scholarly journals Knee Pads Do Not Affect Physical Performance in Young Female Volleyball Players

Children ◽  
2021 ◽  
Vol 8 (9) ◽  
pp. 748
Author(s):  
Anja Lazić ◽  
Milovan Bratić ◽  
Stevan Stamenković ◽  
Slobodan Andrašić ◽  
Nenad Stojiljković ◽  
...  
Keyword(s):  
Lower Extremities ◽  
Young Female ◽  
T Test ◽  
Arm Swing ◽  
Linear Speed ◽  
Positive Effects ◽  
Explosive Power ◽  
Increased Risk ◽  
Volleyball Players ◽  
Physical Abilities

Knee pads have become increasingly popular among volleyball players. Given the fact high-intensity activities that are crucial to successfully playing this sport lead to an increased risk of a knee injury, the primary use of knee pads is to prevent potential injury. However, no research has been carried out to explain the effects of knee pads on the most important physical abilities in volleyball players, thus directly affecting performance. This study was undertaken to determine the effects of knee pads on the explosive power of the lower extremities, linear speed, and agility in young female volleyball players. In two separated sessions, 84 female volleyball players (age: 14.83 ± 0.72 years; height: 163.19 ± 8.38 cm; body mass: 53.64 ± 10.42 kg; VE: 5.30 ± 3.39 years) completed squat jumps (SJ), countermovement jumps (CMJ) with and without arm swing, linear sprints at 5-m and 10-m, modified t-test, and 5-10-5 shuttle test. Data analyses included descriptive statistics, paired sample T-tests and use of effect size (ES). There was no statistical difference between the two conditions for SJ (p = 0.156; ES = 0.18), CMJ (p = 0.817; ES = 0.03), CMJ with arm swing (p = 0.194; ES = 0.14), linear sprint at 5 m (p = 0.789; ES = 0.03) and 10 m (p = 0.907; ES = −0.01), modified t-test (p = 0.284; ES = 0.13), and 5-10-5 shuttle test (p = 0.144; ES = 0.19). Wearing knee pads has neither an inhibitory nor positive effects on explosive power of the lower extremities, linear speed, and agility in young female volleyball players.

scholarly journals THE ADDITION BALLISTIC STRETCHING ON KNEE TUCK JUMP EXERCISE MORE EFFECTIVE THAN KNEE TUCK JUMP EXERCISE TO INCREASE POWER OF LEG MUSCLE OF VOLLEYBALL PLAYERS MALE IN THE FACULTY OF MEDICINE UDAYANA UNIVERSITY

2018 ◽  
Vol 6 (1) ◽  
pp. 18
Author(s):  
I Made Dwi Apri Pramana ◽  
I Putu Sutha Nurmawan ◽  
I Putu Adiartha Griadhi ◽  
Ida Ayu Dewi Wiryanthini
Keyword(s):  
Muscle Power ◽  
Vertical Jump ◽  
T Test ◽  
Control Group ◽  
Explosive Power ◽  
Jump Exercise ◽  
Jump Test ◽  
Volleyball Players ◽  
Leg Muscle ◽  
Leg Muscle Power

Muscle power was defined as the combination between speed and strenght of muscle contraction and enters in the fitness components. Plyometrics exercises can be used to improve the skills of volleyball players. This study was an experimental study using research designs pre test and post test control group design. The sampling technique inthis study with a simple random sampling. The total sample of 20 person so in one group consisted of 10 person. The first group was given additional ballistic stretching on knee tuck jump exercise. The second group was given knee tuck jump exercise. Measurements of leg muscle power using vertical jump test. Normality test p > 0.05 and homogeneitytest p > 0.05. The results showed an increase in leg muscle power in first group amounted to 14.30 cm and in second group an increase of 7.70 cm. Paired samples t-test p value = 0.000 (p <0.05) in first group and p = 0.000 (p < 0.05) in second group. Test increase explosive power leg muscle after exercise in both groups using independent sample t-test obtained first group and second group where p = 0.000 (p <0.05) with an increase in the percentage of 30.95% in the first group and 16.73% in the second group. From the research done can be concluded that the addition of ballisticstretching on knee tuck jump exercise is more effective than knee tuck jump exercise in increasing explosive power leg muscle in male volleyball players Medical Faculty Of Udayana University. Keywords: muscle power, ballistic stretching, knee tuck jump, vertical jump test.

scholarly journals Body composition and performance variables differences in female volleyball players by agegroup and playing position

