Gindulis, M., Netzer, N., Burtscher, M., Gatterer, H., Schmidt, C., Morrison, A. and Küpper, T. 2021. Extreme sleep fragmentation for 11 consecutive days and nights does not significantly alter total sleep time, and sleep stage distribution, during the continuous alpine downhill skiing world record. Health Promotion & Physical Activity. 17, 4 (Dec. 2021), 18–24. DOI:https://doi.org/10.5604/01.3001.0015.6743.