Purpose The cumulative influence of sleep time on endurance performance remains unclear. This study examined effects of three consecutive nights of both sleep extension and restriction on endurance cycling performance. Methods Endurance cyclists/triathletes (n=9) completed a counterbalanced crossover experiment with three conditions; sleep restriction (SR), normal sleep (NS), and sleep extension (SE). Each condition comprised seven days/nights of data collection (-2, -1, D1, D2, D3, D4, +1)....
Tue Jun 25, 2019 03:00
Introduction The aim of this review is to provide methodological recommendations for menstrual cycle research in exercise science and sports medicine based on a review of recent literature. Research in this area is growing, but often reports conflicting results and it is proposed that some of this may be explained by methodological issues. Methods This review examined the menstrual cycle verification methodologies used in recent literature on exercise performance over the menstrual cycle...
Tue Jun 25, 2019 03:00
Purpose To investigate the association between estimated cardiorespiratory fitness (eCRF) and risk of atrial fibrillation (AF), and examine how long-term changes in eCRF affects the AF risk. Methods This prospective cohort study includes data of 39 844 men and women from the HUNT2 (August 15, 1995 - June 18, 1997) and the HUNT3 study (October 3, 2006 – June 25, 2008). The follow-up period was from HUNT3 until AF diagnosis or November 30, 2015. AF diagnoses were retrieved from hospital registers...
Tue Jun 25, 2019 03:00
Purpose Lactate thresholds are physiological parameters used to train athletes and monitor performance or training. Currently, the assessment of lactate thresholds in kayakers is performed in a laboratory setting utilizing specific ergometers; however, laboratory tests differ from on-water evaluation for several reasons. The aim of this study was to assess reliability and validity of a new on-water incremental test for the assessment of blood lactate response to exercise in flat-water kayakers....
Tue Jun 25, 2019 03:00
Introduction Auto racing poses a unique set of physiologic challenges for athletes who compete in this sport. These challenges are not widely recognized due to the limited amount of original research in this field and the diffuse nature of this literature. The purpose of this article is to review the major physiologic challenges of auto racing and summarize what is currently known about athletes in this sport. Conclusions The physical stressors of either driving or servicing the race car...
Tue Jun 25, 2019 03:00
Purpose This study examined whether the exercise-induced changes in inflammatory cytokines differ between impact and no-impact high intensity interval exercise, and whether they are associated with post-exercise changes in sclerostin. Methods Thirty-eight females (n=19, 22.6±2.7 years) and males (n=19, 22.3±2.4 years) performed two high-intensity interval exercise trials in random order (cross-over design): running on a treadmill and cycling on a cycle ergometer. Trials consisted of eight...
Tue Jun 25, 2019 03:00
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