Warm-Up With Dynamic Stretching: Positive Effects on Match-Measured Change of Direction Performance in Young Elite Volleyball Players

2020 ◽  
Vol 15 (4) ◽  
pp. 528-533
Author(s):  
Olfa Turki ◽  
Wissem Dhahbi ◽  
Johnny Padulo ◽  
Riadh Khalifa ◽  
Sana Ridène ◽  
...  
Keyword(s):  
Body Mass ◽  
Test Performance ◽  
Body Height ◽  
Performance Measurements ◽  
Fat Percentage ◽  
Warm Up ◽  
Dynamic Stretching ◽  
Change Of Direction ◽  
Positive Effects ◽  
Volleyball Players

Purpose: To explore the immediate (15-s post-warm-up) and the delayed (after 20 and 40 min of simulated volleyball play) effects of 2 different warm-up protocols—a stretching-free volleyball warm-up (NS) and a warm-up incorporating dynamic stretching (DS)—on subsequent change of direction (COD) performance in young elite volleyball players. Methods: Sixteen male players (age 16.88 [0.34] y, body mass 75.81 [5.41] kg, body height 1.91 [0.05] m, body mass index 20.84 [1.79] kg·m−2, and body fat percentage 9.48 [1.83]%) from the U-17 national volleyball team performed NS and DS on 2 different nonconsecutive days. During each testing session (NS and DS), half T-test performance measurements were performed after 5 minutes of a general warm-up (ie, baseline), immediately post-warm-up (after 15 s), and after 20 and 40 minutes of simulated volleyball play. Results: For DS, a significant improvement in COD performance (2.08%, P < .001) was observed after 20 minutes of play compared with the baseline values. In addition, COD performance recorded after 40 minutes of play was better than after 15-second post-warm-up (5.85%, P = .001). Inferential statistics showed better COD performance in the DS condition after 20 minutes of play (2.32%, likely negative, d = 0.61). Conclusions: Compared with NS, DS tended to affect the pattern of improvement of COD performance during play by intensifying and accelerating it. Consequently, to enhance COD performance for up to 40 minutes into the game, it is recommended that DS be incorporated to the warm-up preceding the match.

Dynamic Warm-Up With a Weighted Vest: Improvement of Repeated Change-of-Direction Performance in Young Male Soccer Players

2020 ◽  
Vol 15 (2) ◽  
pp. 196-203
Author(s):  
Olfa Turki ◽  
Wissem Dhahbi ◽  
Sabri Gueid ◽  
Sami Hmaied ◽  
Marouen Souaifi ◽  
...  
Keyword(s):  
Body Mass ◽  
Body Height ◽  
Soccer Players ◽  
Peak Time ◽  
Fatigue Index ◽  
Warm Up ◽  
Change Of Direction ◽  
Recovery Times ◽  
Weighted Vest ◽  
Weighted Vests

Purpose: To explore the effect of 4 different warm-up strategies using weighted vests and to determine the specific optimal recovery duration required to optimize the repeated change-of-direction (RCOD) performance in young soccer players. Methods: A total of 19 male soccer players (age 18 [0.88] y, body mass 69.85 [7.68] kg, body height 1.75 [0.07] m, body mass index 22.87 [2.23] kg·m−2, and body fat percentage 12.53% [2.59%]) completed the following loaded warm-up protocols in a randomized, counterbalanced cross-over, within-participants order and on separate days: weighted vest with a loading of 5% (WUV5%), 10% (WUV10%), 15% (WUV15%) body mass, and an unloaded condition (control). RCOD performance (total time, peak time, and fatigue index) was collected during the preintervention phase (5 min after the dynamic stretching sequence) for baseline values and immediately (at 15 min), at 4- and 8-minute postwarm-up intervention. Results: For each postwarm-up tested, recovery times (ie, 15 s, 4 min, and 8 min), of both total and peak times were faster following WUV5%, WUV10%, and WUV15%, compared with the unloaded condition (P ≤.001–.031, d = 1.28–2.31 [large]). There were no significant differences (P = .09–1.00, d = 0.03–0.72 [trivial–moderate]) in-between recovery times in both total and peak times following WUV5%, WUV10%, and WUV15%. However, baseline fatigue index score was significantly worse than all other scores (P ≤.001–.002, d = 1.35–2.46 [large]) following the loaded conditions. Conclusions: The findings demonstrated that a dynamic loaded warm-up increases an athlete’s initial RCOD performance up to the 8-minute postwarm-up intervention. Therefore, strength coaches need to consider using weighted vests during the warm-up for trained athletes in order to acutely optimize RCODs.

