Share Facebook Twitter LinkedIn Email Telegram WhatsApp A metric quantifying the training load and intensity of workouts or training plans to track and manage training stress. Defined by TrainingPeaks, one hour of all-out effort equates to a TSS of 100. Synonyms: TSSRelated Articles: Understanding and Using the TrainingPeaks Metrics CTL and TSS Powering Through at the Power of Four Ski Mountaineering RaceDIY Anaerobic Threshold TestTapering for a Race or Event: What to Do and What Not to DoFit to Climb: Everest