scholarly journals O efeito do esforço na estabilidade postural em jovens jogadores de futebol

2013 ◽  
Vol 21 (3) ◽  
pp. 155-158 ◽  
Author(s):  
Gustavo Gonçalves Arliani ◽  
Gabriel Peixoto Leão Almeida ◽  
Ciro Veronese dos Santos ◽  
André Manrique Venturini ◽  
Diego da Costa Astur ◽  
...  
Keyword(s):  
Hop Test ◽  
Biodex Stability System

OBJETIVO: Analisar os efeitos do esforço físico de partida de futebol na capacidade funcional e estabilidade dos membros inferiores em jovens jogadores de futebol. MÉTODOS: Foram analisados 10 atletas jogadores de futebol submetidos a avaliação da capacidade funcional dos membros inferiores através de um protocolo de Hop Test e avaliação do nível de estabilidade postural através do Biodex Stability System (Biodex, Inc., Shirley, Nova Iorque), antes e imediatamente após um tempo de jogo amistoso de futebol de campo com duração de 45 minutos. RESULTADOS: Após a partida, ocorreu uma diminuição no índice de estabilidade global (F(1,23) = 7,29 P = .024) e índice anteroposterior (APSI) (F(1,23) = 5,53 P = .043). A fadiga no membro dominante foi a responsável pelo déficit significativo no OSI (F(1,23) = 3.16, P = .047) e APSI (F(1,23) = 3.49, P = .029), enquanto o membro não-dominante não gerou qualquer alteração na condição pré e pós- jogo. CONCLUSÃO: Uma partida de futebol pode causar diminuição da estabilidade e capacidade funcional dos membros inferiores em jovens jogadores. Nível de evidência iii, pré-teste e pós-teste (caso-controle).

scholarly journals Effect of Resisted Sprint and Plyometric Training on Lower Limb Functional Performance in Collegiate Male Football Players: A Randomised Control Trial

2021 ◽  
Vol 18 (13) ◽  
pp. 6702
Author(s):  
Shahnaz Hasan ◽  
Gokulakannan Kandasamy ◽  
Danah Alyahya ◽  
Asma Alonazi ◽  
Azfar Jamal ◽  
...  
Keyword(s):  
Functional Performance ◽  
Group Analysis ◽  
Training Group ◽  
Control Group ◽  
Football Players ◽  
Plyometric Training ◽  
Sprint Training ◽  
Short Term ◽  
Hop Test ◽  
Collegiate Football

The main objectives of this study were to evaluate the short-term effects of resisted sprint and plyometric training on sprint performance together with lower limb physiological and functional performance in collegiate football players. Ninety collegiate football players participated in this three-arm, parallel group randomized controlled trial study. Participants were randomly divided into a control group and two experimental groups: resisted sprint training (RST) (n = 30), plyometric training (PT) (n = 30), and a control group (n = 30). Participants received their respective training program for six weeks on alternate days. The primary outcome measures were a knee extensor strength test (measured by an ISOMOVE dynamometer), a sprint test and a single leg triple hop test. Measurements were taken at baseline and after 6 weeks post-training. Participants, caregivers, and those assigning the outcomes were blinded to the group assignment. A mixed design analysis of variance was used to compare between groups, within-group and the interaction between time and group. A within-group analysis revealed a significant difference (p < 0.05) when compared to the baseline with the 6 weeks post-intervention scores for all the outcomes including STN (RST: d = 1.63; PT: d = 2.38; Control: d = 2.26), ST (RST: d = 1.21; PT: d = 1.36; Control: d = 0.38), and SLTHT (RST: d = 0.76; PT: d = 0.61; Control: d = 0.18). A sub-group analysis demonstrated an increase in strength in the plyometric training group (95% CI 14.73 to 15.09, p = 0.00), an increase in the single leg triple hop test in the resisted sprint training group (95% CI 516.41 to 538.4, p = 0.05), and the sprint test was also improved in both experimental groups (95% CI 8.54 to 8.82, p = 0.00). Our findings suggest that, during a short-term training period, RST or PT training are equally capable of enhancing the neuromechanical capacities of collegiate football players. No adverse events were reported by the participants.

scholarly journals Associations between Inter-Limb Asymmetries in Jump and Change of Direction Speed Tests and Physical Performance in Adolescent Female Soccer Players

2021 ◽  
Vol 18 (7) ◽  
pp. 3474
Author(s):  
Elena Pardos-Mainer ◽  
Chris Bishop ◽  
Oliver Gonzalo-Skok ◽  
Hadi Nobari ◽  
Jorge Pérez-Gómez ◽  
...  
Keyword(s):  
Physical Performance ◽  
Age Groups ◽  
Soccer Players ◽  
Adolescent Female ◽  
Specific Training ◽  
Countermovement Jump ◽  
Change Of Direction ◽  
Percentage Difference ◽  
Hop Test ◽  
Physical Tests

