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1

The Effect of a 6-Week Plyometric Training on Explosive Power in Volleyball Players

100%

Jastrzebski Z., Wnorowski K., Mikolajewski R., Jaskulska E., Radziminski L.

Baltic Journal of Health and Physical Activity

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2014

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vol. 6

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issue 2

79-89

EN

Background: The purpose of the present study was to determine the effects of a six-week plyometric high and low-intensity training on the explosive power of lower limbs in volleyball players. Material/Methods: The research was conducted on a sample of 30 volunteers of the Sports Club at Gdansk University of Technology in Gdansk. Before the experiment, the players were divided into two homogeneous groups. After two weeks of an introductory common stage, each group followed a plyometric regime of different intensity. The results showed that the high-intensity program was more efficient than the low-intensity program in developing the explosive power in the volleyball players. Results: The largest significant improvement was observed for the vertical jump with arm swing (11% in HIJG and 3.8% in LISG). The strongest correlations were registered for the maximal power and the total mechanical work obtained in the Wingate test (r=0.83), and the power of jumps during attacks and blocks (r=0.78). Conclusions: The experiment confirmed high effectiveness of the training loads applied in the experiment, in particular in the high-intensity program.

2

Short-Term Performance Effects of Three Different Low-Volume Strength-Training Programmes in College Male Soccer Players

100%

Brito J., Vasconcellos F., Oliveira J., Krustrup P., Rebelo A.

Journal of Human Kinetics

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2014

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vol. 40

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issue 1

121-128

EN

This study aimed to analyse the short-term performance effects of three in-season low-volume strength-training programmes in college male soccer players. Fifty-seven male college soccer players (age: 20.3 [...] 1.6 years) were randomly assigned to a resistance-training group (n=12), plyometric training group (n=12), complex training group (n=12), or a control group (n=21). In the mid-season, players underwent a 9-week strength-training programme, with two 20 min training sessions per week. Short-term effects on strength, sprint, agility, and vertical jump abilities were measured. All training groups increased 1-RM squat (range, 17.2-24.2%), plantar flexion (29.1-39.6%), and knee extension (0.5- 22.2%) strength compared with the control group (p<0.05). The resistance-training group increased concentric peak torque of the knee extensor muscles by 9.9-13.7%, and changes were greater compared with the control group (p<0.05). The complex training group presented major increments (11.7%) in eccentric peak torque of the knee flexor muscles on the non-dominant limb compared with the control group and plyometric training group (p<0.05). All training groups improved 20-m sprint performance by 4.6-6.2% (p<0.001) compared with the control group. No differences were observed in 5-m sprint and agility performances (p>0.05). Overall, the results suggest that in-season low-volume strength training is adequate for developing strength and speed in soccer players.

3

The Effects of a Six-week Plyometric Training Program on the Stiffness of Anterior and Posterior Muscles of the Lower Leg in Male Volleyball Players

100%

Mroczek D., Superlak E., Seweryniak T., Maćkała K., Konefał M., Chmura P., Borzucka D., Rektor Z., Chmura J.

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2017

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vol. 20

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issue 4

107-115

EN

The study assesses the effects of a six-week plyometric training program (PT) on muscle stiffness in the dominant and non-dominant leg in male collegiate volleyball players. The study group comprised 16 volleyball players who had played collegiate volleyball for at least four years. For six consecutive weeks, twice a week, the players undertook a plyometric program of 60-min training sessions, each preceded with a specialist warm-up. The analysis of the anterior muscles of the right and the left lower leg revealed a significant increase in stiffness in the muscles of the right leg and the left leg. No significant differences were found between the anterior muscles of the left lower leg and the right lower leg in particular weeks of the training program. The analysis of the posterior lower leg muscles revealed no significant differences, either in the consecutive weekly training microcycles or between the left leg and the right leg. The measurement of muscle tone and biomechanical properties of muscles can be used as a fast and direct assessment of plyometric training-related muscle fatigue. A similar level of muscle stiffness in both lower legs (symmetry) is a reflection of the appropriate selection of plyometric training loads.

4

Ocena wpływu treningu plyometrycznego na sztywność mięśnia prostego uda u zawodników siatkówki, mierzona miotonometrem

75%

Mrozik K., Błach B., Kusiak M., Janusiak M., Pożarowszczyk B., Kisilewicz A., Kawczyński A., Urbaniak M.

Polish Journal of Sports Medicine

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2017

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vol. 33(4)

273-279

EN

Background. Stretch – shortening cyccle plays an important role in sport, especially in professional sports. Athletes” plyometric capabilities of are regulated by their ability of effective cycle usage. The aim of the study was to investigate the changes in rectus femoris muscle stiffness in volleyball players after plyometric training. Metrial and methods. Seven volleyball players were tested. For two weeks a specially prepared plyometric training was performed. Stiffness of the rectus femoris muscle was tested using MyotonPro, before and after 1 and 2 weeks of training. The measurements were performed on two points on rectus femoris in the supine position. Analysis of variance for repeated measurments was used to determine statistical significance. Results After two weeks of training for both measured points, statisticaly significant changes in rectus femoris muscle stiffness were noted. After one week of training were no significant changes in muscle stiffness were noted. Conclusions. 1. Two week plyometric training cycle has a statistically significant effect on the decrease in rectus femoris muscle stiffness in volleyball players. 2. A week of plyometric training has no influence on the changes in rectus femoris stiffness.

