0174 Examining Circadian Disadvantages in the National Basketball Association’s Playoffs

SLEEP ◽  
2020 ◽  
Vol 43 (Supplement_1) ◽  
pp. A69-A69
Author(s):  
S Pradhan ◽  
K Gregory ◽  
D Alton ◽  
R Chachad ◽  
E E Flynn-Evans
Keyword(s):  
Time Zone ◽  
Home Base ◽  
Quality Metric ◽  
Time Zones ◽  
Time Changes ◽  
The Impact

Abstract Introduction Prior research on travel in the National Basketball Association’s (NBA) regular season has shown that teams journeying west relative to their home base face circadian disadvantages for evening games, while those traveling east have advantages. The current study extends previous research by examining these effects within the NBA playoffs. We hypothesized that teams would have a greater circadian advantage during eastward compared to westward travel. Methods In 2013, the NBA implemented a 7-game series playoff structure, in which teams play an alternating home/away 2-2-1-1-1 format. Data for all 499 postseason games played during the 2013–14 to 2018–2019 seasons were collected from Basketball-Reference and FiveThirtyEight. We investigated the impact of direction of travel based on home base city (same time zone, westward, eastward) and time zones traveled on game outcomes, Elo rating differences (i.e., a team quality metric based on wins and losses), win probability, and team scoring. Results Teams had lower win probabilities following 3-hour westward than same time zone and all eastward travel, while 3-hour eastward travel related to higher probabilities of winning compared to same time and all westward travel (p < .001, d > .95). Teams travelling westward with 2-hour time changes lost significantly more games than those experiencing 1-hour westward (p = .04, OR = 2.45), 1-hour eastward (p = .05, OR = 2.34), and 3-hour eastward changes (p = .02, OR = 4.68). Scoring was significantly higher following eastward travel compared to both westward (p = .001, d = 0.60) and same time zone travel (p = .003, d = 0.44). There were no differences in team quality based on direction of travel or number of time zones traveled, and game outcomes based on overall direction of travel (p > .05). Conclusion Direction and magnitude of travel were related to win probability, team scoring, and game outcomes, whereby teams travelling eastward and within the same time zone gained an advantage over those travelling westward. Adjustment to travel and time changes appear to influence in-game performances and outcomes in the NBA playoffs. Support None

294 Impacts of travel and time zone differences in the National Hockey League (NHL)

SLEEP ◽  
2021 ◽  
Vol 44 (Supplement_2) ◽  
pp. A117-A118
Author(s):  
Jonathan Charest ◽  
Charles Samuels ◽  
Célyne Bastien ◽  
Doug Lawson ◽  
Michael Grandner
Keyword(s):  
Elite Athletes ◽  
National Hockey League ◽  
Poor Sleep ◽  
Time Zone ◽  
Winning Percentage ◽  
Increased Risk ◽  
Time Zones ◽  
Logistic Regressions ◽  
And Performance ◽  
The Impact

Abstract Introduction Elite athletes are at risk of poor sleep which can be exacerbated by frequent travel. The present exploratory study investigated the impact of travel on the winning percentage, number of goals scored in the 3rd period and the number of penalties in the 3rd period over the 2013–2020 seasons in the National Hockey League (NHL). Methods Data from away and home games from the 2013–2020 seasons in the NHL were included in this study. The outcomes were based on winning percentage with additional covariates including home and away games; timing of the game (afternoon/17:30 or earlier; evening/18:00 or later; number of time zones travelled (one, two or three); direction of the travel (eastward or westward); length of the game (regular, overtime or shootout). Additionally, data exclusively from the 3rd period were assessed for the number of penalties received and the number of goals scored for and against. Data were analyzed with logistic regressions to evaluate the effects of the aforementioned variables on winning percentage for both eastern and western conference teams. Results Regardless of the length of the game, results indicated no difference between eastern and western teams on winning percentage. However, there was a significant impact of home-ice on winning percentage for both conferences (p<0.001). In addition, there was no difference on the winning percentage based on the travel direction and the number of time zones crossed (p = 0.747) or the time of the day (p=0.991). Moreover, visiting teams received significantly more 3rd period penalties than home teams (p<0.001), regardless of travel and while travelling within the same time zone compared to eastward travel (p<0.001) but not westward travel (p=0.078). Finally, there was an increased risk of being scored against when team travelled three time zones (p=0.03), regardless of the direction. Conclusion This 7-year investigation of data from the NHL demonstrates an unexplored aspect of the impact that travel and circadian factors may have on emotion regulation and performance. Translational application of this knowledge to enhance general public health and performance would be warranted. Support (if any):

