scholarly journals Effects of Northbound Long-Haul International Air Travel on Sleep Quantity and Subjective Jet Lag and Wellness in Professional Australian Soccer Players

2015 ◽  
Vol 10 (5) ◽  
pp. 648-654 ◽  
Author(s):  
Peter Fowler ◽  
Rob Duffield ◽  
Kieran Howle ◽  
Adam Waterson ◽  
Joanna Vaile
Keyword(s):  
Air Travel ◽  
Soccer Players ◽  
Sleep Disruption ◽  
Jet Lag ◽  
Time Zone ◽  
Sleep Quantity ◽  
Time Points ◽  
Departure Time ◽  
Australian Football ◽  
Home Training

The current study examined the effects of 10-h northbound air travel across 1 time zone on sleep quantity, together with subjective jet lag and wellness ratings, in 16 male professional Australian football (soccer) players. Player wellness was measured throughout the week before (home training week) and the week of (away travel week) travel from Australia to Japan for a preseason tour. Sleep quantity and subjective jet lag were measured 2 d before (Pre 1 and 2), the day of, and for 5 d after travel (Post 1–5). Sleep duration was significantly reduced during the night before travel (Pre 1; 4.9 [4.2−5.6] h) and night of competition (Post 2; 4.2 [3.7−4.7] h) compared with every other night (P < .01, d > 0.90). Moreover, compared with the day before travel, subjective jet lag was significantly greater for the 5 d after travel (P < .05, d > 0.90), and player wellness was significantly lower 1 d postmatch (Post 3) than at all other time points (P < .05, d > 0.90). Results from the current study suggest that sleep disruption, as a result of an early travel departure time (8 PM) and evening match (7:30 PM), and fatigue induced by competition had a greater effect on wellness ratings than long-haul air travel with a minimal time-zone change. Furthermore, subjective jet lag may have been misinterpreted as fatigue from sleep disruption and competition, especially by the less experienced players. Therefore, northbound air travel across 1 time zone from Australia to Asia appears to have negligible effects on player preparedness for subsequent training and competition.

Effects of Domestic Air Travel on Technical and Tactical Performance and Recovery in Soccer

2014 ◽  
Vol 9 (3) ◽  
pp. 378-386 ◽  
Author(s):  
Peter Fowler ◽  
Rob Duffield ◽  
Joanna Vaile
Keyword(s):  
Performance Indicators ◽  
Study Data ◽  
Air Travel ◽  
Soccer Players ◽  
Psychological State ◽  
Sleep Quantity ◽  
Situational Variables ◽  
Before And After ◽  
Individual Player ◽  
Australian Football

The current study examined the effects of short-haul air travel on competition performance and subsequent recovery. Six male professional Australian football (soccer) players were recruited to participate in the study. Data were collected from 12 matches, which included 6 home and away matches against the same 4 teams. Together with the outcome of each match, data were obtained for team technical and tactical performance indicators and individual player-movement patterns. Furthermore, sleep quantity and quality, hydration, and perceptual fatigue were measured 2 days before, the day of, and 2 days after each match. More competition points were accumulated (P > .05, d = 1.10) and fewer goals were conceded (P > .05, d = 0.93) in home than in away matches. Furthermore, more shots on goal (P > .05, d = 1.17) and corners (P > .05, d = 1.45) and fewer opposition shots on goal (P > .05, d = 1.18) and corners (P < .05, d = 2.32) occurred, alongside reduced total distance covered (P > .05, d = 1.19) and low-intensity activity (P < .05, d = 2.25) during home than during away matches. However, while oxygen saturation was significantly lower during than before and after outbound and return travel (P < .01), equivocal differences in sleep quantity and quality, hydration, and perceptual fatigue were observed before and after competition away compared with home. These results suggest that, compared with short-haul air travel, factors including situational variables, territoriality, tactics, and athlete psychological state are more important in determining match outcome. Furthermore, despite the potential for disrupted recovery patterns, return travel did not impede player recovery or perceived readiness to train.

