| 1. |
|
|
| 2. |
|
|
| 3. |
- Dunlop, Gordon, et al.
(författare)
-
Examination of the validity of the Injury-Psychological Readiness to Return to Sport (I-PRRS) scale in male professional football players : A worldwide study of 29 professional teams
- 2024
-
Ingår i: Journal of Sports Sciences. - Abingdon, Oxon : Routledge. - 0264-0414 .- 1466-447X. ; , s. 1-9
-
Tidskriftsartikel (refereegranskat)abstract
- Perceived confidence is an important dimension of an athlete’s psychological readiness to return-to-play. However, there is no established and validated tool to evaluate confidence in professional football. This study aimed to provide preliminary evaluation of the internal structure of the Injury-Psychological Readiness to Return-to-Sport scale (I-PRRS) in a cohort of injured male professional footballers. Over an 18-month period, 29 teams from 17 leagues participated. Players sustaining injuries eliciting (Formula presented.) 3 weeks’ time-loss were recruited. Cross culturally adapted to 4 further languages, the I-PRRS was administered on two occasions: 1) day before returning-to-training and 2) day before returning-to-match-play. In total, 113 injuries were recorded with 96 completed I-PRRS data sets collected. Confirmatory factor analysis indicated the I-PRRS was a unidimensional scale, with all items measuring the same construct. The scale demonstrated good internal consistency (ω =.88). When examining longitudinal invariance of the I-PRRS across administration time-points, indices of model fit supported scalar invariance. There was preliminary evidence of good internal structure for the I-PRRS in professional male footballers. However, before further research involving the I-PRRS can be endorsed, efforts to confirm or refute empirical developments pertaining to psychological readiness are necessary. © 2024 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
|
|
| 4. |
- Dunlop, Gordon, et al.
(författare)
-
Return-to-Play Practices Following Hamstring Injury: A Worldwide Survey of 131 Premier League Football Teams
- 2020
-
Ingår i: Sports Medicine. - : ADIS INT LTD. - 0112-1642 .- 1179-2035. ; 50:4, s. 829-840
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose Return-to-play (RTP) is an on-going challenge in professional football. Return-to-play related research is increasing. However, it is unknown to what extent the recommendations presented within research are being implemented by professional football teams, and where there are gaps between research and practice. The purposes of this study were (1) to determine if premier-league football teams worldwide follow a RTP continuum, (2) to identify RTP criteria used and (3) to understand how RTP decision-making occurs in applied practice. Methods We sent a structured online survey to practitioners responsible for the RTP programme in 310 professional teams from 34 premier-leagues worldwide. The survey comprised four sections, based on hamstring muscle injury: (1) criteria used throughout RTP phases, (2) the frequency with which progression criteria were achieved, (3) RTP decision-making process and (4) challenges to decision-making. Results One-hundred and thirty-one teams responded with a completed survey (42%). One-hundred and twenty-four teams (95%) used a continuum to guide RTP, assessing a combination of clinical, functional and psychological criteria to inform decisions to progress. One-hundred and five (80%) teams reported using a shared decision-making approach considering the input of multiple stakeholders. Team hierarchy, match- and player-related factors were common challenges perceived to influence decision-making. Conclusions General research recommendations for RTP and the beliefs and practices of practitioners appear to match with, the majority of teams assessing functional, clinical and psychological criteria throughout a RTP continuum to inform decision-making which is also shared among key stakeholders. However, specific criteria, metrics and thresholds used, and the specific involvement, dynamics and interactions of staff during decision-making are not clear.
|
|
| 5. |
|
|
| 6. |
|
|
| 7. |
- McCall, Alan, et al.
(författare)
-
A Qualitative Study of 11 World-Class Team-Sport Athletes’ Experiences Answering Subjective Questionnaires : A Key Ingredient for ‘Visible’ Health and Performance Monitoring?
- 2023
-
Ingår i: Sports Medicine. - Auckland : Adis International Ltd.. - 0112-1642 .- 1179-2035. ; 53, s. 1085-1100
-
Tidskriftsartikel (refereegranskat)abstract
- Background: Athlete monitoring trends appear to be favouring objective over subjective measures. One reason of potentially several is that subjective monitoring affords athletes to give dishonest responses. Indeed, athletes have never been systematically researched to understand why they are honest or not. Objective: Because we do not know what motivates professional athletes to be honest or not when responding to subjective monitoring, our objective is to explore the motives for why the athlete may or may not respond honestly. Methods: A qualitative and phenomenological approach was used, interviewing 11 world-class team-sport athletes (five women, six men) about their experiences when asked to respond to subjective monitoring questionnaires. Interview transcripts were read in full and significant quotations/statements extracted. Meanings were formulated for each interviewees’ story and assigned codes. Codes were reflected upon and labelled as categories, with similar categories grouped into an overall theme. Themes were examined, articulated, re-interpreted, re-formulated, and written as a thematic story, drawing on elements reported from different athletes creating a blended story, allowing readers a feel for what it is like to live the experience. Results: Overall, four key themes emerged: (i) pursuit of the ideal-self, (ii) individual barriers to athlete engagement, (iii) social facilitators to athlete engagement; and (iv) feeling compassion from performance staff. Conclusions: Our main insight is that athletes’ emotions play a major role in whether they respond honestly or not, with these emotions being driven at least in part by the performance staff asking the questions. © 2023, The Author(s).
|
|
| 8. |
- McCall, Alan, et al.
