Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 184
Filtrar
1.
Br J Sports Med ; 58(15): 870-881, 2024 Jul 25.
Artigo em Inglês | MEDLINE | ID: mdl-38955507

RESUMO

The upcoming Paris 2024 Olympic and Paralympic Games could face environmental challenges related to heat, air quality and water quality. These challenges will pose potential threats to athletes and impact thousands of stakeholders and millions of spectators. Recognising the multifaceted nature of these challenges, a range of strategies will be essential for mitigating adverse effects on participants, stakeholders and spectators alike. From personalised interventions for athletes and attendees to comprehensive measures implemented by organisers, a holistic approach is crucial to address these challenges and the possible interplay of heat, air and water quality factors during the event. This evidence-based review highlights various environmental challenges anticipated at Paris 2024, offering strategies applicable to athletes, stakeholders and spectators. Additionally, it provides recommendations for Local Organising Committees and the International Olympic Committee that may be applicable to future Games. In summary, the review offers solutions for consideration by the stakeholders responsible for and affected by the anticipated environmental challenges at Paris 2024.


Assuntos
Atletas , Esportes , Humanos , Aniversários e Eventos Especiais , Temperatura Alta/efeitos adversos , Poluição do Ar/prevenção & controle , Poluição do Ar/efeitos adversos , Participação dos Interessados , Paris , Esportes para Pessoas com Deficiência
2.
BMJ Open Sport Exerc Med ; 10(2): e001811, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38736644

RESUMO

While there is a lack of research into abuse in elite dance, numerous allegations of emotional, sexual and physical abuse of dancers can be found anecdotally in the media, legal convictions and personal accounts. As more dancers speak out, the scale of the problem within preprofessional schools and professional companies is becoming apparent. Accordingly, effective safeguarding mechanisms for preventing, identifying and reporting abuse are urgently needed. This viewpoint is intended to raise health professionals' awareness of factors contributing to abusive practices found in dance environments and the potential clinical implications of abuse to dancers' health and well-being. We also call for research and policy engagement on safeguarding and abuse prevention designed and implemented in partnership with stakeholders, aiming to promote safe and positive dance environments for all.

3.
Sci Med Footb ; : 1-9, 2024 Mar 07.
Artigo em Inglês | MEDLINE | ID: mdl-38451112

RESUMO

Visual exploratory activities (VEA) refer to head and body movements that football players make prior to receiving the ball to search possibilities for action. VEA is considered a key performance indicator that differentiates the skill level of players. This study revisited whether VEA also distinguishes super elite, award winning players from their elite teammates without awards. To this end, video footage from the men's UEFA Champions League season 2018-2019 featuring the super elite players (n = 18) and the elite players (n = 18) was analyzed. To reduce the potential differences in match dynamics as much as possible, the selected players in the two groups were of the same team, playing the same match, in the same positioning line. VEA (i.e. frequency per unit time) during the penultimate and final pass prior to ball reception and performance (i.e. percentages of adequate ball contacts and subsequent actions) were compared between the two groups of players using ANOVA and Mann-Whitney tests, respectively. In addition, hierarchical stepwise regression analyses were conducted to explore the degree to which VEA was predicted by group and subsequent performance. The results showed that the players had higher VEA during the final pass (M = 0.45) than the penultimate pass (M = 0.41). There were no significant differences in VEA or performance between the two groups. Also, the regression analyses did not deliver significant models. We conclude that with partial control for match dynamics, no evidence emerged to support that VEA distinguishes super elite players from elite football players.