2019 ◽  
Vol 21 ◽  
Author(s):  
Lucas Samuel Tessutti ◽  
Samuel da Silva Aguiar ◽  
Gustavo De Conti Teixeira Costa ◽  
Filipe Manuel Clemente ◽  
Ricardo Franco Lima ◽  
...  
Keyword(s):  
Bone Mass ◽  
Physical Performance ◽  
Age Groups ◽  
Young Female ◽  
Abdominal Muscles ◽  
Performance Variables ◽  
Explosive Power ◽  
Volleyball Players ◽  
And Performance ◽  
Shuttle Run

Abstract The aim of the present study was to evaluate the age and inter- and intra-position differences in the anthropometric variables and physical performance in young female players of Brazilian women's volleyball. Fifty-eight female volleyball players participated, divided into 3 age groups: (a) 14 and under (n=20; mean age = 12.6±0.7 years), (b) between 14 and 17 (n=31; mean age = 15.6±1.2 years), and (c) over 17 (n=7; mean age = 18.9±0.9 years). In addition, the players were also divided according to their positions: setters (n=7), opposites (n=13), passer-hitters (n=17), middle blockers (n=12) and liberos (n=9). Anthropometric characteristics, flexibility, strength / resistance abdominal muscles, pushups, explosive power of the arms, jumping abilities, shuttle run and 20-m sprint tests were evaluated. Analyses showed differences among age and playing positions for the height and bone mass (p<0.05). In the fitness assessment, no differences were found between playing positions (p>0.05). However, differences were found among for age groups horizontal jump, shuttle run and 20-m sprint, with players >17 performing better than <14 and between 14-17 years of age (p<0.05). These results demonstrated that the height, bone mass and horizontal jump, shuttle run and 20-m sprint are age dependent, while physical performance independent on the playing positions.

scholarly journals RELATIONSHIP BETWEEN MORPHOLOGICAL CHARACTERISTICS AND PHYSICAL ABILITIES IN VOLLEYBALL PLAYERS

2021 ◽  
Vol 18 (2) ◽  
pp. 53-57
Author(s):  
Goran Glamočić ◽  
Branislav Strajnić ◽  
Branko Đukić ◽  
Vladimir Ivanek
Keyword(s):  
Morphological Characteristics ◽  
Limit Value ◽  
Volleyball Player ◽  
Explosive Power ◽  
Counter Movement Jump ◽  
Volleyball Players ◽  
Physical Abilities ◽  
Autonomous Province ◽  
The Right ◽  
The Relationship

This research aims to determine the relationship between morphological characteristics and abilities in volleyball players. It was conducted on the territory of Vojvodina autonomous province on a sample of 27 male volleyball players with an average age of 17.48 ± 0.50 years and an average sports experience of 6.33 ± 2.83 years. A test battery consisting of five variables for measuring morphological characteristics and twelve tests of abilities was applied: flexibility, speed, agility, endurance, static and explosive power. The normality of the data distribution was controlled by the Shapiro-Wilk test, and the connection between morphological characteristics and abilities was calculated by the Spearman ro correlation coefficient. The limit value for testing the normality of distribution of p> 0.05 was not met by: body mass index (p = 0.01), straddle in supine position (p = 0.03), single leg counter movement jump with the left leg (p = 0.01) and Yo-Yo Intermittent endurance test level 2 (p = 0.02). The connection of morphological characteristics with explosive power tests is especially noticeable, the most significant is the range of arms span with continuous jump with bent legs (ro = 0.75), single leg counter movement jump with the right leg (ro = 0.74) and Counter movement jump (ro = 0.63). The main finding in this study is that morphological characteristics are mostly negatively correlated with the explosive power of volleyball players. It is known that these characteristics and abilities have a significant share in the model of the ideal volleyball player and therefore their negative connections, the approach to the selection of volleyball and volleyball training must be based on scientific knowledge. Key words: measurement, testing, diagnostics, test batteries, volleyball

scholarly journals Effects of Neuromuscular Training on Motor Competence and Physical Performance in Young Female Volleyball Players

2020 ◽  
Vol 17 (5) ◽  
pp. 1755 ◽  
Author(s):  
Nebojša Trajković ◽  
Špela Bogataj
Keyword(s):  
Physical Performance ◽  
Vertical Jump ◽  
Young Female ◽  
T Test ◽  
Neuromuscular Training ◽  
Control Group ◽  
Motor Competence ◽  
Significant Group ◽  
Time Interaction ◽  
Volleyball Players

