Impact of a carbohydrate mouth rinse on corticomotor excitability after mental fatigue in healthy college-aged subjects

Mental Fatigue (MF) has been associated with reduced physical performance but the mechanisms underlying this result are unclear. A reduction in excitability of the corticomotor system is a way mental fatigue could negatively impact physical performance. Carbohydrate (CHO) mouth rinse (MR) has been shown to increase corticomotor excitability. The purpose of this study was to determine if CHO MR impacts corticomotor excitability after MF. Fifteen subjects (nine females, six males; age = 23 ± 1 years; height = 171 ± 2 cm; body mass = 69 ± 3 kg; BMI = 23.8 ± 0.7) completed two sessions under different MR conditions (Placebo (PLAC), 6.4% glucose (CHO)) separated by at least 48 h and applied in a double-blinded randomized fashion. Motor-evoked potential (MEP) of the left first dorsal interosseous (FDI) was determined by transcranial magnetic stimulation (TMS) before and after MF. Perceived MF was recorded before and after the MF task using a 100 mm visual analog scale (VAS). MF was greater following PLAC (+30.4 ± 4.0 mm) than CHO (+19.4 ± 3.9 mm) ( = 0.005). MEP was reduced more following PLAC (-16.6 ± 4.4%) than CHO (-3.7 ± 4.7%) ( < 0.001). CHO MR was successful at attenuating the reduction in corticomotor excitability after MF. Carbohydrate mouth rinse may be a valuable tool at combating the negative consequences of mental fatigue

Impact of a Carbohydrate Mouth Rinse on Corticomotor Excitability after Mental Fatigue in Healthy College-Aged Subjects

Mental Fatigue (MF) has been associated with reduced physical performance but the mechanisms underlying this result are unclear. A reduction in excitability of the corticomotor system is a way mental fatigue could negatively impact physical performance. Carbohydrate (CHO) mouth rinse (MR) has been shown to increase corticomotor excitability. PURPOSE: The purpose of this study was to determine if CHO MR impacts corticomotor excitability after MF. METHODS: Fifteen subjects (nine females, six males; age = 23 ± 1 years; height = 171 ± 2 cm; body mass = 69 ± 3 kg; BMI = 23.8 ± 0.7) completed two sessions under different MR conditions (Placebo (PLAC), 6.4% glucose (CHO)) separated by at least 48 h and applied in a double-blinded randomized fashion. Motor-evoked potential (MEP) of the left first dorsal interosseous (FDI) was determined by transcranial magnetic stimulation (TMS) before and after MF. Perceived MF was recorded before and after the MF task using a 100 mm visual analog scale (VAS). RESULTS: MF was greater following PLAC (+30.4 ± 4.0 mm) than CHO (+19.4 ± 3.9 mm) (p = 0.005). MEP was reduced more following PLAC (−16.6 ± 4.4%) than CHO (−3.7 ± 4.7%) (p &lt; 0.001). CONCLUSIONS: CHO MR was successful at attenuating the reduction in corticomotor excitability after MF. Carbohydrate mouth rinse may be a valuable tool at combating the negative consequences of mental fatigue

Organizational justice in sport

Research on organizational justice in sport has evolved during the past fifteen years. Much of that research has focused on the perceived fairness of equity, equality, and need when making resource distributions (distributive justice) in intercollegiate athletics. Generally, those involved with intercollegiate athletics believe resource decisions based on equality and need are the most fair, but decisions appear to be based on different principles. Scholars have also begun examining the fairness of decision-making processes (procedural justice) and the communication of those decisions (interactional justice), and how organizational justice impacts organizational outcomes, such as job satisfaction. Additionally, research has expanded to include sport settings beyond intercollegiate athletics. This article summarizes the state of research by first reviewing the general organizational justice literature to conceptually describe the constructs of interest before providing a detailed examination of sport management specific research. The paper concludes with suggestions for future research on organizational justice in sport management

UKIDSS-DR8 LAS, GCS and DXS Surveys (Lawrence+ 2012)

The UKIRT Infrared Deep Sky Survey (UKIDSS) is a large-scale near-IRsurvey which aim is to cover 7500 square degrees of the Northern sky.The survey is carried out using the Wide Field Camera (WFCAM), with afield of view of 0.21 square degrees, mounted on the 3.8m United KingdomInfra-red Telescope (UKIRT) in Hawaii. The project comprises five surveys (LAS, GCS, DXS, GPS and UDS).The Large Area Survey (LAS) covers an area of 4000 square degrees in high Galactic latitudes (extragalactic) in the four bands Y(1.0um)J(1.2um) H(1.6um) and K(2.2um) to a depth of K=18.4.The Galactic Clusters Survey (GCS) aims to survey ten large open starclusters and star formation associations, covering a total of 1067square degrees in the five bands Z (0.9um), Y(1.0um) J(1.2um) H(1.6um)and K(2.2um), plus a second pass in K for proper motions, to a depth ofZ=20.4, Y=20.3, J=19.5, H=18.6, K=18.6.The Deep Extragalactic Survey (DXS) aims to map 35 square degrees of skyto a 5-σ point-source sensitivity of J=22.3 and K=20.8 in four carefully selected, multi-wavelength survey areas. The central regions of each field will also be mapped to H=21.8. The primary aim of the survey is to produce a photometric galaxy sample at a redshift of 1-2,within a volume comparable to that of the SDSS, selected in the same passband (rest frame optical).Details of the surveys can be found in the in the paper by Lawrence etal. (2007MNRAS.379.1599L), and at the UKIDSS Surveys site(http://www.ukidss.org/surveys/surveys.html). The data described here represent a subset of the UKIDSS data, limited to the public data and most representative columns. In the "Byte-by-byte Description" below the original names of the columns are given as bracketed names.(3 data files)