4.
BMJ Open Sport Exerc Med ; 10(1): e001653, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38410410

RESUMO

Following the tragic events surrounding the war in Ukraine, which started on 24 February 2022, Russian troops have been destroying many Olympic sports infrastructures and athletes and Olympic sports professionals are suffering serious consequences, and sports talents are being lost. Therefore, this Delphi study aimed to identify the most important needs of Ukraine's Olympic sports in hostile conditions. It sought to formulate priority areas crucial for support during and after the war period, aimed at safeguarding the career prospects of Ukrainian athletes. The study further aimed to identify well-informed priorities for developing Ukraine's Olympic sports. These priorities, once discerned, can be advocated for promotion and prioritisation in present and future agendas, thereby shaping the course of international support and ensuring the preservation of Ukrainian athletes' career prospects. A three-round Delphi study was conducted with 42 participants who had expertise as coaches, athletes and researchers (PhD, professor) in sports science. There was a strong panellist agreement on the needs of Ukraine's Olympic sports in the identified hostile conditions. The list of the final top 10 needs included: (1) 'Develop and maintain the athlete's fitness level'; (2) 'Implementation of a better recovery system for athletes'; and (3) 'To ensure a safe training place for athletes'. The needs identified in this study are of tremendous value and guide efforts to Ukraine's sports talents during wartime and, as a result, will guide the international institutions to direct appropriate aid and international support.

5.
BMJ Open Sport Exerc Med ; 9(4): e001610, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-38046277

RESUMO

Background: The Tokyo Olympic games were the only games postponed for a year in peacetime, which will be remembered as the COVID-19 Olympics. No data are currently available on the effect on athlete's performance. Aim: To examine the Italian Olympic athletes who have undergone the return to play (RTP) protocol after COVID-19 and their Olympic results. Methods: 642 Potential Olympics (PO) athletes competing in 19 summer sport disciplines were evaluated through a preparticipation screening protocol and, when necessary, with the RTP protocol. The protocol comprised blood tests, 12-lead resting ECG, transthoracic echocardiogram, cardiopulmonary exercise test, 24-hour Holter-ECG monitoring and cardiovascular MR based on clinical indication. Results: Of the 642 PO athletes evaluated, 384 participated at the Olympic Games, 254 being excluded for athletic reasons. 120 athletes of the total cohort of 642 PO were affected by COVID-19. They were evaluated with the RTP protocol before resuming physical activity after a mean detraining period of 30±13 days. Of them, 100 were selected for Olympic Games participation, 16 were excluded for athletic reasons and 4 were due to RTP results (2 for COVID-19-related myocarditis, 1 for pericarditis and 1 for complex ventricular arrhythmias). Among athletes with a history of COVID-19 allowed to resume physical activity after the RTP and selected for the Olympic Games, no one had abnormalities in cardiopulmonary exercise test parameters, and 28 became medal winners with 6 gold, 6 silver and 19 bronze medals. Conclusions: Among athletes with COVID-19, there is a low prevalence of cardiac sequelae. For those athletes allowed to resume physical activity after the RTP evaluation, the infection and the forced period of inactivity didn't have a negative impact on athletic performance.

6.
J Sci Med Sport ; 26(11): 636-638, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37863666

RESUMO

Precise timing, the ability to control exactly when something should be done, integrates physical characteristics like strength, power, and technique into highly skilled sporting actions. Despite timing's indispensability to peak athletic performance, there exist few timing-specific training methods. The authors present a new training approach which adapts exercises from drummers, the elite timing experts, to athletes. This progressive series of rhythmic exercises cultivates a detailed, 'top down' cognitive framework of time which promises to enhance movement precision and efficiency. Use cases demonstrate broad applications of this new training approach across individual and team sports.


Assuntos
Atletas , Desempenho Atlético , Humanos , Exercício Físico
7.
Physiol Behav ; 271: 114344, 2023 11 01.
Artigo em Inglês | MEDLINE | ID: mdl-37689381

