Rune Kjøsen Talsnes, PhD, is a postdoctoral fellow at the Norwegian University of Science and Technology. In this interview, we discuss overtraining, training progression and periodisation, and some general topics within endurance training and in particular, insights from the world of cross-country skiing.          IN THIS EPISODE YOU'LL LEARN ABOUT: -Overtraining and non-functional overreaching: definitions and diagnosis -Prevention strategies and monitoring for overtraining and non-functional overreaching -Research on increasing training load via intensity and volume, and implications for short and medium-term performance and physiological markers -Training insights from the world of cross-country skiing -Listener questions ...and more   SHOWNOTES: https://scientifictriathlon.com/tts427/   SCIENTIFIC TRIATHLON AND THAT TRIATHLON SHOW WEBPAGE: www.scientifictriathlon.com/podcast/   SPONSORS: Precision Fuel & Hydration help athletes personalise their hydration and fueling strategies for training and racing. Use the free Fuel & Hydration Planner to get personalised plan for your carbohydrate, sodium and fluid intake in your next event. That Triathlon Show listeners get 15% off their first order of fuel and electrolyte products. Simply use this link and the discount will be auto-applied at the checkout.   ZEN8 - The ZEN8 Indoor Swim Trainer allows you to improve technique, power, and swim training consistency. You can target specific aspects of your stroke, like catch and pull-through, work on core activation and body position, and make sure you stay consistent in your swim training even when you don't have time to go to the pool. Try the Zen8 risk-free for 30 days, and get 20% off your first order on zen8swimtrainer.com/tts.   LINKS AND RESOURCES: Rune's Twitter and Research Gate The return from underperformance to sustainable world-class level: A case study of a male cross-country skier - Talsnes et al. 2023 Effects of Increased Load of Low- Versus High-Intensity Endurance Training on Performance and Physiological Adaptations in Endurance Athletes - Talsnes et al. 2021 How Do the Effects of an 8-Week Intervention Influence Subsequent Performance Development in Cross-Country Skiers? - Talsnes et al. 2022 Training characteristics of world class distance runners with Øyvind Sandbakk, PhD | EP#363 Training talk with Eirik Myhr Nossum, national team coach of Norway’s cross-country skiing team | EP#245   RATE AND REVIEW: If you enjoy the show, please help me out by subscribing, rating and reviewing: www.scientifictriathlon.com/rate/   CONTACT: Want to send feedback, questions or just chat? Email me at mikael@scientifictriathlon.com or connect on Instagram, Facebook, or Twitter.