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https://www.readbyqxmd.com/read/29740346/can-sleep-be-used-as-an-indicator-of-overreaching-and-overtraining-in-athletes
#1
Michele Lastella, Grace E Vincent, Rob Duffield, Gregory D Roach, Shona L Halson, Luke J Heales, Charli Sargent
No abstract text is available yet for this article.
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29651858/sleep-related-issues-for-recovery-and-performance-in-athletes
#2
Sarah Kölling, Rob Duffield, Daniel Erlacher, Ranel Venter, Shona L Halson
The body of research that reports the relevance of sleep in high-performance sports is growing steadily. While the identification of sleep cycles and diagnosis of sleep disorders is limited to lab-based assessment via polysomnography, the development of activity-based devices estimating sleep patterns provides greater insight into the sleep behaviour of athletes in ecological settings. Overall, small sleep quantity and/or poor quality appears to exist in many athletic populations, though this may be related to training and competition context...
April 13, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29444097/the-effects-of-intensified-training-on-resting-metabolic-rate-rmr-body-composition-and-performance-in-trained-cyclists
#3
Amy L Woods, Anthony J Rice, Laura A Garvican-Lewis, Alice M Wallett, Bronwen Lundy, Margot A Rogers, Marijke Welvaert, Shona Halson, Andrew McKune, Kevin G Thompson
BACKGROUND: Recent research has demonstrated decreases in resting metabolic rate (RMR), body composition and performance following a period of intensified training in elite athletes, however the underlying mechanisms of change remain unclear. Therefore, the aim of the present study was to investigate how an intensified training period, designed to elicit overreaching, affects RMR, body composition, and performance in trained endurance athletes, and to elucidate underlying mechanisms. METHOD: Thirteen (n = 13) trained male cyclists completed a six-week training program consisting of a "Baseline" week (100% of regular training load), a "Build" week (~120% of Baseline load), two "Loading" weeks (~140, 150% of Baseline load, respectively) and two "Recovery" weeks (~80% of Baseline load)...
2018: PloS One
https://www.readbyqxmd.com/read/29431593/caffeine-use-in-a-super-rugby-game-and-its-relationship-to-post-game-sleep
#4
Ian C Dunican, Charles C Higgins, Maddison J Jones, Michael W Clarke, Kevin Murray, Brian Dawson, John A Caldwell, Shona L Halson, Peter R Eastwood
OBJECTIVE: To examine the relationship between regular game-related caffeine consumption on sleep after an evening Super Rugby game. METHODS: Twenty elite rugby union players wore a wrist-activity monitor to measure sleep for three days before, three days after and on the night of an evening Super Rugby game (19:00-21:00). Players ingested caffeine as they would normally (i.e. before and sometimes during a game) and saliva samples were collected before (17:00) and after (21:30) the game for caffeine concentration...
February 12, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29384434/the-psychomotor-vigilance-test-a-comparison-of-different-test-durations-in-elite-athletes
#5
Maddison J Jones, Ian C Dunican, Kevin Murray, Peter Peeling, Brian Dawson, Shona Halson, Joanna Miller, Peter R Eastwood
The 10-min Psychomotor Vigilance Test (PVT-10) is regarded as the gold-standard for assessing vigilant attention following sleep loss; however, other studies have investigated whether shorter versions of the test elicit similar results to the PVT-10. The present study compared the PVT-10 with 3-min (PVT-3) and 5-min (PVT-5) versions of the test in elite female basketball players. Athletes performed all three tests in the morning and evening for seven consecutive days. Response speed (mean reciprocal reaction time; mean 1/RT), number of errors and number of lapses were determined for each test and time point...
January 31, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29345524/recovery-and-performance-in-sport-consensus-statement
#6
Michael Kellmann, Maurizio Bertollo, Laurent Bosquet, Michel Brink, Aaron Coutts, Rob Duffield, Daniel Erlacher, Shona Halson, Anne Hecksteden, Jahan Heidari, Romain Meeusen, Iñigo Mujika, Claudio Robazza, Sabrina Skorski, Ranel Venter, Jürgen Beckmann
The relationship between recovery and fatigue and its impact on performance has attracted the interest of sports science for many years. An adequate balance between stress (training and competition load, other life demands) and recovery is essential for athletes to achieve continuous high-level performance. Research has focused on the examination of physiological and psychological recovery strategies to compensate external and internal training and competition loads. A systematic monitoring of recovery and the subsequent implementation of recovery routines aims at maximizing performance and preventing negative developments such as underrecovery, non-functional overreaching, the overtraining syndrome, injuries, or illnesses...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29283744/core-temperature-responses-to-cold-water-immersion-recovery-a-pooled-data-analysis
#7
Jessica M Stephens, Ken Sharpe, Christopher Gore, Joanna Miller, Gary J Slater, Nathan Versey, Jeremiah Peiffer, Rob Duffield, Geoffrey M Minett, David Crampton, Alan Dunne, Christopher D Askew, Shona L Halson
PURPOSE: To examine the effect of post-exercise cold water immersion (CWI) protocols compared with control (CON), on the magnitude and time-course of core temperature (Tc ) responses. METHODS: Pooled data analyses were used to examine the Tc responses of 157 subjects from previous post-exercise CWI trials in our laboratories. CWI protocols varied with different combinations of temperature, duration, immersion depth and mode (continuous vs intermittent). Tc was examined as a double difference (ΔΔTc ), calculated as the change in Tc in CWI condition minus the corresponding change in CON...
December 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29238263/sleep-wake-behaviours-in-elite-athletes-from-three-different-football-codes
#8
Dean J Miller, Charli Sargent, Grace E Vincent, Gregory D Roach, Shona L Halson, Michele Lastella
No abstract text is available yet for this article.
December 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29056598/prevalence-of-illness-poor-mental-health-and-sleep-quality-and-low-energy-availability-prior-to-the-2016-summer-olympic-games
#9
Michael Drew, Nicole Vlahovich, David Hughes, Renee Appaneal, Louise M Burke, Bronwen Lundy, Margot Rogers, Mary Toomey, David Watts, Gregory Lovell, Stephan Praet, Shona L Halson, Candice Colbey, Silvia Manzanero, Marijke Welvaert, Nicholas P West, David B Pyne, Gordon Waddington
OBJECTIVE: Establish the prevalence of illness symptoms, poor sleep quality, poor mental health symptoms, low energy availability and stress-recovery state in an Olympic cohort late in the 3 months prior to the Summer Olympic Games. METHODS: Olympic athletes (n=317) from 11 sports were invited to complete questionnaires administered 3 months before the Rio 2016 Olympic Games. These questionnaires included the Depression, Anxiety and Stress Questionnaire, Perceived Stress Scale, Dispositional Resilience Scale, Recovery-Stress Questionnaire (REST-Q-52 item), Low Energy Availability in Females Questionnaire (LEAF-Q), Epworth Sleepiness Scale, Pittsburgh Sleep Quality Index and custom-made questionnaires on probiotic usage and travel...
January 2018: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29031461/sleep-sport-and-the-brain
#10
Shona L Halson, Laura E Juliff
The recognition that sleep is one of the foundations of athlete performance is increasing both in the elite athlete arena as well as applied performance research. Sleep, as identified through sleep deprivation and sleep extension investigations, has a role in performance, illness, injury, metabolism, cognition, memory, learning, and mood. Elite athletes have been identified as having poorer quality and quantity of sleep in comparison to the general population. This is likely the result on training times, competition stress/anxiety, muscle soreness, caffeine use, and travel...
2017: Progress in Brain Research
https://www.readbyqxmd.com/read/28910543/intra-individual-variability-in-the-sleep-of-senior-and-junior-rugby-league-athletes-during-the-competitive-season
#11
Johnpaul Caia, Shona L Halson, Tannath J Scott, Vincent G Kelly
This study examined the sleep intra-individual variability (IIV) of rugby league athletes across senior and junior levels during one week of the competitive season. Forty-five rugby league athletes across elite senior, sub-elite senior and elite junior levels each wore actigraphy monitors for seven days during the competitive season, and completed a subjective sleep diary each morning upon waking. Linear mixed models were used to assess differences in sleep measures between playing levels. Intra-individual standard deviations for each sleep measure were calculated for each athlete to determine their respective IIV, allowing differences in IIV between groups to be assessed...
2017: Chronobiology International
https://www.readbyqxmd.com/read/28855419/protein-ingestion-before-sleep-increases-overnight-muscle-protein-synthesis-rates-in-healthy-older-men-a-randomized-controlled-trial
#12
RANDOMIZED CONTROLLED TRIAL
Imre Wk Kouw, Andrew M Holwerda, Jorn Trommelen, Irene Fleur Kramer, Jacqueline Bastiaanse, Shona L Halson, Will Kwh Wodzig, Lex B Verdijk, Luc Jc van Loon
Background: The loss of skeletal muscle mass with aging has been attributed to the blunted anabolic response to protein intake. Presleep protein ingestion has been suggested as an effective strategy to compensate for such anabolic resistance. Objective: We assessed the efficacy of presleep protein ingestion on dietary protein digestion and absorption kinetics and overnight muscle protein synthesis rates in older men. Methods: In a randomized, double-blind, parallel design, 48 older men (mean ± SEM age: 72 ± 1 y) ingested 40 g casein (PRO40), 20 g casein (PRO20), 20 g casein plus 1...
December 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28719491/greater-effect-of-east-versus-west-travel-on-jet-lag-sleep-and-team-sport-performance
#13
Peter M Fowler, Wade Knez, Stephen Crowcroft, Amy E Mendham, Joanna Miller, Charlie Sargent, Shona Halson, Rob Duffield
PURPOSE: This study aimed to determine the recovery timeline of sleep, subjective jet lag and fatigue, and team sport physical performance after east and west long-haul travel. METHODS: Ten physically trained men underwent testing at 0900 h and 1700 h local time on four consecutive days 2 wk before outbound travel (BASE), and the first 4 d after 21 h of outbound (WEST) and return (EAST) air travel across eight time zones between Australia and Qatar. Data collection included performance (countermovement jump, 20-m sprint, and Yo-Yo intermittent recovery level 1 [YYIR1] test) and perceptual (jet lag, motivation, perceived exertion, and physical feeling) measures...
December 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28703035/influence-of-body-composition-on-physiological-responses-to-post-exercise-hydrotherapy
#14
Jessica M Stephens, Shona L Halson, Joanna Miller, Gary J Slater, Christopher D Askew
This study examined the influence of body composition on temperature and blood flow responses to post-exercise cold water immersion (CWI), hot water immersion (HWI) and control (CON). Twenty-seven male participants were stratified into three groups: 1) low mass and low fat (LM-LF); 2) high mass and low fat (HM-LF); or 3) high mass and high fat (HM-HF). Experimental trials involved a standardised bout of cycling, maintained until core temperature reached 38.5°C. Participants subsequently completed one of three 15-min recovery interventions (CWI, HWI, or CON)...
May 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28585467/do-players-and-staff-sleep-more-during-the-pre-or-competitive-season-of-elite-rugby-league
#15
Johnpaul Caia, Tannath J Scott, Shona L Halson, Vincent G Kelly
This study establishes the sleep behaviour of players and staff during the pre- and competitive seasons of elite rugby league. For seven days during both the pre- and competitive seasons, seven rugby league players and nine full-time staff from one professional Australian rugby league club had their sleep monitored via wrist actigraphy and self-report sleep diaries. Two-way repeated measures analysis of variance determined differences between the pre- and competitive season in players and staff, with effect sizes (ES) used to interpret the practical magnitude of differences...