RESUMO

Evidence suggests that higher testosterone levels may provide an athletic advantage. Therefore, it is of practical interest to examine the association between testosterone levels and power- and strength-related traits in young professional track and field athletes, and to consider the factors that determine testosterone levels. The study involved 68 young professional athletes (45 females, 17.3 ± 2.6 years; 23 males, 18.2 ± 1.9 years). Testosterone levels were assessed via liquid chromatography-mass spectrometry. All subjects performed two 20 m and two 30 m sprint trials, and countermovement jump without arm-swing. A bioimpedance analysis of body composition was carried out and biological maturity was examined using the Khamis-Roche method. The average testosterone levels were 26.4 ± 9.6 nmol/l and 1.5 ± 0.7 nmol/l in males and females, respectively. In female athletes, testosterone levels did not correlate with any of traits. Males with the highest testosterone levels were significantly faster in the 20 m (p = 0.033) and 30 m (p = 0.014) sprint trials compared to males with lower testosterone levels. Testosterone levels in males were positively associated with fat mass (p = 0.027), and degree of biological maturation (p = 0.003). In conclusion, we found a positive relationship between testosterone levels and sprint performance in young male athletes.


Assuntos
Desempenho Atlético , Corrida , Atletismo , Humanos , Masculino , Feminino , Atletas , Testosterona
8.
Front Psychol ; 14: 1199448, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37583601

RESUMO

Objective: To investigate kinematic and muscle activity differences during the sleep-push movement in elite field hockey players. We hypothesized that players with specialized sleep-push movement training (specialists) would possess a lower center of mass (CoM) and enhanced reproducibility of muscle activations during the movement, compared to players without explicit movement training (non-specialists). Methods: Ten field hockey players of the Belgian national field hockey team performed the sleep-push movement (5 specialists and 5 non-specialists). Muscle activity and kinematic data were recorded using EMG to evaluate the reproducibility of muscle activations by cross-correlation analysis and power spectral features across the movement, while a motion capture system was used to assess kinematics. Results: Compared to non-specialists, specialists had significantly (p < 0.05) increased stick velocity (9.17 ± 1.28 m/s versus 6.98 ± 0.97 m/s) and lower CoM height (141 ± 52 mm versus 296 ± 64 mm), during the second part of the shot. Specialists also showed a significant (p < 0.05) lower power spectrum in the activity of the upper limb muscles before the shot. Superimposition of the auto crosscorrelation results demonstrated a high degree of reproducibility in specialists' muscle activations. Conclusion: Sleep-push movements realized by elite players who are specialists in the sleep-push movement presented significant kinematics and muscular activation differences when compared to the sleep-push movements realized by elite players who were not specialists in such movement. Characterization of the specific movement and the related high-level performer's muscular strategies offers the possibility of translating sport science findings into functional training with concrete applications for coaches, players, and other key stakeholders for the continued development of the field.

9.
BMJ Open Sport Exerc Med ; 9(2): e001575, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37342788

RESUMO

The objective of this systematic scoping review is to understand the extent and scope of evidence regarding neurodiversity in elite sport. This systematic scoping review considered epidemiological studies, com mentary and viewpoints papers, systematic review and meta-analyses, and any intervention or clinical treatment, management and practice studies in relation to neurodiversity in elite sport. Case studies and grey literature were ineligible for review. Neurodivergence included neurodevelopmental disorders such as autism spectrum disorder, attention-deficit hyperactivity disorder (ADHD) and specific learning disorders. Elite sport was defined as Olympic, Paralympic, national, international, professional and semiprofessional sport. The final 23 studies included in this review comprised 10 observational studies, 4 systematic/narrative reviews, 6 commentary/position statements and 3 qualitative studies. The literature reflected a major focus on ADHD as a risk factor for concussion and prognosis for postconcussion recovery. Further, there was a focus on the medical management of ADHD, regarding adherence to sporting antidoping regulations. One study focused on the experience of autism in athletes in elite sport settings through qualitative interviews. One study focused on anxiety disorders in elite athletes, with ADHD emerging as a major risk factor. There is a strong rationale for future research to build on the evidence for neurodiversity in elite sport to foster supportive and inclusive elite sporting environments.