scholarly journals Acute Effect of Different Combined Stretching Methods on Acceleration and Speed in Soccer Players

2016 ◽  
Vol 50 (1) ◽  
pp. 179-186 ◽  
Author(s):  
Mohammadtaghi Amiri-Khorasani ◽  
Julio Calleja-Gonzalez ◽  
Mansooreh Mogharabi-Manzari
Keyword(s):  
Body Mass ◽  
Body Height ◽  
Acute Effect ◽  
Soccer Players ◽  
Warm Up ◽  
Dynamic Stretching ◽  
Rest Periods

AbstractThe purpose of this study was to investigate the acute effect of different stretching methods, during a warm-up, on the acceleration and speed of soccer players. The acceleration performance of 20 collegiate soccer players (body height: 177.25 ± 5.31 cm; body mass: 65.10 ± 5.62 kg; age: 16.85 ± 0.87 years; BMI: 20.70 ± 5.54; experience: 8.46 ± 1.49 years) was evaluated after different warm-up procedures, using 10 and 20 m tests. Subjects performed five types of a warm-up: static, dynamic, combined static + dynamic, combined dynamic + static, and no-stretching. Subjects were divided into five groups. Each group performed five different warm-up protocols in five non-consecutive days. The warm-up protocol used for each group was randomly assigned. The protocols consisted of 4 min jogging, a 1 min stretching program (except for the no-stretching protocol), and 2 min rest periods, followed by the 10 and 20 m sprint test, on the same day. The current findings showed significant differences in the 10 and 20 m tests after dynamic stretching compared with static, combined, and no-stretching protocols. There were also significant differences between the combined stretching compared with static and no-stretching protocols. We concluded that soccer players performed better with respect to acceleration and speed, after dynamic and combined stretching, as they were able to produce more force for a faster execution.

scholarly journals Determining strength training needs using the force-velocity profile of elite female handball and volleyball players

2020 ◽  
pp. 174795412096404
Author(s):  
Leonidas Petridis ◽  
Gergely Pálinkás ◽  
Zsófia Tróznai ◽  
Bettina Béres ◽  
Katinka Utczás
Keyword(s):  
Velocity Profile ◽  
Strength Training ◽  
Body Mass ◽  
Female Athletes ◽  
Vertical Jump ◽  
Body Height ◽  
Maximum Velocity ◽  
Total Force ◽  
Volleyball Players ◽  
Force Velocity

The aim of this study was to assess the vertical jump performance and the force-velocity profile of elite female handball and volleyball players. Forty-one female athletes were measured, 28 handball players (age: 24.0 ± 3.6 years, body height: 1.75 ± 0.05 m, body mass: 69.0 ± 7.3 kg) and 13 volleyball players (age: 24.1 ± 5.2 years, body height: 1.83 ± 0.07 m and body mass: 74.9 ± 7.9 kg). All players performed unloaded and loaded countermovement jumps (CMJ) on a force platform. The theoretical maximal force ( F0), the theoretical maximum velocity ( v0), the theoretical maximal power ( Pmax), the slope of the F-v relationship ( Sfv) and the force-velocity imbalance ( FVimb) were calculated. Mean value of vertical jump height was 0.33 ± 0.03m, with no difference between handball and volleyball players. Mean values of F0, v0, Pmax, Sfv and FVimb for all players were 31.2 ± 2.6 N/kg, 3.10 ± 0.50 m·s−1, 24.2 ± 3.2 w/kg, -10.32 ± 2.09 Ns/m/kg and 28.1 ± 13.3% respectively. Two players had a low magnitude velocity-deficit, whereas most of the players exhibited a low to high force-deficit. A strong correlation was found between the ratio of measured to optimal F-v slope with the change in the proportion of net force to total force during unloaded and loaded conditions. The findings suggest that it would be beneficial for these athletes to first decrease their force deficit through mainly maximal strength training before implementing training to further maximize power output. Establishment of the F-v profile could be a useful diagnostic tool for coaches to optimize strength training and to design training intervention based on the individual need of each athlete.

scholarly journals Importance of Agility Performance in Professional Futsal Players; Reliability and Applicability of Newly Developed Testing Protocols

2019 ◽  
Vol 16 (18) ◽  
pp. 3246 ◽  
Author(s):  
Damir Sekulic ◽  
Nikola Foretic ◽  
Barbara Gilic ◽  
Michael R. Esco ◽  
Raouf Hammami ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Body Mass ◽  
Body Height ◽  
T Test ◽  
Effect Sizes ◽  
Change Of Direction ◽  
Reactive Agility ◽  
Testing Protocols ◽  
Level Group ◽  
Dominant Side

