Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 4 de 4
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
J Strength Cond Res ; 31(11): 3128-3136, 2017 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-28902120

RESUMO

Turner, AN, Kilduff, LP, Marshall, GJG, Phillips, J, Noto, A, Buttigieg, C, Gondek, M, Hills, FA, and Dimitriou, L. Competition intensity and fatigue in elite fencing. J Strength Cond Res 31(11): 3128-3136, 2017-As yet, no studies have characterized fencing competitions. Therefore, in elite male foilists and across 2 competitions, we investigated their countermovement jump height, testosterone (T), cortisol (C), alpha-amylase (AA), immunoglobulin A (IgA), heart rate (HR), blood lactate (BL), and rating of perceived exertion (RPE). Average (±SD) scores for RPE, BL, and HR (average, max, and percentage of time ≥80% HRmax) were highest in the knockout bouts compared with poules (8.5 ± 1.3 vs. 5.7 ± 1.3, 3.6 ± 1.0 vs. 3.1 ± 1.4 mmol·L, 171 ± 5 vs. 168 ± 8 b·min, 195 ± 7 vs. 192 ± 7 b·min, 74 vs. 68%); however, only significant (p ≤ 0.05) for RPE. Countermovement jump height, albeit nonsignificantly (p > 0.05), increased throughout competition and dropped thereafter. Although responses of C, AA, and IgA showed a tendency to increase during competition and drop thereafter (T and T:C doing the opposite), no significant differences were noted for any analyte. Results suggest that fencing is a high-intensity anaerobic sport, relying on alactic energy sources. However, some bouts evoke BL values of ≥4 mmol·L and thus derive energy from anaerobic glycolysis. High HRs appear possible on account of ample within- and between-bout rest. The small competition load associated with fencing competitions may explain the nonsignificant findings noticed.


Assuntos
Atletas , Esforço Físico/fisiologia , Esportes/fisiologia , Adulto , Teste de Esforço , Glicólise , Frequência Cardíaca/fisiologia , Humanos , Hidrocortisona/biossíntese , Ácido Láctico/biossíntese , Masculino , Descanso , Medicina Esportiva , Testosterona/biossíntese , Adulto Jovem , alfa-Amilases/biossíntese
2.
Int J Sports Physiol Perform ; 12(10): 1319-1323, 2017 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-28290725

RESUMO

To avoid being hit, fencers typically adopt an out-of-range position, which was hypothesized to be governed by body- and action-scaled affordances. This theory was measured in elite and national-level junior (under 20 y of age) fencers. Associations between "reachability" of lunging and step-lunging attacks were assessed against height, arm span, leg span, body mass, and lower-body power and then compared across level. Reachability was determined as the distance covered by fencers during these attacks and was reported as actual and estimated distances. Elite fencers are better at estimating their lunging and step-lunge distance compared to nationally ranked junior fencers (-0.9% vs 7.3% and 5.4% vs 10.9%, respectively). Surprisingly, elite fencers' actual and estimated distances for these was less than the junior fencers' (222.6 vs 251.5 cm and 299.3 vs 360.2 cm, respectively), and significantly so in the former. Finally, only arm span (r = .81) and leg span (r = .71) were significantly correlated to estimated lunging distance, and this was only in elite fencers. Findings suggest that better fencers can accurately predict their attack range and that reachability appears to be positively influenced by arm and leg span; these may feed in to talent identification. Given that distances were less in elite fencers, findings suggest that timing and distance estimation are key skills to master and that the mastery of these in offensive actions can mitigate, to a large extent, the physical benefits of an opponent's greater height.


