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Nikolaidis P.T.,Exercise Physiology Laboratory | Ziv G.,Wingate Institute | Ziv G.,Haifa University | Arnon M.,Wingate Institute | And 2 more authors.
Journal of Strength and Conditioning Research

The purpose of this study was twofold: (a) to profile physical characteristics and physiological attributes of adolescent and adult Greek female volleyball players (n = 61) who were members of the A (the best league for female volleyball players) and B (the second-best league for female volleyball players) Series clubs in Greece and (b) to examine the intraindividual variability among these players in all physical and physiological measurements that were undertaken in the study. The participants were divided into 3 age groups-under 14, 14-18, and over 18 years. They underwent a series of physical (e.g., height, body mass, and percentage of body fat) and physiological (e.g., aerobic profile, flexibility, and vertical jumping ability) tests. Three main findings emerged from the data analysis: (a) differences in physical characteristics and physiological attributes existed between the 3 age groups. For example, fat-free mass was lower in players under the age of 14 years (41.57 ± 6.06 kg) compared with that in players between the ages of 14-18 years (50.24 ± 6.96 kg) and players over the age of 18 years (52.03 ± 3.39 kg). In addition, the relative peak power as measured in the Wingate Anaerobic Test was the highest in the over- 18 group (9.72 ± 0.65 W·kg-1), lower in the 14-18 group (8.95 ± 0.7), and the lowest in the under-14 group (8.32 ± 0.78W·kg-1), (b) large intraindividual variability existed in most physical characteristics and physiological attributes measured in the study, and (c) the intraindividual variability was observed in all the 3 groups. These findings emphasize the need for coaches to examine the intraindividual variability within the players on their teams and to use this information when designing training programs and strength and conditioning programs. © 2012 National Strength and Conditioning Association. Source

Mokou E.,National and Kapodistrian University of Athens | Nikolaidis P.T.,Hellenic Army Academy | Nikolaidis P.T.,Exercise Physiology Laboratory | Padulo J.,Biomedical University of Rome | Apostolidis N.,National and Kapodistrian University of Athens
Sport Sciences for Health

Purpose: Free throws (FT) accuracy is a major determinant of performance in basketball game. However, the effect of exercise intensities on FT accuracy has not been well studied. The aim of the present study was to examine the effect of different exercise intensities on FT accuracy in young male basketball players. Methods: For this aim, 22 basketball players (age 16.12 ± 1.16 years, body mass 76.4 ± 13.3 kg and height 186.4 ± 8.9 cm), classified into 2 age groups (younger 15.28 ± 0.48 years, n = 11; older 16.97 ± 1.00 years, n = 11). The participants performed 50 FT under five conditions (i.e. 10 FT per condition): after rest (A), after 3 min shuttle running with ~9 km h−1 (B), ~9.5 km h−1 (C), ~10 km h−1 (D) and ~10.5 km h−1 (E). Results: The analysis of variance showed a main effect of exercise intensity on FT accuracy (p = 0.003, η2 = 0.585), heart rate (HR) (p < 0.001, η2 = 0.990) and rate of perceived exertion (RPE) (p < 0.001, η2 = 0.703): (a) FT accuracy in the C and D conditions was higher than the A condition (p ≤ 0.004); (b) all conditions differed for HR (p ≤ 0.047), the higher was the exercise intensity the higher was the HR, whereas no difference was revealed between D and E conditions; (c) the same trend as in the HR was observed in RPE (i.e. the higher the exercise intensity, the higher the RPE), too, where all conditions differed (p ≤ 0.047), except between C and D, and between D and E conditions. Conclusions: There was a significant exercise intensity × age interaction for RPE (p = 0.011, η2 = 0.516), but not for FT accuracy (p = 0.336, η2 = 0.224) or HR (p = 0.128, η2 = 0.329). The findings of the present study showed that a minimum of exercise intensity was necessary to achieve peak FT performance and a shape of inverse U was suggested for the relationship between FT accuracy and exercise intensity. © 2016, Springer-Verlag Italia. Source

Nikolaidis P.,Exercise Physiology Laboratory | Ziv G.,Wingate Institute | Ziv G.,Haifa University | Lidor R.,Wingate Institute | Arnon M.,Wingate Institute
Journal of Human Kinetics

