Cross-country skiing has been thought to be a safe sport, with few serious injuries and a preponderance of upper extremity injuries. Eleven cases of relatively severe injuries illustrate that this is not necessarily true.
(JAMA 239:334-335, 1978)
Lyons JW, Porter RE. Cross-Country SkiingA Benign Sport?. JAMA. 1978;239(4):334–335. doi:10.1001/jama.1978.03280310066022