The Impact of "Jet Lag" on the AFL Point Spread Wagering Market

2019 ◽  
Author(s):  
Adi Schnytzer ◽  
ALBERT HIZGILOV
Keyword(s):  
A Priori ◽  
Multiple Time ◽  
Jet Lag ◽  
Time Zone ◽  
Lag Effects ◽  
Home Team ◽  
Point Spread ◽  
Australian Football League ◽  
Australian Football ◽  
The Impact

This paper examines the presence of "jet-lag" effects in the Australian Football League point spread betting market. Fodor and Krieger’s (2014) findings that bookmakers, in NFL betting markets, do not consider efficiently the possible impact of jet lag on team performance, and are unable to take into account the possible existence of a potentially confounding home team bias since in virtually all games in the NFL, one of the teams has an a priori home ground advantage. Schnytzer and Weinberg (2008) took advantage of the distinctive feature of the Australian Football League (AFL), that many fixtures take place on neutral grounds, to demonstrate the apparent existence of a home team bias and the absence of a favorite-longshot bias. We conduct standard econometric tests of market efficiency over games where the home team bias cannot, by definition, exist. We used the 2001-2016 AFL seasons including the final series matches, venues, and betting information data and found no statistically significant line inefficiency in the games played on neutral grounds, regardless of whether the visiting team travels across multiple time zones in either direction or whether neither team requires a flight to reach the relevant stadium. However, line inefficiencies were found in overall games in which the home team enjoys an a priori home ground advantage. Such inefficiencies occur both in games where the visiting team experiences time zone changes when traveling to the game, and in games where the visiting team experiences no such changes. The amalgamated results for both neutral games and home bias games makes clear that jet lag cannot serve as a sole factor leading to inefficiencies but merely if combined with the home team bias. We show that betting on games in various inefficient sub-groups yields returns between 1.26 and 8.07 percent.

scholarly journals Sleep, Travel, and Recovery Responses of National Footballers During and After Long-Haul International Air Travel

2016 ◽  
Vol 11 (1) ◽  
pp. 86-95 ◽  
Author(s):  
Hugh H.K. Fullagar ◽  
Rob Duffield ◽  
Sabrina Skorski ◽  
David White ◽  
Jonathan Bloomfield ◽  
...  
Keyword(s):  
Sleep Duration ◽  
Air Travel ◽  
International Travel ◽  
Football Players ◽  
Jet Lag ◽  
Time Zone ◽  
The United Kingdom ◽  
Sleep Parameters ◽  
Observational Design ◽  
Small Change

Purpose:The current study examined the sleep, travel, and recovery responses of elite footballers during and after long-haul international air travel, with a further description of these responses over the ensuing competitive tour (including 2 matches).Methods:In an observational design, 15 elite male football players undertook 18 h of predominantly westward international air travel from the United Kingdom to South America (–4-h time-zone shift) for a 10-d tour. Objective sleep parameters, external and internal training loads, subjective player match performance, technical match data, and perceptual jet-lag and recovery measures were collected.Results:Significant differences were evident between outbound travel and recovery night 1 (night of arrival; P < .001) for sleep duration. Sleep efficiency was also significantly reduced during outbound travel compared with recovery nights 1 (P = .001) and 2 (P = .004). Furthermore, both match nights (5 and 10), showed significantly less sleep than nonmatch nights 2 to 4 and 7 to 9 (all P < .001). No significant differences were evident between baseline and any time point for all perceptual measures of jet-lag and recovery (P > .05), although large effects were evident for jet-lag on d 2 (2 d after arrival).Conclusions:Sleep duration is truncated during long-haul international travel with a 4-h time-zone delay and after night matches in elite footballers. However, this lost sleep appeared to have a limited effect on perceptual recovery, which may be explained by a westbound flight and a relatively small change in time zones, in addition to the significant increase in sleep duration on the night of arrival after the long-haul flight.

scholarly journals Recovery-Stress Response of Blood-Based Biomarkers

2021 ◽  
Vol 18 (11) ◽  
pp. 5776
Author(s):  
Sebastian Hacker ◽  
Thomas Reichel ◽  
Anne Hecksteden ◽  
Christopher Weyh ◽  
Kristina Gebhardt ◽  
...  
Keyword(s):  
Calcium Binding ◽  
Tissue Repair ◽  
Elite Athletes ◽  
Venous Blood ◽  
Soccer Players ◽  
Recovery Stress ◽  
Blood Samples ◽  
Time Points ◽  
S100 Calcium Binding Protein ◽  
Stress States

The purpose of this study was to investigate blood-based biomarkers and their regulation with regard to different recovery-stress states. A total of 35 male elite athletes (13 badminton, 22 soccer players) were recruited, and two venous blood samples were taken: one in a ‘recovered’ state (REC) after a minimum of one-day rest from exercise and another one in a ‘non-recovered’ state (NOR) after a habitual loading microcycle. Overall, 23 blood-based biomarkers of different physiologic domains, which address inflammation, muscle damage, and tissue repair, were analyzed by Luminex assays. Across all athletes, only creatine kinase (CK), interleukin (IL-) 6, and IL-17A showed higher concentrations at NOR compared to REC time points. In badminton players, higher levels of CK and IL-17A at NOR were found. In contrast, a higher value for S100 calcium-binding protein A8 (S100A8) at REC was found in badminton players. Similar differences were found for BDNF in soccer players. Soccer players also showed increased levels of CK, and IL-6 at NOR compared to REC state. Several molecular markers were shown to be responsive to differing recovery-stress states, but their suitability as biomarkers in training must be further validated.

