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1.
J Sports Med Phys Fitness ; 62(4): 435-447, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33768775

RESUMO

BACKGROUND: The purpose of this study was to investigate the effectiveness of different ankle strengthening training programs: eccentric, concentric, and resistance bands, on performance of university level sedentary males. METHODS: Sixty-three males between the ages of 18 and 26 years were randomized to either eccentric isokinetic (N.=21), concentric isokinetic (N.=21), and resistance bands ankle strengthening groups (N.=21). Training was performed three days a week, for eight weeks for both sides of ankle. Each program was made progressively harder by increasing the number of repetitions or sets. Measurements evaluating strength, balance and jumping performance were repeated pre, post and at one month (follow-up) after training. RESULTS: Statistical significance was observed for concentric evertor strength for both sides of the ankle for all groups after training (P<0.05). In addition, statistically significant increases were seen in jumping performance for all groups and dynamic balance for eccentric and concentric groups (P<0.05), with the concentric being statistically higher compared to the resistance bands group for all parameters (P<0.05). CONCLUSIONS: Ankle isokinetic strength (eccentric, concentric) training is more effective than resistance bands regarding improvement on strength, explosive strength, and dynamic balance. Ankle isokinetic strength training, which includes evertor and invertor muscles, improves performance, especially when applied concentrically. Therefore, the proper strengthening of ankle muscles will prevent the re-injury of ankles with individuals returning to activities.


Assuntos
Instabilidade Articular , Treinamento de Força , Adolescente , Adulto , Tornozelo , Articulação do Tornozelo , Humanos , Masculino , Músculo Esquelético/fisiologia , Adulto Jovem
2.
J Strength Cond Res ; 34(4): 1166-1175, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-32213784

RESUMO

Kalaycioglu, T, Apostolopoulos, NC, Goldere, S, Duger, T, and Baltaci, G. Effect of a core stabilization training program on performance of ballet and modern dancers. J Strength Cond Res 34(4): 1166-1175, 2020-The aim of this study was to investigate the effects of a core stabilization training (CST) program on performance of university-level ballet and modern dancers. Twenty-four dancers between the ages of 18 and 24 years participated in the study. Core stabilization training was performed for 45-60 minutes per day, 3 days a week, for 8 weeks. For 2 days, the training was conducted by an experienced physiotherapist, and the other day, each participant exercised on his or her own. Evaluation of physical fitness parameters included vertical jump performance, flexibility, dynamic balance, coordination, proprioception, muscle, and hip flexion isokinetic strength measures. Wilcoxon signed rank test was used to compare pre- and post-test values. Statistically significant increases in vertical jump performance, dynamic balance, proprioception, and coordination parameters between pre- and post-training (p < 0.05) were observed. After the CST program, peak torque values for the hip flexor muscle isokinetic test of the dancers decreased (p < 0.05). Therefore, the results suggest that the CST program might be used to improve several physical fitness parameters such as jumping, proprioception, coordination, and dynamic balance. Such improvements will aid in the development of artistic skills for university modern dancers.


Assuntos
Dança/fisiologia , Força Muscular/fisiologia , Equilíbrio Postural/fisiologia , Propriocepção/fisiologia , Treinamento de Força/métodos , Adolescente , Adulto , Voluntários Saudáveis , Humanos , Músculo Esquelético/fisiologia , Aptidão Física/fisiologia , Adulto Jovem
3.
Appl Physiol Nutr Metab ; 43(8): 806-815, 2018 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-29529387

RESUMO

Effects of passive static stretching intensity on recovery from unaccustomed eccentric exercise of right knee extensors was investigated in 30 recreationally active males randomly allocated into 3 groups: high-intensity (70%-80% maximum perceived stretch), low-intensity (30%-40% maximum perceived stretch), and control. Both stretching groups performed 3 sets of passive static stretching exercises of 60 s each for hamstrings, hip flexors, and quadriceps, over 3 consecutive days, post-unaccustomed eccentric exercise. Muscle function (eccentric and isometric peak torque) and blood biomarkers (creatine kinase and C-reactive protein) were measured before (baseline) and after (24, 48, and 72 h) unaccustomed eccentric exercise. Perceived muscle soreness scores were collected immediately (time 0), and after 24, 48, and 72 h postexercise. Statistical time × condition interactions observed only for eccentric peak torque (p = 0.008). Magnitude-based inference analyses revealed low-intensity stretching had most likely, very likely, or likely beneficial effects on perceived muscle soreness (48-72 h and 0-72 h) and eccentric peak torque (baseline-24 h and baseline-72 h), compared with high-intensity stretching. Compared with control, low-intensity stretching had very likely or likely beneficial effects on perceived muscle soreness (0-24 h and 0-72 h), eccentric peak torque (baseline-48 h and baseline-72 h), and isometric peak torque (baseline-72 h). High-intensity stretching had likely beneficial effects on eccentric peak torque (baseline-48 h), but likely had harmful effects on eccentric peak torque (baseline-24 h) and creatine kinase (baseline-48 h and baseline-72 h), compared with control. Therefore, low-intensity stretching is likely to result in small-to-moderate beneficial effects on perceived muscle soreness and recovery of muscle function post-unaccustomed eccentric exercise, but not markers of muscle damage and inflammation, compared with high-intensity or no stretching.


Assuntos
Músculos Isquiossurais/fisiologia , Contração Isométrica , Força Muscular , Exercícios de Alongamento Muscular/métodos , Músculo Quadríceps/fisiologia , Adulto , Biomarcadores/sangue , Fenômenos Biomecânicos , Proteína C-Reativa/metabolismo , Creatina Quinase/sangue , Inglaterra , Músculos Isquiossurais/metabolismo , Humanos , Masculino , Mialgia/etiologia , Mialgia/prevenção & controle , Músculo Quadríceps/metabolismo , Recuperação de Função Fisiológica , Fatores de Tempo , Torque , Resultado do Tratamento , Adulto Jovem
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