• Qin, Y. et al. (2025). Acute to chronic workload ratio for predicting sports injury risk: A systematic review and meta-analysis. BMC Sports Science, Medicine and Rehabilitation.
• Impellizzeri, F. M., Tenan, M. S., Kempton, T., Novak, A., & Coutts, A. J. (2020). Acute:Chronic Workload Ratio: Conceptual Issues and Fundamental Pitfalls. International Journal of Sports Physiology and Performance, 15(6), 907–913.
• Drew, M. K., & Finch, C. F. (2016). The relationship between training load and injury, illness and soreness. Sports Medicine, 46(6), 861–883.
• Windt, J., & Gabbett, T. J. (2017). How do training and competition workloads relate to injury? British Journal of Sports Medicine, 51(5), 428–435.

VDOT-Stufen nach Jack Daniels (VO₂max):
Referenz zur Methodik und den Leistungsstufen: https://marathonhandbook.com/whats-a-good-half-marathon-time/

Age-Grading-Standards (Alan Jones):
World Masters Athletics (WMA) – Age Factors 2023: https://world-masters-athletics.org/wp-content/uploads/2023/02/2023-Age-Factors-WMA.pdf

USATF Masters Long Distance Running Council (MLDR) – Age-Grading Standards bis 200 km: https://www.usatf.org/

Howard Grubb – Offizielle Age-Grading-Rechner (Road & Ultra):
Road: https://www.howardgrubb.co.uk/athletics/wmatf25.html
Ultra (MLDR): https://www.howardgrubb.co.uk/athletics/mldrroad25.html

• Stephen Seiler – Endurance Training Intensity Distribution
• M. J. Karvonen – Herzfrequenzreserve-Modell
• Andreas Butz / Laufcampus – Laufcampus-Trainingsmodell
• Jack Daniels – Daniels’ Running Formula
• Jones & Vanhatalo – Critical Speed and Exercise Physiology

• Jack Daniels – Daniels’ Running Formula
• Andrew Coggan & Hunter Allen – Training and Racing with a Power Meter
• Stephen Seiler – Endurance Training Intensity Distribution
• Jones & Vanhatalo – Critical Speed and Exercise Physiology
• Midgley et al. – Determination of Maximal Oxygen Uptake

• American College of Sports Medicine (ACSM). ACSM's Guidelines for Exercise Testing and Prescription, 11th Edition. Wolters Kluwer, 2021.
• Casa, D. J., et al. "National Athletic Trainers' Association Position Statement: Exertional Heat Illnesses." Journal of Athletic Training, 50(9), 986–1000, 2015.
• Sawka, M. N., Leon, L. R., Montain, S. J., & Sonna, L. A. "Integrated Physiological Mechanisms of Exercise Performance, Adaptation, and Maladaptation to Heat Stress." Comprehensive Physiology, 1(4), 1883–1928, 2011.
• World Athletics. Athletes' Guide to Heat and Humidity. https://worldathletics.org/
• Deutscher Olympischer Sportbund (DOSB). Sport im Sommer – Sicher trainieren bei Hitze. https://www.dosb.de/
• Deutsche Gesellschaft für Sportmedizin und Prävention (DGSP). Empfehlungen zum Sporttreiben bei hohen Temperaturen. https://www.dgsp.de/

• Sawka, M. N. et al. (2007): American College of Sports Medicine Position Stand: Exercise and Fluid Replacement. Medicine & Science in Sports & Exercise. :contentReference[oaicite:0]{index=0}
• National Athletic Trainers’ Association (2017): Fluid Replacement for the Physically Active. Journal of Athletic Training. :contentReference[oaicite:1]{index=1}
• Casa, D. J. et al. (2000/2017 Update): Empfehlungen zur Flüssigkeitsaufnahme und Risiken von Hypohydration und Hyperhydration. :contentReference[oaicite:2]{index=2}
• Maughan, R. J. et al. (2018): IOC Consensus Statement: Dietary Supplements and the High-Performance Athlete. British Journal of Sports Medicine. :contentReference[oaicite:3]{index=3}
• ACSM PDF-Version: Exercise and Fluid Replacement. :contentReference[oaicite:4]{index=4}

• American College of Sports Medicine (ACSM). Exercise and Fluid Replacement. Medicine & Science in Sports & Exercise, 39(2), 377–390, 2007.
• Hew-Butler, T., Rosner, M.H., Fowkes-Godek, S. et al. Statement of the Third International Exercise-Associated Hyponatremia Consensus Development Conference. Clinical Journal of Sport Medicine, 25(4), 303–320, 2015.
• Noakes, T.D. Waterlogged: The Serious Problem of Overhydration in Endurance Sports. Human Kinetics, 2012.
• Hoffman, M.D. & Stuempfle, K.J. Exercise-Associated Hyponatremia in Endurance and Ultra-Endurance Performance. Sports Medicine.
• Wilderness Medical Society. Clinical Practice Guidelines for Exercise-Associated Hyponatremia. Wilderness & Environmental Medicine.
• International Society of Sports Nutrition (ISSN). Position Stand: Exercise Hydration.
• Casa, D.J. et al. National Athletic Trainers' Association Position Statement: Fluid Replacement for the Physically Active. Journal of Athletic Training.
• Maughan, R.J. & Shirreffs, S.M. Development of Individual Hydration Strategies for Athletes. International Journal of Sport Nutrition and Exercise Metabolism.
• Sawka, M.N. et al. American College of Sports Medicine Position Stand: Exercise and Fluid Replacement. Medicine & Science in Sports & Exercise.
• European Food Safety Authority (EFSA). Dietary Reference Values for Water. EFSA Journal.

• Hoffman, M.D. & Stuempfle, K.J. Exercise-Associated Hyponatremia in Marathon and Ultramarathon Runners. Sports Medicine.
• Costa, R.J.S. et al. International Consensus on Nutrition for Endurance Exercise. British Journal of Sports Medicine.
• American College of Sports Medicine. Nutrition and Athletic Performance. Medicine & Science in Sports & Exercise.
• International Olympic Committee (IOC). Dietary Supplements and the High-Performance Athlete. British Journal of Sports Medicine.
• Bergeron, M.F. Heat Stress and Fluid-Electrolyte Balance in Endurance Exercise. Clinics in Sports Medicine.
• Cheuvront, S.N. & Kenefick, R.W. Dehydration: Physiology, Assessment and Performance Effects. Comprehensive Physiology.
• Maughan, R.J., Shirreffs, S.M. & Watson, P. Exercise, Heat, Hydration and the Brain. Journal of the American College of Nutrition.
• European Food Safety Authority (EFSA). Dietary Reference Values for Sodium and Chloride. EFSA Journal.