The association between asymmetries in jump and change of direction (COD) with physical performance in several sports show inconclusive results. The purposes of this study were to: (1) measure inter-limb asymmetries in three distinct groups in adolescent female soccer players and, (2) to determine the association between inter-limb asymmetries and physical performance in different age groups. Fifty-four players were distributed in three age groups: U-18, U-16 and U-14. All of them performed a series of jumps, sprints and change of direction speed tests. Asymmetries were assessed as the percentage difference between limbs, with the equation: 100/Max value (right and left) * in value (right and left) * −1 + 100. Mean inter-limb asymmetries were 2.91%, 4.82% and 11.6% for 180° COD, single leg hop and single leg countermovement jump tests respectively, but higher percentages of asymmetries were observed in many players individually. U-18 and U-16 showed significant differences on 180° left COD compared to U-14. Effect size (ES): 0.80 and 0.74, respectively; U-18 presented differences on single left leg hop test compared to U-14, ES: −0.72; U-16 also showed differences on 40 m speed compared to U-14, ES 0.87 (All p < 0.05). Jumping and COD physical tests show asymmetries in adolescent female soccer players, but these asymmetries do not interfere with physical performance. The largest asymmetry was observed in the single leg countermovement jump, and no asymmetries between groups were found. Due to the high variability in the direction of asymmetries, it is recommended to consider players’ individual asymmetries for designing specific training programs.

Evaluation of dynamic postural balance using the Biodex Stability System in rheumatoid arthritis patients

2005 ◽  
Vol 25 (4) ◽  
pp. 462-467 ◽  
Author(s):  
Ece Aydoğ ◽  
Ajda Bal ◽  
Sedat Tolga Aydoğ ◽  
Aytül Çakci
Keyword(s):  
Rheumatoid Arthritis ◽  
Postural Balance ◽  
Biodex Stability System

Results of a modified front hop test for decision-guiding: feasibility, validity, and reliability

2021 ◽  
Vol 29 ◽  
pp. S395-S396
Author(s):  
E. Kurz ◽  
M. Keller ◽  
W. Schoch ◽  
T. Stein
Keyword(s):  
Validity And Reliability ◽  
Hop Test

Responsiveness of the One-Leg Hop Test and the Square Hop Test to Fatiguing Intermittent Aerobic Work and Subsequent Recovery

2013 ◽  
Vol 27 (4) ◽  
pp. 988-994 ◽  
Author(s):  
Anette G.M. Ros ◽  
Susanne E. Holm ◽  
Cecilia Fridén ◽  
Annette I.-L.M. Heijne
Keyword(s):  
Subsequent Recovery ◽  
Hop Test ◽  
The One

scholarly journals Age, time from injury to surgery and quadriceps strength affect the risk of revision surgery after primary ACL reconstruction

2021 ◽  
Author(s):  
Riccardo Cristiani ◽  
Magnus Forssblad ◽  
Gunnar Edman ◽  
Karl Eriksson ◽  
Anders Stålman
Keyword(s):  
Risk Factors ◽  
Potential Risk ◽  
Revision Surgery ◽  
Quadriceps Strength ◽  
Activity Level ◽  
Hop Test ◽  
Potential Risk Factors ◽  
Tegner Activity Level ◽  
Single Leg Hop Test ◽  
Time From Injury

Abstract Purpose To identify preoperative, intraoperative and postoperative factors associated with revision anterior cruciate ligament reconstruction (ACLR) within 2 years of primary ACLR. Methods Patients who underwent primary ACLR at our institution, from January 2005 to March 2017, were identified. The primary outcome was the occurrence of revision ACLR within 2 years of primary ACLR. Univariate and multivariate logistic regression analyses were used to evaluate preoperative [age, gender, body mass index (BMI), time from injury to surgery, pre-injury Tegner activity level], intraoperative [graft type, graft diameter, medial meniscus (MM) and lateral meniscus (LM) resection or repair, cartilage injury] and postoperative [side-to-side (STS) anterior laxity, limb symmetry index (LSI) for quadriceps and hamstring strength and single-leg-hop test performance at 6 months] risk factors for revision ACLR. Results A total of 6,510 primary ACLRs were included. The overall incidence of revision ACLR within 2 years was 2.5%. Univariate analysis showed that age < 25 years, BMI < 25 kg/m2, time from injury to surgery < 12 months, pre-injury Tegner activity level ≥ 6, LM repair, STS laxity > 5 mm, quadriceps strength and single-leg-hop test LSI of ≥ 90% increased the odds; whereas, MM resection and the presence of a cartilage injury reduced the odds of revision ACLR. Multivariate analysis revealed that revision ACLR was significantly related only to age < 25 years (OR 6.25; 95% CI 3.57–11.11; P < 0.001), time from injury to surgery < 12 months (OR 2.27; 95% CI 1.25–4.17; P = 0.007) and quadriceps strength LSI of ≥ 90% (OR 1.70; 95% CI 1.16–2.49; P = 0.006). Conclusion Age < 25 years, time from injury to surgery < 12 months and 6-month quadriceps strength LSI of ≥ 90% increased the odds of revision ACLR within 2 years of primary ACLR. Understanding the risk factors for revision ACLR has important implications when it comes to the appropriate counseling for primary ACLR. In this study, a large spectrum of potential risk factors for revision ACLR was analyzed in a large cohort. Advising patients regarding the results of an ACLR should also include potential risk factors for revision surgery. Level of evidence III.

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