10.
BMJ Open Sport Exerc Med ; 9(2): e001523, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37159583

RESUMO

Objectives: The primary objective was to study the reach, effectiveness, adoption, implementation and maintenance of the Nordic Hamstring Exercise (NHE) programme in women's elite teams in Europe in the 2020-21 season. The secondary objective was to compare hamstring injury rates between teams that used the NHE programme regularly in team training and teams that did not. Methods: Eleven teams participating in the Women's Elite Club Injury Study during the 2020-21 season provided data about injury rates and the implementation of the NHE programme. Results: One team (9%) used the full original NHE programme, and four teams used the programme in the team training during parts of the season (team training group, n=5). Five teams did not use the NHE, or used it only sporadically for individual players, and one team used NHE only for players with a previous or current hamstring injury (no team training group, n=6). The team training group had a lower incidence of hamstring injuries during match-play (1.4 vs 4.0, p=0.028) than the non-team training group while no difference between groups was shown for the hamstring injury incidence in training (0.6 vs 0.7, p=0.502). Conclusion: A low adoption of the NHE programme was reported during the 2020-21 season. However, teams that used NHE for the whole team or most players had a lower hamstring injury incidence at match-play than teams that did not use the NHE or used it for individual players only.

11.
BMJ Open Sport Exerc Med ; 9(1): e001505, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36756286

RESUMO

Introduction: The cardiovascular benefits of physical exercise are well-known. However, vigorous exercise has also been associated with adverse cardiac effects. To improve our understanding of cardiovascular adaptation to exercise versus maladaptation and pathology, the limits of adaptation should be firmly established using state-of-the-art diagnostic modalities. We therefore initiated the Evaluation of Lifetime participation in Intensive Top-level sports and Exercise (ELITE) cohort to investigate the longitudinal (beneficial and pathological) cardiovascular effects of intensive elite sports and exercise. Methods and analysis: ELITE is a prospective, multicentre, longitudinal cohort study. Elite athletes, from the age of sixteen, are recruited in The Netherlands. The primary objective is to determine the association between elite sports and exercise-induced cardiac remodelling, cardiac pathology, and health benefits over time. Secondary objectives include determining and identifying genetic profiles of elite athletes, and how these are associated with cardiac indices. ELITE will collect data from consultations, electrocardiography, echocardiography and cardiac magnetic resonance imaging, and training- and injury data. ELITE will also collect blood for biobanking and cardiogenetics. Follow-up will take place at intervals of two to five years, and after the elite athletes' professional careers have ended. In addition, a subcohort of ELITE has been established to investigate cardiac sequelae following infections associated with myocardial involvement, including SARS-CoV-2. ELITE is a prospective observational study; therefore, analyses will be primarily explorative. Ethics and dissemination: This study has been approved by the Medical Ethics Review Board of the Amsterdam University Medical Centers (NL71682.018.19). The results of the study will be disseminated by publication in peer-reviewed journals (Netherlands Trial Register number: NL9328).

12.
BMJ Open Sport Exerc Med ; 9(1): e001479, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36643408

RESUMO

Objectives: Little is known about the impact of elite sport participation on long-term athlete health. We aimed to: (1) describe musculoskeletal, mental health, reproductive/endocrine and cardiovascular characteristics in retired elite female athletes and compare to the general population and (2) explore athletes' perceptions of their elite sport participation and its impact on health. Methods: A 136-item online questionnaire was disseminated to Canadian elite female rowing and rugby athletes >18 years old, >2 years retired from elite competition. Matched general population data were obtained from Statistics Canada when available. Results: Seventy-four (24% response rate) athletes (average age 45 (±9) years; retired 15 (±9) years) completed the questionnaire (30 rowing, 44 rugby athletes). During their career, 63 athletes (85%) experienced a hip/groin, knee, foot/ankle injury, or low back pain, with 42 (67%) reporting ongoing symptoms. Athletes 35-54 years reported worse knee symptoms and quality of life compared with the general population (symptom: p=0.197; d=1.15 [0.66, 1.63]; quality of life: p=0.312 d=1.03 [0.54, 1.51]) while other hip, knee and foot/ankle outcome scores were similar. Retired athletes had lower odds of anxiety (OR=0.155 [95% CI0.062 to 0.384]), greater lifetime/ever odds of amenorrhea (OR=6.10 [95%CI 2.67 to 13.96]) and gave birth when older (p<0.05). Fifty-nine (79%) recalled witnessing or experiencing at least one form of harassment/abuse during their career. Sixty athletes (81%) rated their current health as above average or excellent and 61 (82%) would compete at the same level again if given the choice. Conclusion: These novel insights can inform future preventative efforts to promote positive elite sport-related outcomes for current, former and future female athletes.

