Learn All About Power Meters
Watts are objective, not dependent on the varying factors of your body or the weather. If you held 305 watts for 30 minutes on April 8, and then you churned out 318 watts for a 30-minute period a month later, you know you are improving.
Finally, you'll be able to track your fitness and improvement over a wide array of new levels. If you've enjoyed measuring your average speed on your favorite courses, you'll love being able to measure effort, calories, time in various zones, the intensity factor of the ride and much more.
TSS takes IF into account to provide an even better big-picture measurement of training stress. By taking IF and duration into account, TSS can be used to quantify your overall training load. By then gradually increasing TSS for several weeks and dropping it during rest weeks, you can pinpoint overload training like never before. Or, if serious training isn't your goal, you'll be able to gauge fatigue like never before. If you have trouble sleeping or find yourself snapping at your relatives, a quick check of TSS will show you if overtraining is to blame.