Assuntos
Antropometria , Desempenho Atlético/fisiologia , Esportes/fisiologia , Adolescente , Humanos , Movimento , Postura , Adulto Jovem
3.
Int J Sports Physiol Perform ; 12(1): 124-128, 2017 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-27140957

RESUMO

Session rating of perceived exertion (sRPE) is known to significantly relate to heart-rate (HR) -based methods of quantifying internal training load (TL) in a variety of sports. However, to date this has not been investigated in fencing and was therefore the aim of this study. TL was calculated by multiplying the sRPE with exercise duration and through HR-based methods calculated using Banister and Edwards TRIMP. Seven male elite foil fencers (mean ± SD age 22.3 ± 1.6 y, height 181.3 ± 6.5 cm, body mass 77.7 ± 7.6 kg) were monitored over the period of 1 competitive season. The sRPE and HR of 67 training sessions and 3 competitions (87 poule bouts and 12 knockout rounds) were recorded and analyzed. Correlation analysis was used to determine any relationships between sRPE- and HR-based methods, accounting for individual variation, mode of training (footwork drills vs sparring sessions), and stage of competition (poules vs knockouts). Across 2 footwork sessions, sRPE and Banister and Edwards TRIMP were found to be reliable, with coefficient of variation values of 6.0%, 5.2%, and 4.5%, respectively. Significant correlations with sRPE for individual fencers (r = .84-.98) and across mode of exercise (r = .73-.85) and competition stages (r = .82-.92) were found with HR-based measures. sRPE is a simple and valuable tool coaches can use to quantify TL in fencing.


Assuntos
Percepção , Condicionamento Físico Humano/métodos , Esforço Físico/fisiologia , Esportes/fisiologia , Esportes/psicologia , Comportamento Competitivo/fisiologia , Frequência Cardíaca/fisiologia , Humanos , Masculino , Reprodutibilidade dos Testes
4.
J Strength Cond Res ; 30(11): 3134-3139, 2016 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26950343

RESUMO

Turner, AN, Marshall, G, Phillips, J, Noto, A, Buttigieg, C, Chavda, S, Downing, W, Atlay, N, Dimitriou, L, and Kilduff, L. Physical characteristics underpinning repetitive lunging in fencing. J Strength Cond Res 30(11): 3134-3139, 2016-Given the repetitive demand to execute lunging and changes in direction within fencing, the ability to sustain these at maximal capacity is fundamental to performance. The aim of this study was threefold. First, to provide normative values for this variable referred to as repeat lunge ability (RLA) and second to identify the physical characteristics that underpin it. Third, was to establish if a cause and effect relationship existed by training the associated characteristics. Assessment of lower-body power, reactive strength, speed, change of direction speed (CODS), and a sport-specific RLA were conducted on senior and junior elite male fencers (n = 36). Fencers were on average (±SD) 18.9 ± 3.2 years of age, 174.35 ± 10.42 cm tall, 70.67 ± 7.35 kg in mass, and 8.5 ± 4.2 years fencing experience. The RLA test had average work times of 16.03 ± 1.40 seconds and demonstrated "large" to "very large" associations with all tested variables, but in particular CODS (r = 0.70) and standing broad jump (SBJ; r = -0.68). Through linear regression analysis, these also provided a 2-predictor model accounting for 61% of the common variance associated with RLA. A cause and effect relationship with SBJ and CODS was confirmed by the training group, where RLA performance in these fencers improved from 15.80 ± 1.07 to 14.90 ± 0.86 seconds, with the magnitude of change reported as "moderate" (effect size (ES) = 0.93). Concurrent improvements were also noted in both SBJ (216.86 ± 17.15 vs. 221.71 ± 17.59 cm) and CODS (4.44 ± 0.29 vs. 4.31 ± 0.09 seconds) and while differences were only significant in SBJ, magnitudes of change were classed as "small" (ES = 0.28) and "moderate" (ES = 0.61), respectively. In conclusion, to improve RLA strength and conditioning coaches should focus on improving lower-body power and reactive strength, noting that jump training and plyometrics designed to enhance horizontal propulsion may be most effective, and translate to improvement in CODS also.


Assuntos
Desempenho Atlético/fisiologia , Extremidade Inferior/fisiologia , Força Muscular/fisiologia , Resistência Física/fisiologia , Adolescente , Humanos , Masculino , Condicionamento Físico Humano
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...