13.
Scand J Med Sci Sports ; 33(5): 631-640, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-36533527

RESUMO

BACKGROUND: QE is defined as the final fixation on a specific location or object in the visuomotor workspace, for a minimum of 100 ms, that enables the athletes to gather relevant information before a critical movement. Several lines of research indicate that QE contributes to sports performance. However, its contribution to performance is derived mainly from research investigating isolated motor tasks. Therefore, little is known about its contribution in realistic competitional settings. METHODS: The present study determined whether QE contributes to table tennis performance obtained from matches played in a simulated competition. Athletes (N = 10) performed two matches, one against a difficult and one against an accessible opponent. Gaze behavior was captured using Tobii Glasses 2. RESULTS: We found that athletes made longer QE before winner balls (i.e., balls that scored a point), compared to forced and unforced errors (pbonferroni  = 0.005, t = -4.45; pbonferroni <0.001, t = -6.45). Confirming that QE contributes to performance in a real match even in a competitional setting. We found no significant effect for the difficulty of the match, nor an interaction between the difficulty of the match and the type of shots Fs (1, 9) < 2.26, ps >0.16 0.70, η2 ps < 0.20. CONCLUSIONS: The present study provides evidence for QE's contribution to sports performance investigated in a "gold standard" ecological environment. More specifically, it provides evidence that QE gradually increases with the quality of the shot. Identical patterns were found regardless of the difficulty of the match.


Assuntos
Desempenho Atlético , Tênis , Humanos , Atletas , Movimento
14.
BMJ Open Sport Exerc Med ; 8(4): e001395, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36451657

RESUMO

Objectives: To analyse the available evidence and identify gaps in current knowledge regarding physical activity volume and intensity and their effects on pregnancy outcomes in female athletes. Design: Scoping review. Data sources: A structured literature search of three electronic databases (Embase, PubMed and Web of Science) was conducted on 25 February 2022, and a rerun search was conducted on 8 September 2022. Eligibility criteria: Studies were eligible if they contained information on the relevant population (ie, elite or competitive amateur female athletes), intervention/exposure (ie, minimum of 10 hours of sport per week) and fetal and maternal outcomes. Eligible comparators included female recreational athletes and pregnant non-exercisers. Risk of bias: The risk of bias was evaluated with the National Institutes of Health (National Heart, Lung and Blood Institute) quality assessment tool. Results: The results revealed a discrepancy between the number of original research papers and the number of reviews and recommendations derived from them. The identified studies focused primarily on pregnant recreational athletes. Sixteen clinical studies met the inclusion criteria. No adverse effects on maternal or fetal outcomes were reported. Only during performance tests involving acute intensive exercise with the mother exercising at more than 90% of her maximal heart rate did some fetuses experience decelerations in heart rate. Summary/conclusion: A lack of high-quality studies and direct evidence on pregnant elite and competitive amateur female athletes is evident. Further prospective observational cohort studies are needed using new monitoring methods (eg, non-invasive, wireless monitoring systems) aiming to gain a broader understanding of the stress tolerance of pregnant athletes and fetuses during exercise. Following that, interventional studies with stress tests in laboratory settings should be conducted. Therefore, technology plays a decisive role in gaining new knowledge and providing evidence-based recommendations on this topic. PROSPERO registration number: CRD42022309541.

