The importance of individual characteristics on bicycle performance during alcohol intoxication

Abstract

Bicycling accidents are a well-known problem for traffic safety globally. Alcohol intoxication is one possible factor, although the exact number of accidents due to intoxication is difficult to establish. Not all bicyclists act in the same way, particularly when under the influence of alcohol, i.e. bicycling performance might be related to a bicyclist's personal characteristics. This study aimed to investigate if the bicyclist's characteristics (bicycling experience, physical fitness, or sensation seeking scores) influence bicycling stability, cognitive performance, or self-rated bicycling ability ratings at different levels of alcohol intoxication. The experiment was completed on a wide treadmill, which allowed control of several influencing factors such as speed and physical effort. Intoxicated and sober participants bicycled on the treadmill five times for 10 minutes each time, and breath alcohol concentration (BrAC) levels were measured five times. Participants were given doses of alcohol up to a BrAC level of 0.8‰. The results revealed that alcohol intoxication had a significant effect on stability, cognitive executive functions, and self-rated ability to bicycle on the treadmill. Group characteristics had an effect on bicycling performance and on self-ratings of bicycling ability when intoxicated. Alcohol intoxication affects stability, cognitive performance, and perceived ability to bicycle. Group characteristics are important for examining possible self-regulated behavior, as some groups rate that they can bicycle safely, even when there is an objective decrease in stability and executive functions.