The SRM Training System is intended to take your training and racing to the next level by incorporating power based training into your routine. Training with a PowerMeter allows you to specifically target the actual demands of your goals, pace your effort on race day, organize your workout schedule and track fitness trends with consistent, accurate data. First Patented in 1987, the SRM PowerMeter gave the cycling world one of its greatest innovations for performance based training tools. Training by the metric of power allows cyclists to have truly objective data based on their performance, rather than rely only on heart rate, speed and perceived exertion. Power output is not directly influenced by environmental factors.