Integration & Volatility across Global Indices in different Time Zones: Some Evidence

2019 ◽  
Vol 118 (9) ◽  
pp. 187-192
Author(s):  
Dr.Madavi Eswara
Keyword(s):  
Time Zone ◽  
Global Indices ◽  
Securities Exchanges ◽  
Time Zones ◽  
Test Outcomes ◽  
Multivariate Exponential

  This paper examines the association of value instability crosswise over Global Indices of seven securities exchanges. Utilizing every day information of these seven nations situated in various time zones, this paper attempts to call attention to the nearness of nonsynchronous exchanging impacts utilizing open and close logarithmic returns of seven securities exchange files including Indian Indexat the middle. The hilter kilter effect of unpredictability overflow is analyzed by a multivariate exponential general autoregressive restrictive heteroskedastic model utilizing an example of 1742 perceptions taken from Oct 2011 to November 2018. The test outcomes give out many fascinating actualities alongside cost and unpredictability overflow from one market to the next because of time zone impact and additionally, influence impact is seen from the eastern markets' nearby value child Indian file open cost.

scholarly journals The Importance of Studying Health Behavior in Older Adults

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 827-827
Author(s):  
Jaime Hughes ◽  
Susan Hughes ◽  
Mina Raj ◽  
Janet Bettger
Keyword(s):  
Social Support ◽  
Older Adults ◽  
Behavior Change ◽  
Chronic Conditions ◽  
Population Level ◽  
Multiple Chronic Conditions ◽  
Prior Work ◽  
Time Changes ◽  
The Impact ◽  
Over Time

Abstract Behavior change is an inherent aspect of routine geriatric care. However, most research and clinical programs emphasis how to initiate behavior change with less emphasis placed on skills and strategies to maintain behaviors over time, including after an intervention has concluded. This presentation will provide an introduction to the symposium, including a review of prior work and our rationale for studying the critical yet overlooked construct of maintenance in older adults. Several key considerations in our work include the impact of multiple chronic conditions, declines in cognitive and functional capacity over time, changes in environmental context and/or social support, and sustainability of community and population-level programs and services.

Measuring Circadian Advantage in Major League Baseball: A 10-Year Retrospective Study

2009 ◽  
Vol 4 (3) ◽  
pp. 394-401 ◽  
Author(s):  
W. Christopher Winter ◽  
William R. Hammond ◽  
Noah H. Green ◽  
Zhiyong Zhang ◽  
Donald L. Bliwise
Keyword(s):  
Retrospective Study ◽  
Athletic Performance ◽  
Major League Baseball ◽  
Time Zone ◽  
Winning Percentage ◽  
Circadian Time ◽  
Game Outcome ◽  
Time Zones ◽  
Home Field Advantage ◽  
Major League