15.
Front Sports Act Living ; 4: 988631, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36051964

RESUMO

Building on a large volume of recent research in talent identification and development, this paper future directions for research and practice. We suggest that strategic coherence become a greater point of emphasis in both, with the Performance, Outcome and Process framework holding the potential to signal various markers of effectiveness. Secondly, greater recognition of the need to deploy limited resources where they promote movement toward these markers of effectiveness. Finally, we make recommendations for the operationalising of strategy in talent and performance systems by considering the integration of top down and bottom-up strategic processes.

16.
BMJ Open Sport Exerc Med ; 8(2): e001330, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35789552

RESUMO

Objectives: (1) To assess the period prevalence of SARS-CoV-2 infections and willingness to vaccinate in Swiss elite athletes and (2) to evaluate whether sociodemographic and sport-related characteristics were associated with infection of SARS-CoV-2 in athletes. Methods: A total of 1037 elite athletes (Mage=27.09) were surveyed in this cross-sectional study. They were asked whether they had been infected with SARS-CoV-2 and whether they would like to be vaccinated. Characteristics of a possible COVID-19 illness were also recorded. Results: During the first year of the pandemic, 14.6% of all Swiss elite athletes were found to be infected with SARS-CoV-2, and 5.4% suspected that they had been infected. Male athletes, young athletes and team sports athletes had an increased likelihood of being infected with SARS-CoV-2. There was considerable heterogeneity in the duration and severity of a COVID-19 illness in athletes. Overall, 68% of respondents indicated a willingness to be vaccinated if they were offered an opportunity to do so. Conclusion: In the first year of the pandemic, Swiss elite athletes were tested more often positive for SARS-CoV-2 than the general Swiss population. Because COVID-19 illness can impair health for a relatively long time, sports federations are advised to motivate athletes to be vaccinated.

17.
Sports (Basel) ; 10(6)2022 May 25.
Artigo em Inglês | MEDLINE | ID: mdl-35736823

RESUMO

(1) Background: The interpersonal dimensions of coaching in high performance sport have been subject to increasing scrutiny but with limited evidence to guide practice. Similarly, there is increasing practical interest in the concept of psychological safety, often portrayed as an implicitly desirable characteristic of all sporting environments but, as yet, still to receive research attention in high performance. As a first step to addressing these deficiencies, the present study addressed two research aims: (a) to examine the extent to which matched groups of international and released professional rugby union players perceived psychological safety to be an adaptive feature of their developmental experience and (b) to understand what elements of the player's coaching experience were perceived to be enabling or disenabling of future progress. (2) Methods: Seven rugby union players who had 'made it' and eight players who had been released from their professional contracts took part in a semi-structured interview exploring their developmental experiences. Data were subsequently analysed using Reflexive Thematic Analysis. (3) Results: Both groups of players found each of their talent development and high performance environments to be psychologically unsafe. Furthermore, players perceived coaches who were the most impactful in their development as offering 'tough love'. This included a range of 'harder' and 'softer' interpersonal approaches that presented the player with clear direction, role clarity and a sense of care. It appeared that this interpersonal approach helped the player to navigate, and benefit from, the psychologically unsafe high performance milieu. (4) Conclusions: There appear to be a number of balances for the coach in the high performance setting to navigate and a need for more nuance in applying constructs such as psychological safety.