September 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28536184/pre-sleep-dietary-protein-derived-amino-acids-are-incorporated-in-myofibrillar-protein-during-post-exercise-overnight-recovery
#16
Jorn Trommelen, Imre W K Kouw, Andrew M Holwerda, Tim Snijders, Shona L Halson, Ian Rollo, Lex B Verdijk, Luc J C van Loon
The purpose of this study was to determine the impact of ingesting 30 g casein protein with and without 2 g free leucine prior to sleep on myofibrillar protein synthesis rates during post-exercise overnight recovery. 36 healthy young males performed a single bout of resistance-type exercise in the evening (19:45 h) after a full day of dietary standardization. Thirty min prior to sleep (23:30 h), subjects ingested 30 g intrinsically L-[1-13 C]-phenylalanine-labeled protein with (PRO+leu, n=12) or without (PRO, n=12) 2 g free leucine, or a noncaloric placebo (PLA, n=12)...
May 23, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28422546/no-compromise-of-competition-sleep-compared-with-habitual-sleep-in-elite-australian-footballers
#17
Benita J Lalor, Shona L Halson, Jacqueline Tran, Justin G Kemp, Stuart J Cormack
PURPOSE: To assess the impact of match-start time and days relative to match compared with the habitual sleep characteristics of elite Australian Football (AF) players. METHODS: 45 elite male AF players were assessed during the preseason (habitual) and across 4 home matches during the season. Players wore an activity monitor the night before (-1), night of (0), 1 night after (+1), and 2 nights (+2) after each match and completed a self-reported rating of sleep quality...
January 1, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28385561/a-multifactorial-evaluation-of-illness-risk-factors-in-athletes-preparing-for-the-summer-olympic-games
#18
Michael K Drew, Nicole Vlahovich, David Hughes, Renee Appaneal, Kirsten Peterson, Louise Burke, Bronwen Lundy, Mary Toomey, David Watts, Gregory Lovell, Stephan Praet, Shona Halson, Candice Colbey, Silvia Manzanero, Marijke Welvaert, Nic West, David B Pyne, Gordon Waddington
OBJECTIVES: Illness can disrupt training and competition performance of athletes. Few studies have quantified the relative contribution of the known medical, behavioural and lifestyle risk factors. DESIGN: Cross-sectional. METHODS: Olympic athletes from 11 sports (n=221) were invited to complete questionnaires administered nine months before the Rio 2016 Olympic Games. These included the Depression, Anxiety and Stress Questionnaire (DASS-21), Perceived Stress Scale (PSS), Dispositional Resilience Scale (DRS), Recovery-Stress Questionnaire (REST-Q-52 item), Low Energy in Females Questionnaire (LEAF-Q), a modified Personal and Household Hygiene questionnaire, Epworth Sleepiness Scale, Pittsburgh Sleep Quality Index, and custom-made questionnaires on probiotic usage and travel...
March 21, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28282750/evening-electronic-device-use-the-effects-on-alertness-sleep-and-next-day-physical-performance-in-athletes
#19
Maddison J Jones, Peter Peeling, Brian Dawson, Shona Halson, Joanna Miller, Ian Dunican, Michael Clarke, Carmel Goodman, Peter Eastwood
The aim of the present study was to investigate the influence of different types of tasks performed with or without an electronic device (tablet) on pre-sleep alertness, subsequent sleep quality and next-day athletic performance. Eight highly trained netball players attended a sleep laboratory for pre-sleep testing, polysomnographic sleep monitoring and next-day physical performance testing on 5 separate occasions (1 familiarisation and 4 experimental sessions). For 2 h prior to bedtime, athletes completed cognitively stimulating tasks (puzzles) or passive tasks (reading) with or without a tablet...
January 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28250934/team-sport-athletes-perceptions-and-use-of-recovery-strategies-a-mixed-methods-survey-study
#20
Fiona Crowther, Rebecca Sealey, Melissa Crowe, Andrew Edwards, Shona Halson
BACKGROUND: A variety of recovery strategies are used by athletes, although there is currently no research that investigates perceptions and usage of recovery by different competition levels of team sport athletes. METHODS: The recovery techniques used by team sport athletes of different competition levels was investigated by survey. Specifically this study investigated if, when, why and how the following recovery strategies were used: active land-based recovery (ALB), active water-based recovery (AWB), stretching (STR), cold water immersion (CWI) and contrast water therapy (CWT)...
2017: BMC Sports Science, Medicine and Rehabilitation
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