The purpose of this study was twofold: (a) to profile physical characteristics and motor abilities of three age groups of soccer players - under 14 years, 14-17, and over 17, playing different positions - goalkeepers, defenders, midfielders, and forwards; and (b) to examine the inter-individual variability among the players in each age group in all physical and physiological measurements performed in the study. In addition, anthropometric, power, strength, and flexibility tests were administered. Findings showed large inter-individual variability in all three age groups and in all playing positions. Differences between playing positions were found only in the 14-17 group (body mass) and in the over-17 group (body height, body mass, fat-free mass, and mean power in the Wingate Anaerobic Test). Due to the observed large inter-individual variability, it was concluded that the findings obtained in the physical and physiological tests should be interpreted with caution when attempting to differentiate between successful and unsuccessful soccer players, as well as when trying to predict future success in soccer.© Editorial Committee of Journal of Human Kinetics. Source

De Oliveira Chachamovitz D.S.,Federal University of Rio de Janeiro | Dos Santos Vigario P.,Federal University of Rio de Janeiro | Dos Santos Vigario P.,Exercise Physiology Laboratory | Nogueira Cordeiro M.F.,Federal University of Rio de Janeiro | And 4 more authors.
American Journal of Clinical Oncology: Cancer Clinical Trials

OBJECTIVES: The aim of this study was to evaluate the fatigue perception, the muscle function, and the health-related quality of life (QoL) in subclinical hyperthyroidism (SCH) induced by levothyroxine in the treatment of differentiated thyroid carcinoma, in comparison with a group of euthyroid (EU) subjects. PATIENTS AND METHODS: A cross-sectional study with 38 SCH individuals and 54 EU subjects was performed. They were submitted to Short Form-36 and Chalder questionnaires to evaluate QoL and fatigue, respectively. The tests performed to evaluate muscle function of upper and lower limbs were: maximum quadriceps isometric strength (QS); quadriceps fatigue resistance (T50% QS), QS at 30 seconds (QS30s); quadriceps functional capacity (QFC); maximum isometric handgrip strength (HS); fatigue handgrip resistance (T50% HS), HS at 30 seconds (HS30s); and functional capacity of the shoulder. RESULTS AND CONCLUSIONS: The SCH patients had worse muscle function, regarding HS (25.19±7.00 vs. 30.45±9.98 kgf in EU, P=0.009) and functional capacity of the shoulder (41.28±48.36 vs. 56.68±37.44 s in EU, P=0.004). The self-perception of fatigue by Chalder questionnaire (23.91±5.39 vs. 29.77±7.03, P=0.000) and the QoL in terms of functional capacity (70.20±21.57 vs. 56.25±28.79, P=0.025), physical aspects (71.42±36.44 vs. 45.83±42.88, P=0.004), pain (62.48±22.20 vs. 50.05±24.80, P=0.035), and emotional aspects (70.74±38.26 vs. 46.29±44.56, P=0.008) were also worse in SCH. In conclusion, the SCH was associated with alterations in the QoL, reduction in the muscle function of upper limbs, and higher degree of fatigue. Copyright © 2012 by Lippincott Williams &Wilkins. Source

Farzaneh Hesari A.,Kharazmi University | Mirzaei B.,Guilan University | Mahdavi Ortakand S.,Kharazmi University | Rabienejad A.,Islamic Azad University at Gorgan | Nikolaidis P.T.,Exercise Physiology Laboratory
Apunts Medicina de l'Esport

Introduction: The purpose of this study was to assess the relationship between aerobic and anaerobic power, and special judo fitness test in elite male judokas. Method: Nineteen elite Judokas [age 24.3 (3.1)yr, height 1.78 (.06) m, body mass 76.4 (11.2) kg, body mass index 20.2 (3.6)kg·m-2 and body fat 11.0 (1.8)%] performed a graded exercise test in treadmill, the Wingate anaerobic test for arms and the special judo fitness test. The graded exercise test in treadmill estimated maximal oxygen uptake (VO2max) and the Wingate anaerobic test assessed peak and mean power, descriptors of short-term power output and local muscular endurance respectively. Results: The index of special judo fitness test was in inverse direct relationship with VO2max (r=-.87, p<.01), peak power (r=-.74, p<.01) and mean power (r=-.62, p<.05). Discussion: Based on these findings, it was showed that the special judo fitness test is a field test that describes chiefly aerobic power, and in a lesser degree short-term power output and local muscular fatigue. Therefore, its further use from judo coaches and fitness trainers as a measure to monitor aerobic power is recommended, and the need for a field test that will describe anaerobic power is highlighted. © 2012 Consell Català de l'Esport. Source

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