PL

Wstęp. Cykl rozciągnięcie – skurcz ma duże znaczenie dla efektywności ruchu, szczególnie w sporcie wyczynowym. Zdolności plyometryczne zawodnika są regulowane poprzez zdolność efektywnego wykorzystania tego cyklu. Celem pracy było określenie zmian sztywności mięśnia prostego uda u siatkarzy pod wpływem treningu plyometrycznego. Materiał i metody. W badaniu udział wzięło 7 siatkarzy. Badani wykonywali przez 2 tygodnie specjalnie przygotowany trening plyometryczny. Przed, po 1-szym i po 2-gim tygodniu treningu mierzono sztywność mięśnia prostego uda za pomocą miotonometru MyotonPro. Pomiary były prowadzone w dwóch punktach na mięśniu prostym uda w pozycji leżenia tyłem. W analizie statystycznej posłużono się testem analizy wariancji dla pomiarów powtarzanych. Wyniki. Po dwóch tygodniach treningu, dla obu mierzonych punktów zanotowano istotne statystycznie zmniejszenie sztywności mięśnia prostego uda. Po tygodniu treningu zmiana sztywności mięśnia prostego uda nie była istotna statystycznie. Wnioski. 1. Dwutygodniowy trening plyometryczny u siatkarzy wpływa istotnie na zmniejszenie sztywności mięśnia prostego uda. 2. Tydzień treningu plyometrycznego nie powoduje istotnych statystycznie zmian sztywności mięśnia prostego uda.

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Ocena stanu odżywienia i parametrów składu ciała u młodzieży w wieku 16-18 lat rozpoczynającej programowany trening fitness

63%

Zapolska J., Piotrowska-Jastrzębska J., Białokoz-Kalinowska I., Ostrowska L.

Pediatria i Medycyna Rodzinna

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2009

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vol. 5

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issue 4

259-263

EN

Introduction: The obesity epidemic has begun in the 80s and is still spreading which makes it a serious social and medical problem for the contemporary world. WHO stated that obesity is a chronic disease which requires complex treatment (special diet, change in a life style, physical activity). Both, individual workout performed on the aerobic equipment and resistance training, are crucial for obesity treatment. Propagating healthy lifestyle and proper eating habits among the whole nation is the basis for preventing and curing obesity and overweight. Aim of paper: The aim of the research was to evaluate the diet and the body composition in a group of adolescence, aged 16-18 beginning yearly professionally designed fitness program. Material and methods: The group of 90 girls and 64 boys began a specially designed fitness program which lasted 12 months. The nutritional state together with the body composition was evaluated with the use of bioelectrical impedance method (equipment InBody 220, producer Biospace). Results: The average BMI of the beforehand mentioned group was 23.3 [kg/m2] in girls and 24.4 [kg/m2] in boys. Although the BMI was close to normal the average amount of body fat was too high in girls (28.7%). In the group of girls the BMI showed a proper weight, however the amount of body fat was too high, it was suggested that the amount of fat tissue was decreased while the amount of skeletal muscles was increased. These data show that the proper body proportions were shaken. Conclusions: Professional equipment used for evaluation of the body composition helps to create a detailed program for fat reduction and muscle tissue growth together with creating a professional individual training program.

PL

Wstęp: Epidemia otyłości notowana od lat 80. XX wieku trwa nadal, stając się poważnym problemem medyczno- -społecznym współczesnego świata. WHO uznała otyłość za przewlekłą chorobę wymagającą kompleksowego leczenia z zastosowaniem właściwej diety, zmiany stylu życia z uwzględnieniem aktywności fizycznej. Promocja zdrowego stylu życia oraz właściwych nawyków żywieniowych adresowana do całej populacji stanowi podstawę prewencji i leczenia nadwagi i otyłości. Celem pracy była ocena stanu odżywienia i parametrów składu ciała w grupie młodzieży w wieku 16-18 lat rozpoczynającej 12-miesięczny programowany trening fitness. Materiał i metody: Grupę badaną stanowiło 90 dziewcząt i 64 chłopców, zakwalifikowanych do długofalowych badań oceniających wpływ ćwiczeń fizycznych na parametry składu ciała i wybrane wskaźniki biomedyczne. Stan odżywienia i skład ciała badanych oceniano metodą impedancji bioelektrycznej z zastosowaniem urządzenia InBody 220 (producent Biospace). Wyniki: Średnie wartości BMI w badanej grupie młodzieży wynosiły 23,3 u dziewcząt i 24,4 u chłopców i mieściły się w granicach przyjętej normy. Pomimo prawidłowych wartości wskaźnika BMI w obu badanych grupach procentowa zawartość tkanki tłuszczowej u dziewcząt przekraczała optymalne wartości i wynosiła 28,7%. Analiza komputerowa składu ciała pomimo prawidłowych wartości BMI wskazywała w grupie dziewcząt potrzebę redukcji tkanki tłuszczowej przy jednoczesnym wzroście masy mięśni szkieletowych. Wnioski: Badanie składu ciała z zastosowaniem urządzeń wyposażonych w komputerowe analizatory pozwala precyzyjnie określić skład ciała badanych i wskazać kierunki prawidłowego indywidualnego programu treningowego.

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The Effect of a 6-Week Plyometric Training on Explosive Power in Volleyball Players

Short-Term Performance Effects of Three Different Low-Volume Strength-Training Programmes in College Male Soccer Players

The Effects of a Six-week Plyometric Training Program on the Stiffness of Anterior and Posterior Muscles of the Lower Leg in Male Volleyball Players

Ocena wpływu treningu plyometrycznego na sztywność mięśnia prostego uda u zawodników siatkówki, mierzona miotonometrem

Ocena stanu odżywienia i parametrów składu ciała u młodzieży w wieku 16-18 lat rozpoczynającej programowany trening fitness