Although neuromuscular training (NMT) emphasizes injury prevention training, there is little information about its effects on performance in young athletes. This study aimed to investigate the effects of eight-weeks NMT on motor competence and physical performance in 10- to 12-year-old female volleyball players. Sixty-six participants (mean ± SD; 11.05 ± 0.72 years) were randomized into either the NMT group (NTG; n = 32) or control group (CON; n = 34). Sprint on 10-m, modified T-test, plank, vertical jump, and medicine ball throw tests were used to assess the physical performance. The Körperkoordinationstest für Kinder (KTK) was used to assess the subjects’ motor competence. The NMT was performed twice a week during the first 30 min of each regularly scheduled 90-minute volleyball training. Participants in the CON group attended only their regular volleyball training. A significant group x time interaction was found for Motor Quotient KTK (MQKTK) (p < 0.001), KTK lateral jumps (p < 0.001), and KTK shifting platforms (p < 0.01). There was a significant interaction for modified T-test results (p < 0.001) and vertical jump (p = 0.04). No change was observed in both groups for plank performance (p > 0.05). The NMT promoted significant gains in motor competence and physical performance in youth female volleyball players.

DETERMINING ASYMMETRY USING SPECIFIC UNILATERAL TESTS IN YOUNG BASKETBALL PLAYERS

sportlogia ◽  
2020 ◽  
Vol 16 (1) ◽  
pp. 67-79
Author(s):  
Vedran Dukarić ◽  
◽  
Tomislav Rupčić ◽  
Li Feng ◽  
Vjekoslav Cigrovski ◽  
...  
Keyword(s):  
Young Male ◽  
Lower Extremities ◽  
Average Weight ◽  
Average Height ◽  
Basketball Players ◽  
Arm Swing ◽  
Male And Female ◽  
Explosive Power ◽  
Risk Of Injury ◽  
Training Plan

Defining the differences between the dominant (D) and non-dominant (ND) leg is one of the ways to determine the asymmetry between the extremities and thus the risk of injury. The aim of this research is to determine the differences in specific unilateral tests in young male and female basketball players. The sample consisted of 17 female basketball players (average height 177.96 ± 6.38 cm; average weight 69.53 ± 8.00 kg and age 15.50 ± 0.96 yr.) and 34 male basketball players (average height 194.29 ± 7.52 cm; average weight 83.66 ± 9.66 kg and age 15.40 ± 1.28 yr.) of the cadet and junior national teams. Tests were used to assess the explosive power of the lower extremities: high jump with D and ND leg take-off with arm swing (S_vis_jedn_L; S_vis_jedn_D), basketball two-step with D and ND leg take-off (Dvokorak_L, Dvokorak_D) and Drift protocol consisting of 5 consecutive unilateral jumps in place (Drift_L, Drift_D). The tests S_vis_jedn (p = 0.02) and Dvokorak (p = 0.03) showed statistically significant differences with an error of p˂0.05 in the group of male basketball players. Significant differences were found in female basketball players in the test S_vis_jedn (p = 0.03). In other tests, there are no significant differences between jumps with D and ND leg take-off. The presented results indicate differences between the extremities and represent the basis for the correction of the training plan and program. The methodology in this paper is simple to implement and analyse and is

scholarly journals THE EFFECTS OF PROGRAMMED TRAINING ON DEVELOPMENT OF EXPLOSIVE STRENGTH IN FEMALE VOLLEYBALL PLAYERS

2018 ◽  
Vol 15 (3) ◽  
pp. 493 ◽  
Author(s):  
Marina Veličković ◽  
Ivana Bojić ◽  
Dragana Berić
Keyword(s):  
Training Programme ◽  
Young Female ◽  
Control Group ◽  
Squat Jump ◽  
Positive Effects ◽  
Explosive Strength ◽  
Volleyball Players ◽  
The Difference ◽  
Experimental Training ◽  
Experimental Group

This study was done with the aim of determining the effects a programmed training would have on the changes in the explosive strength of young female volleyball players. The sample consisted of 30 female volleyball players, aged 14 to 16, divided into two groups – the experimental one (n=15) and the control group (n=15). The experimental group was comprised of the players from the club OK ‘Desetka’, who, apart from the basic technical and tactical training process, underwent a specially designed programme for developing explosive strength two times a week (on Tuesdays and Thursdays). The experimental programme was applied during the period of preparations before the official beginning of the regional competitions for cadets. The control group was comprised of the players from the club OK ‘Millennium’, who, during the same period of time, underwent only those training sessions which had previously been planned within the annual plan and programme of the club. Explosive strength evaluation included four sets of tests: the squat jump (SJ), countermowement jump (CMJ), drop jump (DJ), one-legged CMJ (OLCMJ). The effects of the progremmed training on the development of the explosive strength of the young female volleyball players was determined by the Covariance Analysis, ANCOVA. The results obtained in such a way showed the statistically significant improvement in the parameters tested within the experimental group. The difference was insignificant in the OLCMJ test only. The results point to the conclusion that the experimental training programme had positive effects on the changes of explosive strength of young female volleyball players.

