PubMed | 1 GSK Human Performance Laboratory and 2 IPRO Interactive Ltd
Type: | Journal: International journal of sports physiology and performance | Year: 2016
The purpose of this case study was to assess changes in body composition and to monitor cognitive function, subjective wellbeing and physiological stress, as measured by salivary hormones and markers of mucosal immunity, during an Antarctic expedition.A 36 year old male (188.2 cm height; 94.5 kg body mass) took part in a world record attempt. A total body DEXA scan and measurement of 8 skinfolds and 5 girths were performed before and after the expedition. Additionally, daily subjective data was recorded (sleep quality, total hours of sleep, energy levels, perceived exertion, mood, muscle soreness and muscle/joint pain) along with distance covered and hours of physical activity per day. As a measure of cognitive function the athlete completed a computerised battery of tasks (Axon Sports Cognitive Priming Application) every third morning. Saliva samples were collected before, during and after the expedition to determine salivary cortisol (sCort), testosterone (sT), alpha amylase (sAA) and secretory immunoglobulin A (sIgA).The athlete lost 5.3 kg body mass and sum of 8 skinfolds decreased from 73 mm to 59 mm from pre to post-expedition. Psychomotor speed declined over the course of the expedition. sT increased and sCort decreased throughout and sAA and sIgA peaked towards the end of the expedition.This case study provides novel data about the physiological and cognitive impact of Antarctic expedition. The findings may inform strategies for future expeditions allowing individuals undertaking expeditions of this nature to better prepare for success.