18.
BMJ Open Sport Exerc Med ; 8(2): e001324, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35601139

RESUMO

Objectives: The purpose of this prospective study was to report incidence and transmission of SARS-CoV-2, among professional golfers and essential support staff undergoing risk assessment and enhanced risk reduction measures when considered a close contact as opposed to standard isolation while competing on the DP World Tour during the 2021 season. Methods: This prospective cohort study included all players and essential support staff participating in 26 DP World Tour events from 18 April 2021 to 21 November 2021. High-risk contacts were isolated for 10 days. Moderate-risk contacts received education regarding enhanced medical surveillance, had daily rapid antigen testing for 5 days, with reverse transcriptase-polymerase chain reaction (RT-PCR) tesing on day 5, mandated mask use and access to outside space for work purposes only. Low-risk contacts typically received rapid antigen testing every 48 hours and RT-PCR testing on day 5. Results: The total study cohort compromised 13 394 person-weeks of exposure. There were a total of 30 positive cases over the study period. Eleven contacts were stratified as 'high risk'. Two of these subsequently tested positive for SARS-CoV-2. There were 79 moderate-risk contact and 73 low-risk contacts. One moderate-risk contact subsequently tested positive for SARS-CoV-2 but did not transmit the virus. All other contacts, remained negative and asymptomatic to the end of the tournament week. Conclusions: A risk assessment and risk reduction-based approach to contact tracing was safe in this professional golf event setting when Alpha and Delta were the predominant variants. It enabled professional golfers and essential support staff to work.

19.
Front Physiol ; 13: 827932, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35431985

RESUMO

In elite oarsmen, the rowing ergometer is a valuable tool for both training and studying rowing performance determinants. However, the energy cost of rowing, often reported as a determinant of performance, has never been described for ergometer rowing. Therefore, this study aimed to characterize the energy cost of ergometer rowing (ECR) in elite oarsmen, its contribution to 2,000 m performance, and its determinants. This study was conducted on 21 elite oarsmen from the French national team. It included an incremental exercise test up to exhaustion and an all-out performance test over 2,000 m, both conducted on a rowing ergometer. Gas exchange analysis was performed to calculate oxygen uptake and substrate utilization rate. Whole blood lactate concentrations during the incremental test were obtained from the earlobe. During the incremental test, ECR displayed a significant linear increase up to a plateau that reached a mean rowing speed of 5.23 ± 0.02 m⋅s-1. The ECR values at 300, 350, and 400 W were positively correlated with performance expressed as the time required to perform the 2,000 m distance on the rowing ergometer. The same ECR values were found to be significantly related to fat oxidation (expressed in percentage of total energy supply) and blood lactate concentrations. This study provides the first description of ECR and of its relationship to exercise intensity on the rowing ergometer in elite oarsmen. ECR appeared to be a factor of performance and interestingly was related to energy supply from fat and blood lactate concentrations.

20.
BMJ Open Sport Exerc Med ; 8(1): e001309, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35368514

RESUMO

Background: Exercise-induced cardiac remodelling (EICR) results from the structural, functional and electrical adaptations to exercise. Despite similar sports participation, EICR varies and some athletes develop phenotypic features that overlap with cardiomyopathies. Training load and genotype may explain some of the variation; however, exercise 'dose' has lacked rigorous quantification. Few have investigated the association between EICR and genotype. Objectives: (1) To identify the impact of training load and genotype on the variance of EICR in elite endurance athletes and (2) determine how EICR and its determinants are associated with physical performance, health benefits and cardiac pathology. Methods: The Pro@Heart study is a multicentre prospective cohort trial. Three hundred elite endurance athletes aged 14-23 years will have comprehensive cardiovascular phenotyping using echocardiography, cardiac MRI, 12-lead ECG, exercise-ECG and 24-hour-Holter monitoring. Genotype will be determined using a custom cardiomyopathy gene panel and high-density single-nucleotide polymorphism arrays. Follow-up will include online tracking of training load. Cardiac phenotyping will be repeated at 2, 5, 10 and 20 years. Results: The primary endpoint of the Pro@Heart study is the association of EICR with both training load and genotype. The latter will include rare variants in cardiomyopathy-associated genes and polygenic risk scores for cardiovascular traits. Secondary endpoints are the incidence of atrial and ventricular arrhythmias, physical performance and health benefits and their association with training load and genotype. Conclusion: The Pro@Heart study is the first long-term cohort study to assess the impact of training load and genotype on EICR. Trial registration number: NCT05164328; ACTRN12618000716268.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA