scholarly journals Effects of 8-weeks of stable vs unstable surface destabilizing training on shot outcome in elite golfers (Efectos de 8 semanas de entrenamiento desestabilizador en superficies estables vs inestables sobre el resultado de los golpes en golfistas de élite)

Retos ◽  
2022 ◽  
Vol 44 ◽  
pp. 756-762
Author(s):  
Manuel García Sillero ◽  
Constantino Peruzzi ◽  
Iván Chulvi-Medrano ◽  
Javier Peña ◽  
Manuel De Diego ◽  
...  

  Purpose: This research aimed to compare the effect of two intervention programs using stable or unstable surfaces on speed and hitting distance in golf stroke/swing. Methods: Twenty-five elite golfers (19.20 ± 1.77 years, height = 181.12 ± 4 cm, body mass = 75.35 ± 5.83; kg, BMI = 22.71 ± 1.76 kg.m2, handicap: 2.49 ± 2.56) were randomly assigned to two different 8-week training programs based on unstable surface (n = 12) or stable surface training (n=13). Measurements of carry distance and club head speed were performed using the Trackman Golf® system, with each participant executing five swings and obtaining the average and best distance. Results: No significant changes (p< 0.05) in the club head speed or carry distance were found after the intervention in the stable surface or the unstable surface training group. Conclusions: The proposed intervention using instability surfaces does not provide any additional benefit to training on stable surfaces in the specific performance of the stroke in elite golfers. Resumen. Objetivo: Esta investigación tuvo como objetivo comparar el efecto de dos programas de intervención que utilizan superficies estables o inestables sobre la velocidad y la distancia de golpeo en el golpeo/swing de golf. Métodos: Veinticinco golfistas de élite (19,20 ± 1,77 años, altura = 181,12 ± 4 cm, peso corporal = 75,35 ± 5,83; kg, IMC = 22,71 ± 1,76 kg.m2, hándicap: 2,49 ± 2,56) fueron asignados aleatoriamente a dos programas de entrenamiento diferentes de 8 semanas de duración basados en superficies inestables (n = 12) o en superficies estables (n = 13). Las mediciones de la distancia de golpeo y la velocidad de la cabeza del palo se realizaron con el sistema Trackman Golf®, ejecutando cada participante cinco swings y obteniendo la media y la mejor distancia. Resultados: No se encontraron cambios significativos (p< 0,05) en la velocidad de la cabeza del palo ni en la distancia de golpeo después de la intervención en el grupo de entrenamiento en superficie estable o en el de superficie inestable. Conclusiones: La intervención propuesta utilizando superficies de inestabilidad no aporta ningún beneficio adicional al entrenamiento en superficies estables en el rendimiento específico del golpe en golfistas de élite.

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Martín–Guillaumes J ◽  
◽  
Montull L ◽  
Ventura JL ◽  
Javierre C ◽  
...  

Purpose: To compare inter–individual response variability and detraining effects on markers attributed to aerobic and anaerobic performance after shortterm standardized aerobic, strength and mixed training programs. Methods: Thirty–six male students were randomly assigned to either an aerobic, strength, mixed, or control program (9 per group). They performed two consecutive cycling tests (incremental and plateau) to exhaustion at three points: 1 week before training, after 6 weeks of training, and 3 weeks after the training was finished. Maximal oxygen consumption (VO2max), maximal workload (Wmax), and time to exhaustion performed at Wmax (W × time) were compared between groups by repeated–measures ANOVA with Bonferroni post–hoc tests. The inter–subject response variability within each training group was evaluated by comparison with the 95% confidence interval of the control group. Detraining effects were evaluated using the hysteresis areas, which were compared between each training group and the control group by Mann–Whitney U test. Results: Differences were observed in Wmax for the aerobic (F(2,7)=19.562; p=0.001; n²=0.85) and mixed (F(2,7)=13.447; p=0.004; n²=0.99) programs, and in W × time for the mixed program (F(2,7)=15.432; p= 0.016; n²=0.89). There was high inter–subject response variability for all variables and training programs, except for a homogenous positive response to Wmax in the mixed program (X²=6.27; p=0.04). Detraining effects of Wmax were also better maintained after the mixed program. Conclusion: A mixed program of aerobic and strength training demonstrated higher improvements in the studied markers of performance, with lower interindividual response variability, and longer detraining effects compared with aerobic or strength programs.


Sports ◽  
2020 ◽  
Vol 8 (8) ◽  
pp. 104
Author(s):  
Konstantina Karagianni ◽  
Olyvia Donti ◽  
Christos Katsikas ◽  
Gregory C. Bogdanis

This study examined the effects of a short-duration supplementary strength–power training program on neuromuscular performance and sport-specific skills in adolescent athletes. Twenty-three female “Gymnastics for All” athletes, aged 13 ± 2 years, were divided into a training group (TG, n = 12) and a control group (CG, n = 11). Both groups underwent a test battery before and after 10 weeks of intervention. TG completed, in addition to gymnastics training, a supplementary 7–9 min program that included two rounds of strength and power exercises for arms, torso, and legs, executed in a circuit fashion with 1 min rest between rounds, three times per week. Initially, six exercises were performed (15 s work–15 s rest), while the number of exercises was decreased to four and the duration of each exercise was increased to 30 s (30 s rest) after the fifth week. TG improved countermovement jump performance with one leg (11.5% ± 10.4%, p = 0.002) and two legs (8.2% ± 8.8%, p = 0.004), drop jump performance (14.4% ± 12.6%, p = 0.038), single-leg jumping agility (13.6% ± 5.2%, p = 0.001), and sport-specific performance (8.8% ± 7.4%, p = 0.004), but not 10 m sprint performance (2.4% ± 6.6%, p = 0.709). No change was observed in the CG (p = 0.41 to 0.97). The results of this study indicated that this supplementary strength–power program performed for 7–9 min improves neuromuscular and sport-specific performance after 10 weeks of training.


2019 ◽  
Vol 7 (3) ◽  
pp. 215 ◽  
Author(s):  
Levent Tanyeri ◽  
Sercan Öncen

Purpose: Snowboarding is a branch of sport, an individual Alpine sport, which requires superior physical structure. In snowboarding, snowboarders are expected to have high level aerobic and anaerobic strength to become successful. In the present study, the effects of training programs on different surfaces on slalom downhill speed of snowboarding-Alpine snowboarders were examined.Methods: 18 male snowboarders in the Turkish National Snowboarding Alpine team participated in the study. Snowboarders were divided into two groups. Experimental group (G1) was divided into train on non-stable surface and stable surface groups. The experimental group got a coordination and classical snowboarding training program on different surfaces over 8 weeks for 2 days per week (Tuesday-Thursday). Stable surfaces were used on Tuesday and consisted of surfaces with Bosu ball, balance rope, plates ball, balance cushion, balance board, and balance disk. Non-stable surfaces were used on Wednesday and consisted foo skiing exercises that will disturb the balance of the sport player including straight slalom track, degrade surface track, skiing on hard surface, skiing on soft surface, skiing on one foot with eyes open, skiing with eyes closed. The control group (CG) received a classical training program. Trainings were scheduled to leave at least 36 hours between two application days. To determine the speed capacities of the snowboarders the slalom downhill speed test was used; to test agility, the hexagonal test was used, and to measure balance techno body prokin static and dynamic balance tests were used. In the data analysis, descriptive statistics were used. For comparative analysis, the Mann-Whitney U test was used and the significance level was selected as 0.05.Findings: The research results revealed that coordination trainings conducted on different surfaces for 8 weeks had a significant effect on slalom downhill speed of snowboarding-Alpine snowboarders.


2020 ◽  
Vol 29 (1) ◽  
pp. 391
Author(s):  
José Manuel Cansino Muñoz-Repiso ◽  
Antonio Sánchez Braza

This paper estimes the average effect of a binary treatment on the time needed to find a job. Such a treatment is the training public schools program implemented in Seville. The research compares one training group and a control group. Two methods are developed with an interesting database. The first uses an estimator which weights observations by the inverse of the propensity score. This estimator let us conclude that, for participants, the time needed to find a job is reduced in 471 days. The second one is the differences estimator, it let us conclude that the time needed to find a job is reduced in 448 days. The evaluated program works as an active labour market policy with favourable effects on unemployed young people. Compared with other research in Spain, the obtained results show evidence in the same way as most of evaluation but stronger. A similar conclusion is derived from a comparison with international evidence disposable.


2020 ◽  
Vol 6 (1) ◽  
pp. 383
Author(s):  
Cem Akyuz ◽  
Asiye Filiz Camliguney

The objective of this study is to assess the impact of deceleration training method on improving dynamic balance skills of young soccer players in comparison with the conventional training methods. This study included 26 young soccer players (mean age: 13.54±1.48, height: 154.98±12.44, weight: 46.16±11.06, Body Mass Index 18.96±2.21 kg/m2, fat percentile 18.22%±3.22). Thirteen players participated in the deceleration training group (DTG) group and thirteen players participated in the conventional training group (CTG). The training programs were executed on three nonconsecutive days in a week for a total of eight weeks. Y-balance tests were conducted both before and after the eight week training programs. The differences between the averages were analyzed with Wilcoxon, comparison between the groups were analyzed with Mann-Whitney-U post hoc analyses. There was no difference in left-right balance variation (p > 0.05) performance measurements between DTG and CTG before the exercise program. However, after the 8 week training programs, the performance measurements between DTG and CTG were significantly different (p < 0.05) and the dynamic balance skill development of the DTG were more advanced. Based on these results, the deceleration training method seems to be a more effective method in developing dynamic balance skills than conventional training methods.


1972 ◽  
Vol 30 (3) ◽  
pp. 935-940 ◽  
Author(s):  
Bruce A. Baldwin

Twenty-five Ss participated in 5-day training programs emphasizing self-awareness, sensitivity to others, and development of basic interviewing skills. Ss were administered the Bieri Cognitive Complexity-Simplicity Scale early on the first day (pretest) and late on the last day (posttest) of training. Results showed significant changes from pre- to posttest on total cognitive complexity scores, as well as on subtotals associated with positive role titles. Changes were in the direction of greater cognitive simplicity. Previous counseling experience was also related to pretest total and positive subtotal cognitive complexity scores but was not related to pre- to posttest change scores. Pretest complexity scores and changes in interpersonal cognitive complexity were discussed as a function of defensive vigilance related to the potential threat of persons associated with positive and negative affect.


2015 ◽  
Vol 39 (10) ◽  
pp. 764-772 ◽  
Author(s):  
A. Jurado-Lavanant ◽  
J. Alvero-Cruz ◽  
F. Pareja-Blanco ◽  
C. Melero-Romero ◽  
D. Rodríguez-Rosell ◽  
...  

AbstractThe purpose of this study was to compare the effects of land- vs. aquatic based plyometric training programs on the drop jump, repeated jump performance and muscle damage. Sixty-five male students were randomly assigned to one of 3 groups: aquatic plyometric training group (APT), plyometric training group (PT) and control group (CG). Both experimental groups trained twice a week for 10 weeks performing the same number of sets and total jumps. The following variables were measured prior to, halfway through and after the training programs: creatine kinase (CK) concentration, maximal height during a drop jump from the height of 30 (DJ30) and 50 cm (DJ50), and mean height during a repeated vertical jump test (RJ). The training program resulted in a significant increase (P<0.01–0.001) in RJ, DJ30, and DJ50 for PT, whereas neither APT nor CG reached any significant improvement APT showed likely/possibly improvements on DJ30 and DJ50, respectively. Greater intra-group Effect Size in CK was found for PT when compared to APT. In conclusion, although APT seems to be a safe alternative method for reducing the stress produced on the musculoskeletal system by plyometric training, PT produced greater gains on reactive jumps performance than APT.


2021 ◽  
Vol 21 (1) ◽  
pp. 43-59
Author(s):  
Sérgio Mendes ◽  
Bruno Travassos ◽  
Ema P. Oliveira

Los responsables del arbitraje a nivel mundial han alentado el desarrollo de programas de formación formal, adecuados a las necesidades de la actividad de los árbitros de fútbol. De ahí que, este estudio tuvo como objetivo: i) analizar las percepciones de los árbitros expertos sobre la introducción de programas de formación formal a lo largo de su carrera (Academia de Arbitraje - AA - para árbitros de fútbol) en Portugal; ii) comprobar el impacto de AA en las calificaciones de los árbitros entre los árbitros que participaron en este modelo de capacitación y los que no lo hicieron. Para ello, se realizaron 2 estudios complementarios. En el estudio 1, se entrevistó a cinco expertos portugueses en arbitraje de fútbol, partiendo de una entrevista semiestructurada, con el análisis de contenido. En el estudio 2, se recogieron las calificaciones de los árbitros de la plantilla nacional 2009-18 (N = 243), que se agruparon de acuerdo con su formación: Grupo 1 (n = 82) promovidos directamente; Grupo 2 (n = 86) promovidos de categoría tras su formación en AA; Grupo 3 (n = 75) los que no fueron promovidos. Los resultados del estudio 1 revelaron: i) un cambio significativo en la estructuración de la formación de los árbitros portugueses tras la temporada 2013-14; ii) la existencia de lagunas en el proceso formativo y de clasificación; iii) la existencia de una cultura de individualismo y exigencia en el sector. Los resultados del estudio 2 solo revelaron diferencias significativas entre G3 y G2. Se concluye que se observaron mejoras en el proceso de formación, aunque no hubo mejoras significativas en el desempeño a nivel de la clasificación. La variable experiencia se identificó como un factor que influyó positivamente en la clasificación. Those responsible for global football refereeing have encouraged the development of formal training programs that meet the requirements of referee activity. Thus, this study aimed to: i) analyze the perceptions of expert referees about the introduction of formal training programs throughout the career (Academy of refereeing - AA - for football referees) in Portugal; (ii) verify the impact of the AA on the referees' performance in referees who participated in this training model and those who did not participate. For this purpose, 2 complementary studies were conducted. In study 1, five Portuguese football refereeing experts were interviewed, based on a semi-structured interview, with content analysis. In study 2, the performance of the referees of the national ranking of 2009-18 (N=243) were collected, and were grouped according to their training: Group 1 (n=82)  promoted directly; Group 2 (n=86) promoted from categories after training in AA; Group 3 (n=75) elements that have not been promoted. The results of study 1 revealed: i) a significant change in the training curriculum of Portuguese referees since 2013-14; (ii) the existence of gaps in the formative and classification process; iii) the existence of a culture of individualism and competition in the sector. The results of study 2 revealed only significant differences between the G3 and G2 groups. It was concluded that improvements in the training process were realized, although there were no significant improvements in performance. Experience was identified as the variable that positively influenced the referees’ performance. Os responsáveis pela arbitragem em termos mundiais têm estimulado o desenvolvimento de programas de formação formal que respondam às exigências da atividade de árbitro de futebol. Assim, este estudo pretendeu: i) analisar a perceções de árbitros especialistas sobre a introdução de programas de formação formais ao longo da carreira (Academia de Arbitragem – AA - para árbitros de futebol) em Portugal; ii) verificar o impacto da AA nas classificações dos árbitros entre árbitros que participaram neste modelo de formação e os que não integraram. Para tal foram realizados 2 estudos complementares. No estudo 1 foram entrevistados cinco especialistas portugueses de arbitragem de futebol, a partir de uma entrevista semiestruturada, com respetiva análise de conteúdo. No estudo 2 recolheram-se as classificações dos árbitros dos quadros nacionais de 2009-18 (N=243), tendo sido agrupadas de acordo com a sua formação: Grupo 1 (n=82) promovidos diretamente; Grupo 2 (n=86) promovidos de categorias após formação na AA; Grupo 3 (n=75) elementos que não foram promovidos. Os resultados do estudo 1 revelaram: i) uma mudança significativa na estruturação da formação dos árbitros portugueses a partir da época de 2013-14; ii) a existência de lacunas no processo formativo e classificativo; iii) a existência de uma cultura de individualismo e exigência no setor. Os resultados do estudo 2 apenas revelaram diferenças significativas entre o G3 e o G2. Conclui-se que foram percecionadas melhorias no processo de formação, embora não se verificaram melhorias significativas no desempenho classificativo. A variável experiência foi identificada como fator que influiu positivamente o desempenho classificativo.


2012 ◽  
Vol 7 (1) ◽  
pp. 68-75 ◽  
Author(s):  
Christos K. Argus ◽  
Nicholas D. Gill ◽  
Justin W.L. Keogh ◽  
Michael R. McGuigan ◽  
Will G. Hopkins

Purpose:There is little literature comparing contrast training programs typically performed by team-sport athletes within a competitive phase. We compared the effects of two contrast training programs on a range of measures in high-level rugby union players during the competition season.Methods:The programs consisted of a higher volume-load (strength-power) or lower volume-load (speed-power) resistance training; each included a tapering of loading (higher force early in the week, higher velocity later in the week) and was performed twice a week for 4 wk. Eighteen players were assessed for peak power during a bodyweight countermovement jump (BWCMJ), bodyweight squat jump (BWSJ), 50 kg countermovement jump (50CMJ), 50 kg squat jump (50SJ), broad jump (BJ), and reactive strength index (RSI; jump height divided by contact time during a depth jump). Players were then randomized to either training group and were reassessed following the intervention. Inferences were based on uncertainty in outcomes relative to thresholds for standardized changes.Results:There were small between-group differences in favor of strength-power training for mean changes in the 50CMJ (8%; 90% confidence limits, ±8%), 50SJ (8%; ±10%), and BJ (2%; ±3%). Differences between groups for BWCMJ, BWSJ, and reactive strength index were unclear. For most measures there were smaller individual differences in changes with strength-power training.Conclusion:Our findings suggest that high-level rugby union athletes should be exposed to higher volume-load contrast training which includes one heavy lifting session each week for larger and more uniform adaptation to occur in explosive power throughout a competitive phase of the season.


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