Garmin Forerunner 305 GPS is a magical little tool that comes in the shape of a watch. It plays the dual role of a heart rate monitor as well as that of a workout planner. This multi-functional unit is quite popular these days because quite a few people are heading to the gym. This generation is interested in preserving their good health as well as their waistlines; people in this group are ready to do a lot of work to achieve their perfect appearance. The Forerunner 305 is one such tool that has made it easier for health enthusiasts to perfect their exercise sessions.