scholarly journals Psychosocial interventions to support the mental health of informal caregivers of persons living with dementia – a systematic literature review

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Henrik Wiegelmann ◽  
Sarah Speller ◽  
Lisa-Marie Verhaert ◽  
Liane Schirra-Weirich ◽  
Karin Wolf-Ostermann
Keyword(s):  
Mental Health ◽  
Informal Caregivers ◽  
Psychosocial Interventions ◽  
Health Interventions ◽  
Subjective Burden ◽  
Dementia Caregivers ◽  
Targeted Interventions ◽  
Positive Effects ◽  
Increased Risk ◽  
Mental Health Interventions

Abstract Background Informal caregivers of persons living with dementia have an increased risk of adverse mental health effects. It is therefore important to systematically summarize published literature in order to find out which mental health interventions generate effective support for informal caregivers of persons living with dementia. The objective of this study is to conduct a systematic review of intervention content, effectiveness and subgroup differentiation of mental health interventions for informal caregivers of persons with dementia living at home. Method We searched four electronic databases (PubMed, PsychINFO, Scopus and CINAHL) and included only methodically high-quality randomized controlled trials (RCTs), published in English or German language between 2009 and 2018. The intervention programmes focused on mental health of family caregivers. A narrative synthesis of the included studies is given. Results Forty-eight publications relating to 46 intervention programmes met the inclusion criteria. Burden, depression and quality of life (QoL) are the predominant parameters that were investigated. Twenty-five of forty-six interventions (54.3%) show positive effects on at least one of the outcomes examined. Most often, positive effects are reported for the outcome subjective burden (46.2%). Only six studies explicitly target on a certain subgroup of informal dementia caregivers (13%), whereas all other interventions (87%) target the group as a whole without differentiation. Conclusion The most beneficial results were found for cognitive behavioural approaches, especially concerning the reduction of depressive symptoms. Besides this, leisure and physical activity interventions show some good results in reducing subjective caregiver burden. In order to improve effectiveness, research and practice may focus on developing more targeted interventions for special dementia informal caregiver subgroups.

scholarly journals Climate Change, Weather, Housing Precarity, and Homelessness: A Systematic Review of Reviews

2021 ◽  
Vol 18 (11) ◽  
pp. 5812
Author(s):  
Mariya Bezgrebelna ◽  
Kwame McKenzie ◽  
Samantha Wells ◽  
Arun Ravindran ◽  
Michael Kral ◽  
...  
Keyword(s):  
Climate Change ◽  
Systematic Review ◽  
Natural Disasters ◽  
Green Infrastructure ◽  
Temperature Extremes ◽  
Weather Extremes ◽  
Positive Effects ◽  
Increased Risk ◽  
Review Of Reviews ◽  
The Impact

This systematic review of reviews was conducted to examine housing precarity and homelessness in relation to climate change and weather extremes internationally. In a thematic analysis of 15 reviews (5 systematic and 10 non-systematic), the following themes emerged: risk factors for homelessness/housing precarity, temperature extremes, health concerns, structural factors, natural disasters, and housing. First, an increased risk of homelessness has been found for people who are vulnerably housed and populations in lower socio-economic positions due to energy insecurity and climate change-induced natural hazards. Second, homeless/vulnerably-housed populations are disproportionately exposed to climatic events (temperature extremes and natural disasters). Third, the physical and mental health of homeless/vulnerably-housed populations is projected to be impacted by weather extremes and climate change. Fourth, while green infrastructure may have positive effects for homeless/vulnerably-housed populations, housing remains a major concern in urban environments. Finally, structural changes must be implemented. Recommendations for addressing the impact of climate change on homelessness and housing precarity were generated, including interventions focusing on homelessness/housing precarity and reducing the effects of weather extremes, improved housing and urban planning, and further research on homelessness/housing precarity and climate change. To further enhance the impact of these initiatives, we suggest employing the Human Rights-Based Approach (HRBA).