The purpose of this study was to determine the inter- and intra-testing reliability of newly developed tests of the change of direction speed (CODS) and reactive agility (RAG) in competitive futsal players. Additionally, the developed tests were evaluated for their validity with regard to the differentiation of two performance-levels. Thirty-two professional male futsal players (age = 26.22 ± 5.22 years; body height = 182.13 ± 5.99 cm, body mass = 77.43 ± 8.00 kg) participated in the study. The sample was divided into two groups based on their level of futsal performance: A top-level-group (n = 12) and a team-level-group (n = 20). The variables included body height, mass, body mass index, a sprint over a 10-m distance (S10M), and eight newly developed futsal specific CODS and RAG tests. The CODS and RAG tests were performed by dribbling the balls (CODS_D and RAG_D) and without dribbling (CODS_T and RAG_T), and the performances on the dominant and non-dominant sides were observed separately. All CODS, and RAG tests performed on dominant side and RAG_T tests performed on the non-dominant side had good inter-testing (CV = 5–8%; ICC = 0.76–0.89) and intra-testing (CV = 4–9%; ICC = 0.77–0.91) reliability. However, RAG_D performed on the non-dominant side was not reliable (ICC = 0.60, CV = 10%). The top-level-players outperformed the team-level-players in the CODS and RAG tests that involved dribbling (t-test: 4.28 and 2.40, p < 0.05; effect sizes (ES): 0.81 and 1.5, respectively), while the team-level players achieved better results in the CODS_T (t-test: 2.08, p < 0.05; ES: 0.60). The proposed CODS and RAG tests that involved dribbling over a 3.2-m distance, especially on the dominant side, appeared to be reliable, as well as valid for distinguishing the performance level in futsal players.

scholarly journals The Relationship Between Body Mass Index with Body Fat Percentage of Participants EXPO 2021 Universitas Teuku Umar

2021 ◽  
Vol 2 (1) ◽  
pp. 19
Author(s):  
Suci Eka Putri ◽  
Adelina Irmayani Lubis
Keyword(s):  
Body Mass Index ◽  
Body Weight ◽  
Nutritional Status ◽  
Body Mass ◽  
Body Fat ◽  
Body Height ◽  
The Body ◽  
Body Fat Percentage ◽  
Fat Percentage ◽  
The Relationship

Body mass index (BMI) is to monitor nutritional status adults, especially those related to deficiency and overweight. Body fat percentage can describe the risk of degenerative diseases.This study was conducted to measure the relationship between BMI and body fat percentage. Methods An analytical study was conducted to 41 male and 51 female participant from Universitas Teuku Umar. The body weight was measured using scales, whereas the body height was measured using microtoise. The body fat percentage was measured using Karada Scan. The BMI was calculated by dividing the body weight in kilogram divided by body height in meter square. Data was collected from 16-18th February 2021 and analyzed by Pearson’s correlation test. The results showed BMI underweight, normal, and overweight were 10,9, 57,6, and 31,5. High body fat percentage in men were 75,6% and in women were 35,5%. There is a relationship between the nutritional status of the women group and the body fat percentage with p-value is obtained = 0.021. Furthermore, for men, there is no relationship between nutritional status in the men group and the body fat percentage. There is a relationship between nutritional status and body fat percentage in women. Among this population, BMI can still be used to determine body fat percentage

Body Physique and Composition in Premenarchal Ballerinas and Female Athletes in Aesthetic Sports

2005 ◽  
Vol 20 (4) ◽  
pp. 175-179
Author(s):  
Marjeta Misigoj-Durakovic ◽  
Vlatko Vucetic ◽  
Zijad Durakovic ◽  
Jasenka Wolf-Cvitak ◽  
Branka Matkovic ◽  
...  
Keyword(s):  
Body Mass ◽  
Soft Tissues ◽  
Female Athletes ◽  
Body Height ◽  
Skinfold Thickness ◽  
Figure Skating ◽  
Fat Percentage ◽  
Figure Skaters ◽  
Rhythmic Gymnastics ◽  
Rhythmic Gymnasts