(författare)
-
Injury prevention strategies, coach compliance and player adherence of 33 of the UEFA Elite Club Injury Study teams: a survey of teams head medical officers
- 2016
-
Ingår i: British Journal of Sports Medicine. - : BMJ PUBLISHING GROUP. - 0306-3674 .- 1473-0480. ; 50:12, s. 725-730
-
Tidskriftsartikel (refereegranskat)abstract
- Purpose (1) To quantify current practice at the most elite level of professional club football in Europe with regard to injury prevention strategy; (2) to describe player adherence and coach compliance to the overall injury prevention programme. Methods A structured online survey was administered to the Head medical officers of 34 elite European teams currently participating in the UEFA Elite Club Injury Study. The survey had 4 sections; (1) risk factors for injury, (2) assessment and monitoring of injury risk, (3) prevention strategies and (4) coach compliance and player adherence to the injury prevention process. Results 33 (97%) Medical officers of the teams responded. The most important perceived injury risk factor was previous injury. Four of the top 6 risk factors physical fitness, accumulated fatigue, reduced recovery time between matches and training load-were related to player workload. The top 3 preventative exercises were eccentric, balance/proprioception and core training. Regarding monitoring, the top 3 tools implemented were measurement of workload, subjective wellness and a general medical screen. The subjectively rated level of coach compliance in UEFA teams was perceived as high, while the player adherence varied from none at all to perfect. Summary and conclusion Medical officers place importance on workload-related variables as risk factors for injury in elite European football players. A lack of consistently high player adherence may limit the effects of contemporary injury prevention programmes in elite European footballers.
|
|
| 9. |
- McCall, Alan, et al.
(författare)
-
Internal workload and non-contact injury: a one-season study of five teams from the UEFA Elite Club Injury Study
- 2018
-
Ingår i: British Journal of Sports Medicine. - : BMJ PUBLISHING GROUP. - 0306-3674 .- 1473-0480. ; 52:23, s. 1517-1522
-
Tidskriftsartikel (refereegranskat)abstract
- Background Internal workload (ie, from training and matches) is considered one of the most important injury risk factors for elite European football teams, however there is little published evidence to support this belief. Objective We examined the association and predictive power of internal workload and non-contact injuries. Methods Five elite European teams, 171 players (age: 25.1 +/- 4.9 years; height:181.6 +/- 6.7 cm; body mass: 77.5 +/- 7.2 kg) participated over one full competitive season. Using the session-rating of perceived exertion (s-RPE) method players internal workloads were calculated for acute week, week-to-week changes, cumulated weeks, chronic weeks and acute:chronic ratios and analysed for association with non-contact injury (using generalised estimating equations (GEE)). Associated variables from GEE analysis were categorised into very low to very high workload zones and checked for increased relative risks (RRs). Associated workload variables were also analysed for predictive power (receiver operating characteristics). Results Acute:chronic workload ratios at 1:3 and 1:4 weeks were associated with non-contact injury (Pamp;lt;0.05). Specifically, a greater risk of injury was found for players with an acute:chronic workload at 1:4 weeks of 0.97 to 1.38 (RR 1.68; 95% CI 1.02 to 2.78, likely harmful) and amp;gt;1.38 (RR 2.13; 95% CI 1.21 to 3.77, very likely harmful) compared with players whose acute:chronic workload was 0.60 to 0.97. An acute:chronic workload 1:3 of amp;gt;1.42 compared with 0.59 to 0.97 displayed a 1.94 times higher risk of injury (RR 1.90; 95% CI 1.08 to 3.36, very likely harmful). Importantly, acute:chronic workload at both 1:4 and 1:3 showed poor predictive power (area under the curve 0.53 to 0.58) despite previous reports and beliefs that it can predict injury. Conclusions This study provides evidence for the acute:chronic internal workload (measured using s-RPE) as a risk factor for non-contact injury in elite European footballers. However the acute:chronic workload, in isolation, should not be used to predict non-contact injury.
|
|
| 10. |
- Runcie, Daniel E., et al.
(författare)
-
Genomic characterization of the evolutionary potential of the sea urchin strongylocentrotus droebachiensis facing ocean acidification
- 2016
-
Ingår i: Genome Biology and Evolution. - : Oxford University Press (OUP). - 1759-6653. ; 8:12, s. 3672-3684
-
Tidskriftsartikel (refereegranskat)abstract
- Ocean acidification (OA) is increasing due to anthropogenic CO2 emissions and poses a threat to marine species and communities worldwide. To better project the effects of acidification on organisms' health and persistence, an understanding is needed of the 1) mechanisms underlying developmental and physiological tolerance and 2) potential populations have for rapid evolutionary adaptation. This is especially challenging in nonmodel species where targeted assays of metabolism and stress physiology may not be available or economical for large-scale assessments of genetic constraints.We used mRNA sequencing and a quantitative genetics breeding design to study mechanisms underlying genetic variability and tolerance to decreased seawater pH (-0.4 pH units) in larvae of the sea urchin Strongylocentrotus droebachiensis.We used a gene ontology-based approach to integrate expression profiles into indirectmeasuresof cellular andbiochemical traits underlying variation inlarvalperformance (i.e., growth rates).Molecular responses toOAwere complex, involving changes to several functions such as growth rates, cell division,metabolism, and immune activities. Surprisingly, the magnitude of pH effects on molecular traits tended to be small relative to variation attributable to segregating functional genetic variation in this species. We discuss how the application of transcriptomics and quantitative genetics approaches across diverse species can enrich our understanding of the biological impacts of climate change.
|
|
