Longitudinal follow-up of biochemical markers of fatigue throughout a sporting season in young elite rugby players.

International audienceOBJECTIVES:: The aims of the present study were to evaluate links between biochemical markers and competition and training conditions, overtraining questionnaire scores, and anthropometric characteristics of young elite rugby players, and to identify evolving profiles of fatigue during the sports season. METHODS:: Twelve elite rugby players were included in the study. The tests were carried out every 15 days over the course of one sporting season from July until March, including the inter-season. Changes in body composition parameters, blood biochemistry, and scores on various questionnaires were examined. RESULTS:: The majority of the biochemical parameters and subjective variables showed significant variations over time. There were significant positive correlations between overtraining scores and alanine amino transferase (r = 0.24, p < 0.05) and creatine phosphokinase (r = 0.3 p < 0.01) levels. In addition, game time was significantly correlated with changes in creatine phosphokinase (r = 0.46, p < 0.01), while difficult training sessions were significantly correlated with changes in both creatine phosphokinase (r = 0.27, p < 0.05) and alanine amino transferase (r = 0.33 p < 0.01). CONCLUSION:: We suggest that regular monitoring of these biochemical parameters may provide important information for the coach on the fatigue of rugby players and their perceived difficulty of training

Impact of an additional task on gait parameters in older adults with dementia

International audienceIntroduction: This study contributes to assess the impact of an additional task on the gait parameters in elderly people with dementia. Summary of facts: Each patient completed a locomotor test in situation of single and dual-task. The gait quality was assessed using the Locometrix to collect the following parameters: speed, stride length, cadence, regularity, power. Conclusion: The gait quality of patients is significantly impaired in dual-task situation. Consideration must be conducted to provide a specific program activity for these patients to maintain their autonomy

Firefighters night call emergency: Myocardial autonomic regulation consequences [L'appel d'urgence nocturne chez les pompiers : Conséquences sur la régulation autonome du myocarde]

International audienceIntroduction: The objective of our work is to study the impact of night emergency calls on autonomic myocardial regulation of the heart of firefighters. Summary of facts: Eleven good health firefighters participated in the study. The registration of the VFC on call overnight allowed us to quantify the impact of a night-time emergency call on autonomic myocardial regulation activity. Conclusion: We have shown that the brutal transition from sleep to awakening state is a risk for firefighter's health. © 2011 Elsevier Masson SAS