Purpose:The effect of travel on athletic performance has been investigated in previous studies. The purpose of this study was to investigate this effect on game outcome over 10 Major League Baseball (MLB) seasons.Methods:Using the convention that for every time zone crossed, synchronization requires 1 d, teams were assigned a daily number indicating the number of days away from circadian resynchronization. With these values, wins and losses for all games could be analyzed based on circadian values.Results:19,079 of the 24,121 games (79.1%) were played between teams at an equal circadian time. The remaining 5,042 games consisted of teams playing at different circadian times. The team with the circadian advantage won 2,620 games (52.0%, P = .005), a winning percentage that exceeded chance but was a smaller effect than home field advantage (53.7%, P < .0001). When teams held a 1-h circadian advantage, winning percentage was 51.7% (1,903–1,781). Winning percentage with a 2-h advantage was 51.8% (620–578) but increased to 60.6% (97–63) with a 3-h advantage (3-h advantage > 2-hadvantage = 1-h advantage, P = .036). Direction of advantage showed teams traveling from Western time zones to Eastern time zones were more likely to win (winning percentage = .530) than teams traveling from Eastern time zones to Western time zones (winning percentage = .509) with a winning odds 1.14 (P = .027).Conclusion:These results suggest that in the same way home field advantage influences likelihood of success, so too does the magnitude and direction of circadian advantage. Teams with greater circadian advantage were more likely to win.

Challenges for Research and Practice in Distributed, Interdisciplinary Collaboration

2006 ◽  
pp. 143-166 ◽  
Author(s):  
Caroline Haythornthwaite ◽  
Karen J. Lunsford ◽  
Geoffrey C. Bowker ◽  
Bertram C. Bruce
Keyword(s):  
Private Sector ◽  
Interdisciplinary Collaboration ◽  
Collaborative Teams ◽  
Team Members ◽  
Research And Practice ◽  
Interdisciplinary Work ◽  
Second Nature ◽  
External Relations ◽  
Time Zones ◽  
The Impact

As private sector and government research increasingly depends on the use of distributed, interdisciplinary and collaborative teams, particularly in scientific endeavors, we are faced also with an increased need to understand how to work in and study such teams. While much attention has been paid to issues of knowledge transfer, the impact of many other consequences of distribution—disparate disciplines, institutions, career paths, time zones and technologies—have been understudied and underestimated. In this chapter, we describe how distributed, interdisciplinary work puts pressure on existing disciplinary, institutional and personal practices—many of which are second nature to team members, and thus easily overlooked. Reflecting on our own and others’ studies of such teams, and our group’s experiences as a distributed, interdisciplinary and collaborative unit, we describe some key challenges facing such teams, including issues relating to working and learning together as experts, defining and crossing boundaries, managing external relations and working with and through technologies.

scholarly journals Utilizing the National Basketball Association’s COVID-19 restart “bubble” to uncover the impact of travel and circadian disruption on athletic performance

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Andrew W. McHill ◽  
Evan D. Chinoy
Keyword(s):  
Athletic Performance ◽  
Natural Experiment ◽  
Circadian Disruption ◽  
Multiple Time ◽  
General Effect ◽  
Professional Basketball ◽  
Home Team ◽  
Winning Percentage ◽  
Time Zones ◽  
The Impact

AbstractOn March 11th, 2020, the National Basketball Association (NBA) paused its season after ~ 64 games due to the Coronavirus 2019 (COVID-19) outbreak, only to resume ~ 5 months later with the top 22 teams isolated together (known as the “bubble”) in Orlando, Florida to play eight games each as an end to the regular season. This restart, with no new travel by teams, provided a natural experiment whereby the impact of travel and home-court advantage could be systematically examined. We show here that in the pre-COVID-19 regular season, traveling across time zones reduces winning percentage, team shooting accuracy, and turnover percentage, whereas traveling in general reduces offensive rebounding and increases the number of points the opposing (home) team scores. Moreover, we demonstrate that competition in a scenario where no teams travel (restart bubble) reduces the typical effects of travel and home-court advantage on winning percentage, shooting accuracy, and rebounding. Thus, home-court advantage in professional basketball appears to be linked with the away team’s impaired shooting accuracy (i.e., movement precision) and rebounding, which may be separately influenced by either circadian disruption or the general effect of travel, as these differences manifest differently when teams travel within or across multiple time zones.