Sleep quantity and quality ineliteyouth soccer players: A pilot study

2013 ◽  
Vol 14 (5) ◽  
pp. 410-417 ◽  
Author(s):  
Elisa Robey ◽  
Brian Dawson ◽  
Shona Halson ◽  
Warren Gregson ◽  
Carmel Goodman ◽  
...  
Keyword(s):  
Pilot Study ◽  
Soccer Players ◽  
Sleep Quantity

scholarly journals Effects of Two Competitive Soccer Matches on Landing Biomechanics in Female Division I Soccer Players

Sports ◽  
2019 ◽  
Vol 7 (11) ◽  
pp. 237
Author(s):  
Benjamin J. Snyder ◽  
Randolph E. Hutchison ◽  
Christopher J. Mills ◽  
Stephen J. Parsons
Keyword(s):  
Shear Force ◽  
Reaction Force ◽  
Knee Extension ◽  
Soccer Players ◽  
Control Group ◽  
Initial Contact ◽  
Time Points ◽  
Landing Biomechanics ◽  
Isometric Knee Extension ◽  
Before And After

Fatigue has been proposed to increase the risk of knee injury. This study tracked countermovement jump, knee isometric strength, and kinetics and kinematics in 8 female soccer players (experimental group) during an anticipated sidestep maneuver before and after two matches played over a 43-h period. Time points were: Before and after match 1 (T0 and T1), 12 h after the first match (T2), and immediately after the second match (T3). A control group participated only in practice sessions. Isometric knee extension strength decreased by 14.8% at T2 (p = 0.003), but knee flexion was not affected until T3, declining by 12.6% (p = 0.018). During the sidestep maneuver, knee joint degrees of flexion at initial contact was increased by 17.1% at T3, but maximum knee and hip angle at initial contact were unchanged. Peak resultant ground reaction force (GRF) increased by 12.6% (p = 0.047) at T3 (3.03 xBW) from 2.69 xBW at T0, while posterior GRF was significantly higher than T0 at all three subsequent time points (T1 = 0.82 ± 0.23 xBW, T2 = 0.87 ± 0.22 xBW, T3 = 0.89 ± 0.22 xBW). Anterior tibial shear force increased significantly (p = 0.020) at T3 (1.24 ± 0.12 xBW) compared to T1 (1.15 ± 0.13 xBW), an 8.8% increase. Lateral tibial shear force was significantly higher at both T1 (0.95 ± 0.20 xBW) and T3 (1.15 ± 0.38 xBW) compared to T0 (0.67 ± 0.25 xBW). These findings suggest that participation in a soccer match has significant effects on both physical performance parameters and kinetics/kinematics during a sidestep cut, but these can be more pronounced after a second match with short rest.

scholarly journals Home training recommendations for soccer players during the COVID-19 pandemic

2021 ◽  
Vol 20 (5) ◽  
pp. 574-584
Author(s):  
Angelo Melim Azevedo ◽  
Gregory Halle Petiot ◽  
Filipe Manuel Clemente ◽  
Fábio Yuzo Nakamura ◽  
Maxwell Viana Moraes-Neto ◽  
...  
Keyword(s):  
Perceived Exertion ◽  
Rating Of Perceived Exertion ◽  
Soccer Players ◽  
Professional Activities ◽  
Home Based ◽  
Tactical Training ◽  
Home Training ◽  
The Postponement ◽  
Isolation Period ◽  
Practical Recommendations

This pandemic of COVID-19 has a major impact on people's lives, and several governments ordered extended quarantine and requested social isolation to contain the spread of COVID-19 and flatten its contagion curve. Soccer practice was also severely affected by these pandemic effects, including the postponement of several championships, which involve large audiences. In Brazil, the professional leagues restart the official matches (e.g., Brazilian National Fourth, Third, Second, and First Divisions Leagues). However, some youth academies have not yet restarted their professional activities. Therefore, home-based training can be a good option in these cases. Here, we outline the benefits of home workouts using a multidimensional approach. First, we provide practical recommendations for physical, psychological, and tactical training. Next, we propose an example of a home training program spanning one weekly microcycle for soccer players, using load control based on the rating of perceived exertion. We highlighted that is crucial to make all these exercises fun and entertaining during the self-isolation period. The home training recommendations discussed and proposed in this research can and should be adjusted by the coaches according to their own ideas and athletes' access to equipment (e.g., treadmills, flywheel training, virtual reality).