Ballet, rhythmic gymnastics, and figure skating are disciplines that are begun early in childhood and pose high demands on the performers’ functional and energy capacities, which may influence the development of the body's physique and composition. This study investigated whether differences in the body's physique and composition were preexistent in young, premenarchal ballerinas and female athletes in aesthetic sport disciplines before training was started. Twenty-four anthropometric measurements were made of body physique and composition, and body mass index (BMI) and fat percentage were calculated. The groups of premenarchal dancers and athletes did not differ significantly in body height, body mass, or BMI. They also showed similarities in skeletal measurements, with the exception of ankle diameter. In measurements sensitive to specific training loads, significant differences were found, most notably in figure skaters, who had markedly greater arm circumferences than did ballerinas and rhythmic gymnasts. Ballerinas and rhythmic gymnasts did not have significant differences in soft tissues measurements, with the exception of the calf skinfold thickness, which was significantly greater in ballerinas. Skinfold thickness and body fat percentage were higher in skaters than in rhythmic gymnasts and ballerinas. Young ballerinas and rhythmic gymnasts were more slender with lower skinfold values and limb circumferences than skaters.

scholarly journals Effects of Different Post-Activation Potentiation Warm-Ups on Repeated Sprint Ability in Soccer Players from Different Competitive Levels

2018 ◽  
Vol 61 (1) ◽  
pp. 189-197 ◽  
Author(s):  
Javier Sanchez-Sanchez ◽  
Alejandro Rodriguez ◽  
Cristina Petisco ◽  
Rodrigo Ramirez-Campillo ◽  
Cristian Martínez ◽  
...  
Keyword(s):  
Body Mass ◽  
High Speed ◽  
Body Height ◽  
Soccer Players ◽  
Meaningful Improvement ◽  
Warm Up ◽  
Performance Improvements ◽  
Repeated Sprint Ability ◽  
Repeated Sprint ◽  
Sprint Ability

Abstract This study aimed to compare the effects of a traditional warm-up with two post-activation potentiation (PAP) warm-up strategies on the repeated sprint ability (RSA) of soccer players from national (NL) and regional (RL) competitive levels. Sixteen young players (NL, n = 8, age = 20.7 ± 1.4 y, body mass = 68.5 ± 7.0 kg, body height = 177.4 ± 5.2 cm; RL, n = 8, age = 20.8 ± 1.0 y, body mass = 68.7 ± 4.0 kg, body height = 176.6 ± 5.6 cm) were recruited to complete a traditional warm-up (CONTROL), a PAP warm-up incorporating squats with a load (~60% 1RM) that allowed a high speed (1 m/s) of movement and a high number of repetitions (PAP-1), and a PAP warm-up with a load (~90% 1RM) that allowed a moderate speed (0.5 m/s) of movement and a reduced number of repetitions (PAP-0.5). A RSA test (six 20-m sprints with 20 s of recovery) was performed 5 min after the PAP warm-up to assess the effects of the different protocols on the fastest sprint (RSAb) and the mean time of all sprints (RSAm). A meaningful improvement of RSA performance was observed with PAP-0.5, attaining a large effect on NL (RSAb, ES = -1.5; RSAm, ES = -1.3) and only a small effect on RL athletes (RSAb and RSAm, ES = -0.2). Moreover, when each RSA sprint performance was compared between NL and RL players, after PAP-0.5 greater performance for all sprints was observed in the NL players. Therefore, adding a heavy strength-based conditioning exercise during the warm-up prior to a RSA test may induce significant performance improvements in NL, but only small effects in RL players.

Assessment of pain and joint instability after ankle sprain in volleyball players

2020 ◽  
Vol XXIII (4) ◽  
pp. 31-43
Author(s):  
Anna SZCZERBA ◽  
Grzegorz MAGOŃ
Keyword(s):  
Ankle Sprain ◽  
Joint Instability ◽  
Competitive Sports ◽  
Joint Mobility ◽  
Functional Tests ◽  
Uneven Surface ◽  
Warm Up ◽  
Change Of Direction ◽  
Volleyball Players ◽  
Comparative Group

Introduction. Ankle sprain is a very common injury in competitive sports, recreation and also in everyday life. The main cause of torsion is inversion trauma, which most often occurs when tripping over an uneven surface, or as in the case of retina when landing after a jump / block attack or quick change of direction. Goal. Assessment of pain, joint instability and fear of returning to play after ankle sprain in volleyball players. Material and method. The study included a group of 51 women aged 16 to 35, consisting of volleyball players and a comparative group of healthy women who did not exercise. The study was carried out using the author's questionnaire, ankle joint mobility was measured, joint pain was assessed using the VAS scale and functional tests were performed. Results. More than half of volleyball players feel problems with a twisted joint during warm-up. Some of the respondents are also afraid to play 100% during block / capture for fear of another twist. The study showed that ankle sprain partially affected the players' involvement in training and warm-up. Rehabilitation usually lasted up to 2 weeks and in almost half of the volleyball players it was not completed before returning to training, thus not allowing you to return to full fitness after injury.