scholarly journals Magnesium Supplementation Diminishes Peripheral Blood Lymphocyte DNA Oxidative Damage in Athletes and Sedentary Young Man

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Jelena Petrović ◽  
Dušanka Stanić ◽  
Gordana Dmitrašinović ◽  
Bosiljka Plećaš-Solarović ◽  
Svetlana Ignjatović ◽  
...  
Keyword(s):  
Dna Damage ◽  
Oxidative Damage ◽  
Peripheral Blood ◽  
Sedentary Lifestyle ◽  
Strenuous Exercise ◽  
Magnesium Supplementation ◽  
Positive Effects ◽  
Increased Risk ◽  
Rugby Players ◽  
Number Of Cells

Sedentary lifestyle is highly associated with increased risk of cardiovascular disease, obesity, and type 2 diabetes. It is known that regular physical activity has positive effects on health; however several studies have shown that acute and strenuous exercise can induce oxidative stress and lead to DNA damage. As magnesium is essential in maintaining DNA integrity, the aim of this study was to determine whether four-week-long magnesium supplementation in students with sedentary lifestyle and rugby players could prevent or diminish impairment of DNA. By using the comet assay, our study demonstrated that the number of peripheral blood lymphocytes (PBL) with basal endogenous DNA damage is significantly higher in rugby players compared to students with sedentary lifestyle. On the other hand, magnesium supplementation significantly decreased the number of cells with high DNA damage, in the presence of exogenous H2O2, in PBL from both students and rugby players, and markedly reduced the number of cells with medium DNA damage in rugby players compared to corresponding control nonsupplemented group. Accordingly, the results of our study suggest that four-week-long magnesium supplementation has marked effects in protecting the DNA from oxidative damage in both rugby players and in young men with sedentary lifestyle. Clinical trial is registered at ANZCTR Trial Id:ACTRN12615001237572.

scholarly journals Generalized joint hypermobility, scoliosis, patellofemoral pain, and physical abilities in young dancers

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Nili Steinberg ◽  
Shay Tenenbaum ◽  
Aviva Zeev ◽  
Michal Pantanowitz ◽  
Gordon Waddington ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Postural Balance ◽  
Patellofemoral Pain ◽  
Joint Hypermobility ◽  
Knee Extensors ◽  
Young Girls ◽  
Generalized Joint Hypermobility ◽  
Increased Risk ◽  
High Prevalence ◽  
Physical Abilities

Abstract Background Many young girls with generalized joint hypermobility (GJH) choose to participate in dance because their bodies are suited for this activity. Scoliosis tends to occur often in thin girls, who also are more likely to choose dance. Both anomalies (GJH and scoliosis) may be related to reduced abilities such as diminished strength and insufficient postural balance, with increased risk for musculoskeletal conditions. The main objectives of the present study were to determine the prevalence of dancers with GJH, the prevalence of dancers with scoliosis, and the prevalence of dancers with these two anomalies; and, to determine differences in physical abilities and the presence of patellofemoral pain (PFP) between young female dancers with and without such anomalies. Methods One hundred thirty-two female dancers, aged 12–14 years, were assessed for anthropometric parameters, GJH, scoliosis, knee muscle strength, postural balance, proprioception ability, and PFP. Results GJH was identified in 54 dancers (40.9%) and scoliosis in 38 dancers (28.8%). Significant differences were found in the proportion of dancers with no anomalies (74 dancers, 56.1%) and dancers with both anomalies (34 dancers, 25.8%) (p < .001). Dancers with both anomalies had reduced dynamic postural balance in the anterior direction (p = .023), reduced proprioception ability (p < .001), and weaker knee extensors (p = .036) and flexors (p = .040) compared with dancers with no anomalies. Among dancers with both anomalies, 73.5% suffered bilateral PFP, 17.6% suffered unilateral PFP, and 8.8% had no PFP (p < .001). Conclusions A high prevalence of young girls participating in dance classes had GJH, as the increased joint flexibility probably provides them with some esthetic advantages. The high prevalence of scoliosis found in these young dancers might be attributed to their relatively low body mass, their delayed maturation, and the selection process of dancers. Dancers with both GJH and scoliosis had decreased muscle strength, reduced postural balance, reduced proprioception, with higher risk of PFP. The main clinical implications are the need to reduce the risk of PFP among dancers by developing appropriate strength and stabilizing exercises combined with proprioceptive and postural balance training, to improve the correct alignment of the hyperextended and hypermobile joints, and to improve their supporting muscle strength.

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