Time-of-day variation on performance measures in repeated-sprint tests: a systematic review.

Time-of-day variation on performance measures in repeated-sprint tests: a systematic review. Chronobiol Int. 2019 Dec 19;:1-18 Authors: Pullinger SA, Cocking S, Robertson CM, Tod D, Doran DA, Burniston JG, Varamenti E, Edwards BJ Abstract The lack of standardization of methods and procedures have hindered agreement in the literature related to time-of-day effects on repeated sprint performance and needs clarification. Therefore, the aim of the present study was to investigate and systematically review the evidence relating to time-of-day based on performance measures in repeated-sprints.The entire content of PubMed (MEDLINE), Scopus, SPORTDiscusĀ® (via EBSCOhost) and Web of Science was searched. Only experimental research studies conducted in male adult participants aged ā‰„18yrs, published in English before June 2019 were included. Studies assessing repeated-sprints between a minimum of two time-points during the day (morning versus evening) were deemed eligible.The primary search revealed that a total of 10 out of 112 articles were considered eligible and subsequently included. Seven articles were deemed strong and three moderate quality. Eight studies found repeated-sprint performance across the first, first few, or all sprints, to increase in favor of the evening. The magnitude of difference is dependent on the modality and the exercise protocol used. The non-motorized treadmill established an average 3.5-8.5% difference in dista...
Source: Chronobiology International - Category: Biology Authors: Tags: Chronobiol Int Source Type: research