Slaughterhouse-Six: Updating the Law of War

2004 ◽  
Vol 5 (5) ◽  
pp. 525-544 ◽  
Author(s):  
Ed Morgan
Keyword(s):  
Human Rights ◽  
International Law ◽  
The Other ◽  
European Court ◽  
House Of Lords ◽  
Self Interest ◽  
Time Zones ◽  
National Jurisdiction ◽  
State Obligations ◽  
The Impact

International law has come unstuck in time. It has gone to sleep stressing a normative future based on state “obligations owed towards all the other members of the international community,” and has awakened in a bygone world in which the state is “susceptible of no limitation not imposed by itself.” The opposing time zones seem now to exist in unison. Thus, for example, the European Court of Human Rights, in examining the impact of the Torture Convention, can split 9:8 on whether national self-interest trumps universal rules of cooperation, or the other way around. Likewise, England's House of Lords can opine in thePinochetcase that, as between a reinvigorated national jurisdiction and the developing concept of universal one, “international law is on the move.”

A quasi-experimental study of the impact of school start time changes on adolescent sleep

Sleep Health ◽  
2017 ◽  
Vol 3 (6) ◽  
pp. 437-443 ◽  
Author(s):  
Judith A. Owens ◽  
Tracy Dearth-Wesley ◽  
Allison N. Herman ◽  
J. Michael Oakes ◽  
Robert C. Whitaker
Keyword(s):  
Experimental Study ◽  
Start Time ◽  
Adolescent Sleep ◽  
Quasi Experimental ◽  
Time Changes ◽  
The Impact

THE CREATION OF NOVEL AND MARKETABLE SERVICE IDEAS

2011 ◽  
Vol 08 (01) ◽  
pp. 113-133 ◽  
Author(s):  
C. M. CHANG
Keyword(s):  
Virtual Teams ◽  
Cost Effective ◽  
Service Development ◽  
Manufacturing Companies ◽  
Time Zone ◽  
Effective Manner ◽  
Parallel Teams ◽  
Critical Issues ◽  
The Creation ◽  
The Impact

Novel and marketable service ideas are useful to most service enterprises. However, the literature has identified several reasons for innovations in services as lagging behind those in manufacturing. Some service enterprises believe that service ideas and innovations are readily imitated by competitors. Others view the impact of service innovations on profitability difficult to assess because specific innovative service elements are typically bundled with many other service elements when delivered to or used by customers. Some service enterprises do not have in-house groups specifically dedicated to innovative pursuits, making it difficult for them to systematically produce new service ideas. Furthermore, because services are usually produced and consumed concurrently, any failure tends to expose the service enterprise immediately, unlike the manufacturing companies which can minimize such risks of exposure by conducting pilot testing away from the marketplace. As a result, many service enterprises are said to shy away from aggressively pursuing new service development projects. It does not have to be this way. This paper describes the combinatorial, heuristic, and normatively guided method, which when correctly applied to a service enterprise enhances the generation of new service ideas in a systematic, speedy, and cost-effective manner, and without requiring the creation of a dedicated and rigid organizational structure. Virtual teams of the "stealth" type are set up to address innovation needs related to marketability and cost competitiveness. These teams may include frontline customer-facing employees as well as customers, suppliers, and other external experts, who can work together despite geographical and time-zone constraints. The application of this method toward developing a specific new service idea is discussed in greater detail. The integration of a "stealth" team can also be readily applied to the front end of a typical stage-gate service development process, whereby parallel teams are engaged to address critical issues and steps needed to successfully market a service idea before initiating costly development, thereby raising the service enterprises' overall probability of developing commercially successful new services over time.

scholarly journals Time Zones Matter: The Impact of Distance and Time Zones on Services Trade

World Economy ◽  
2015 ◽  
Vol 40 (3) ◽  
pp. 612-631 ◽  
Author(s):  
Elisabeth Christen
Keyword(s):  
Services Trade ◽  
Time Zones ◽  
The Impact
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