Predicting futsal specific change of direction speed and reactive agility; analysis of specific correlates in top-level players

2020 ◽  
Author(s):  
Ivan Zeljko ◽  
Miodrag Spasic ◽  
Damir Sekulic
Keyword(s):  
Body Mass ◽  
Predictive Validity ◽  
Body Height ◽  
Negative Influence ◽  
Strength Index ◽  
Advanced Level ◽  
Change Of Direction ◽  
Reactive Agility ◽  
National Champions ◽  
Specific Influence

Purpose: Change of direction speed (CODS) and reactive agility (RAG) are important qual-ities in futsal, but studies rarely examined the predictors of these conditioning capacities in players of advanced level. This study aimed to evaluate predictive validity of certain an-thropometric and conditioning capacities in evaluation of futsal specific CODS and RAG in top-level players. Methods: The sample comprised 54 male players from Croatia and Bosnia and Herzegovina, members of teams competing at the highest national rank, including national champions for the 2017–2018 competitive season in both countries. The variables comprised set of pre-dictors (body mass, body height, triceps skinfold, reactive strength index [RSI], sprint 10 m [S10M], and broad jump [BJ]; and four criteria: futsal specific CODS and RAG, performed with and without dribbling (CODS_D, CODS_WD, RAG_D, RAG_WD). To identify the asso-ciation between variables Pearson’s correlation and multiple regressions were calculated. Results: Observed predictors explained statistically significant (p < 0.05) percentage of vari-ance for all four criteria (Rsq: 0.28, 0.30, 0.23 and 0.25, for CODS_WD, CODS_D, RAG_WD, RAG_D, respectively). Body mass was significant predictor for all criteria (Beta: 0.35–0.51), with poorer performances in heavier players. In both performances which involved dribbling, significant predictors was RSI (Beta: −0.27 and −0.31 for CODS_D and RAG_D, respective-ly), with superior performances in players with better RSI. The S10M and BJ were not identi-fied as being significantly correlated to studied RAG and CODS performances. Conclusion: Study confirmed specific influence of studied predictors of futsal specific CODS and RAG with consistent negative influence of body mass on studied performances. Almost certainly this can be explained by specifics of RAG and CODS execution. Specifically, tests are performed over relatively small distances, with several changes of direction, which clear-ly mimic the futsal specific performances. Although sprint performance is often observed as important determinant of CODS and RAG, herein we did not confirm its predictive validity in explanation of futsal specific CODS and RAG. Future studies should evaluate other poten-tially important predictors of these capacities in futsal.

scholarly journals Mechanical Analysis of the Acute Effects of a Heavy Resistance Exercise Warm-Up on Agility Performance in Court-Sport Athletes

2013 ◽  
Vol 39 (1) ◽  
pp. 147-156 ◽  
Author(s):  
Christopher J. Sole ◽  
Gavin L. Moir ◽  
Shala E. Davis ◽  
Chad A. Witmer
Keyword(s):  
Resistance Exercise ◽  
Body Mass ◽  
Reaction Force ◽  
Body Height ◽  
Stride Frequency ◽  
Camera Motion ◽  
Acute Effects ◽  
Training Experience ◽  
Warm Up ◽  
Heavy Resistance Exercise

Abstract The purpose of this study was to determine the acute effects of heavy resistance exercise on agility performance in court-sport athletes. Five men (age: 20.6 ± 1.9 years; body mass: 79.36 ± 11.74 kg; body height: 1.93 ± 0.09 m) and five women (age 21.2 ± 2.7 years; body mass: 65.8 ± 10.18 kg; body height 1.77 ± 0.08 m) volunteered to participate in the present study. All subjects were NCAA Division II athletes who currently participated in tennis or basketball and all had previous resistance training experience of at least one year. In a counterbalanced design, agility performance during a 10 m shuttle test was assessed following either a dynamic warm-up (DW) or heavy resistance warm-up (HRW) protocol. The HRW protocol consisted of three sets of squats at 50, 60, and 90% of 1-RM. Agility performance was captured using an eight camera motion analysis system and the mechanical variables of stride length, stride frequency, stance time, flight time, average ground reaction force, as well as agility time were recorded. No significant differences were reported for the HRW and DW protocols for any of the mechanical variables (p>0.05), although there was a trend towards the HRW protocol producing faster agility times compared to the control protocol (p = 0.074). Based on the trend towards a significant effect, as well as individual results it is possible that HRW protocols could be used as an acute method to improve agility performance in some court-sport athletes.

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