes, Forerunner 405CX monitors the micro changes in a user’s heart rate and uses that detailed information to better calculate the number of calories burned during aerobic activity. To develop this calory computation, Garmin worked with Firstbeat Technologies Ltd., a technology company based in Finland. Firstbeat specializes in developing user-centered software solutions for heart beat signal analysis in exercise and sports, weight management, and stress monitoring applications.
The Forerunner 405CX weight 60 grams, is water-resistant (IPX7) and can be used outdoors or indoors with an optional, streamlined foot pod that can fit on laces or under certain shoes’ insoles.
the Forerunner 310Xt is a fully waterproof multi-sport solution, position as the evolution of the existing Forerunner 305. It boasts up to 20 hours of battery life but does not have the sleek design of the forerunner 405CX and is slightly heavier (72g).
It will be sold on its own or packaged with a new waterproof, soft-strap heart rate monitor, which will be more comfortable than previous models and is expected to be available during summer 2009.
The Forerunner is well adapted to triathlon. First, it is waterproof to a depth of 50 meters, so it can be wore to time a swim. Second, it is said to: “move easily from wrist to bike with the optional quick release and bike mounts, making the transition between sports effortless”.