scholarly journals Jet Lag From A Physics Point Of View

2012 ◽  
Vol 3 (4) ◽  
pp. 287-290
Author(s):  
Wathiq Abdul-Razzaq ◽  
R. Dale Biller
Keyword(s):  
Biological Clock ◽  
Air Travel ◽  
Point Of View ◽  
Jet Lag ◽  
Induced Voltage ◽  
Dark Light ◽  
The Earth ◽  
The Common ◽  
The Brain ◽  
The Magnetic Field

While the common believe is that dark/light timing causes jet lag, we argue that physics, not the biological clock, may be the main reason for this air travel disorder. We explored the change in voltage in the human brain due to the added voltage induced by flying over the magnetic field of the Earth, and we think that this induced voltage in the brain is significant enough to cause neurological changes that may trigger jet lag or other illnesses.

scholarly journals 0459 Is It Having a Baby or Me? Differentiating Insomnia Disorder and Sleep Disruption from Pregnancy to 2 Years Postpartum

SLEEP ◽  
2020 ◽  
Vol 43 (Supplement_1) ◽  
pp. A176-A176
Author(s):  
N Quin ◽  
J Lee ◽  
D M Pinnington ◽  
L Shen ◽  
R Manber ◽  
...  
Keyword(s):  
Specific Treatment ◽  
Structured Interview ◽  
Sleep Disruption ◽  
Depression And Anxiety ◽  
Sleep Complaints ◽  
Time Points ◽  
Maternal Sleep ◽  
Insomnia Disorder ◽  
Pregnancy And Postpartum ◽  
Sleep Condition

Abstract Introduction Insomnia Disorder (Insomnia) diagnosis requires sleep complaints to persist despite “sleep-conducive conditions and adequate sleep opportunity”. Women experience significant sleep disruption during pregnancy and postpartum periods due to physiological changes and night-time infant care, but not all women with sleep complaints meet Insomnia criteria. This study examined sleep and mental health correlates of Insomnia Disorder and sleep complaints in the context of a randomised controlled trial for improving maternal sleep. Methods 163 generally healthy first-time mothers (age M±SD=33.4±3.5) with singleton pregnancy repeated the following assessments at 28-30 and 35-36 weeks’ gestation, and 1.5, 3, 6, 12, and 24 months postpartum: the Insomnia module of the Duke Structured Interview for Sleep Disorders, PROMIS Sleep-Related Impairment, Depression, and Anxiety Short Forms. We compared clinical features when DSM-5 Insomnia criteria (less the 3-month criteria) were (1) met (Insomnia), (2) not met only because of the sleep condition/opportunity criteria (Sleep Disruption), and (3) not met due to low symptom/distress (Low Complaint). Results 944 interviews and 1009 questionnaire were collected across 7 time-points. Proportions of women meeting Insomnia criteria were 16.0% and 19.8% during early and late third trimester, and ranged 5.3-11.7% during the 5 postpartum time-points. If the sleep condition/opportunity criteria were not considered, rates of “Insomnia” would have been 2-4 times higher at 21.4-40.4% across all time-points. Mixed effects models, controlling for intervention allocation, showed that compared with Insomnia, Sleep Disruption had comparable depression (p=.68) and anxiety (p=.23), and somewhat lower sleep-related impairment (p=.06). These symptoms were lowest for Low Complaint. Conclusion Both Insomnia and Sleep Disruption were associated with significant daytime impairment, depression, and anxiety. Assessing sleep complaints without considering sleep condition/opportunity can result in over-diagnosis of perinatal Insomnia in these women with primarily sleep disruption; these women may have limited benefits from Insomnia-specific treatment. Interventions for maternal sleep should carefully differentiate between Insomnia and other sleep concerns (e.g., sleep disruption/opportunity, sleepiness/fatigue) and appropriately address each. Support Australasian Sleep Association, Monash University, Royal Women’s Hospital Foundation. National Health and Medical Research Council, Department of Education and Training.

Time-zone travel, jet lag and sleep disturbances

2008 ◽  
pp. 467-479
Author(s):  
Thomas Reilly ◽  
Jim Waterhouse
Keyword(s):  
Sleep Disturbances ◽  
Jet Lag ◽  
Time Zone
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