At a coaching conference a while back, I listened to some very experienced triathlon coaches speak about Ironman training. According to these coaches, the TSS (Training Stress Score) numbers that TrainingPeaks can calculate are solid enough for them to say with some conviction that to complete the world championship race in Kona in under 9 hours, a triathlete needs a CTL (Chronic Training Load) of … Continue reading Understanding and Using the TrainingPeaks Metrics CTL and TSS