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Pagaduan, J., Schoenfeld, B. J. & Pojskic, H. (2019). Systematic review and meta-analysis on the effect of contrast training on vertical jump performance. Strength and conditioning journal, 41(3), 63-78
Open this publication in new window or tab >>Systematic review and meta-analysis on the effect of contrast training on vertical jump performance
2019 (English)In: Strength and conditioning journal, ISSN 1524-1602, E-ISSN 1533-4295, Vol. 41, no 3, p. 63-78Article, review/survey (Refereed) Published
Abstract [en]

The purpose of this article was to perform a systematic review and meta-analysis on the effect of contrast training (CT) On vertical jump performance. Thirteen of 83 studies were included for systematic review, whereas 10 studies were used for meta-analysis. Meta-analysis revealed greater countermovement jump (CMJ) gains in CT than in resistance training (RT) (Effect Size [ES] = 1.30; confidence interval [CI] = 0.31-2.30). Similarly, CT displayed higher CMJ than control (ES = 1.46; CI = 0.46-2.46). In conclusion, CT showed greater improvement in CMJ compared with RT and CON. For a video abstract of this article, see video, supplemental digital content 1, Http://LINKS.LWW.COM/SCJ/A247. 

Keywords
combined training, complex training, contrast training, plyometric training, resistance training, vertical jump
National Category
Sport and Fitness Sciences
Identifiers
urn:nbn:se:miun:diva-36904 (URN)10.1519/SSC.0000000000000442 (DOI)000480695500006 ()2-s2.0-85070304934 (Scopus ID)
Available from: 2019-08-20 Created: 2019-08-20 Last updated: 2019-09-02Bibliographically approved
Zubak, Z., Zenic, N., Ostojic, L., Zubak, I. & Pojskic, H. (2018). A Prospective Study on the Influence of Scholastic Factors on the Prevalence and Initiation of Illicit Drug Misuse in Adolescence. International Journal of Environmental Research and Public Health, 15(5), Article ID 874.
Open this publication in new window or tab >>A Prospective Study on the Influence of Scholastic Factors on the Prevalence and Initiation of Illicit Drug Misuse in Adolescence
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2018 (English)In: International Journal of Environmental Research and Public Health, ISSN 1661-7827, E-ISSN 1660-4601, Vol. 15, no 5, article id 874Article in journal (Refereed) Published
Abstract [en]

Background: This study aimed to prospectively investigate the scholastic factors related to illicit drug misuse (IDM) and the initiation of IDM among older adolescents from Bosnia andHerzegovina. Methods: This 2-year prospective study included 436 participants (202 females), who were an average of 16 years old at the beginning of the study (baseline). The participants were tested at baseline and follow-up (20 months later). The predictors included variables of scholastic-achievement (grade point average, school absences, unexcused absences and behavioral grade). The criteria were: (i) IDM at baseline; (ii) IDM at follow-up; and (iii) initiation of IDM over the study course. Results: Logistic regression indicated increased odds of IDM in adolescents who were more frequent absent from school (baseline: Odds Ratio (OR): 3.73, 95% Confidence Interval (CI): 2.12–6.57; follow-up: OR: 2.91, 95% CI: 1.90–4.65). The lower grade point average and more unexcused absences were evidenced for adolescents who consumed drugs on follow-up(OR: 1.67, 95% CI: 1.11–2.51; OR: 1.74, 95% CI: 1.30–2.32 for grade point average and unexcused absences, respectively). Initiation of IDM was predicted by frequent absences from school (OR: 2.2,95% CI: 1.3–3.8), and lower behavioral grades (OR: 1.9, 95% CI: 1.2–3.3). Conclusions: The findings confirmed strong correlations between scholastic failure and IDM. Absences from school and lower behavioral grades at baseline were predictive of the initiation of IDM in older adolescents.

Place, publisher, year, edition, pages
MDPI, 2018
Keywords
substance misuse, academic achievement, puberty, association
National Category
Health Sciences
Identifiers
urn:nbn:se:miun:diva-33551 (URN)10.3390/ijerph15050874 (DOI)000435197300042 ()29702611 (PubMedID)2-s2.0-85046132057 (Scopus ID)
Available from: 2018-05-02 Created: 2018-05-02 Last updated: 2018-08-10Bibliographically approved
Zubak, Z., Terzic, A., Zenic, N., Ostojic, L., Zubak, I., Jelicic, M. & Pojskic, H. (2018). Are Sports-Related Factors Correlated to the Prevalence and Initiation of Illicit Drug Misuse in Adolescence?: Prospective Study in Older Adolescents. BioMed Research International, Article ID 1236284.
Open this publication in new window or tab >>Are Sports-Related Factors Correlated to the Prevalence and Initiation of Illicit Drug Misuse in Adolescence?: Prospective Study in Older Adolescents
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2018 (English)In: BioMed Research International, ISSN 2314-6133, E-ISSN 2314-6141, article id 1236284Article in journal (Refereed) Published
Abstract [en]

Sport participation is considered as a factor of potential influence on illicit drugmisuse (IDM) in adolescence, but there is an evident lack of studies which prospectively investigated this problem. This study aimed to prospectively investigate the sports-related factors related to IDM and the initiation of IDM among older adolescents. The participants were 436 adolescents (202 females; 16 years old at study baseline). They were tested at baseline and follow-up (two years later). The predictors included variables associated with different facets of sports participation and success in sports. The criteria were (i) baseline IDM, (ii) follow-up IDM, and (iii) initiation of IDM between baseline and follow-up. Crude and adjusted (controlled for parental conflict, age, socioeconomic status, and gender) logistic regressions were applied to establish correlations between predictors and criteria. There were higher odds for baseline IDM in adolescents who quit individual sports (OR: 4.2, 95% CI: 1.3-13.9), who had better competitive sports achievements (OR: 1.8, 95% CI: 1.0-3.3), and those involved in sports for a longer time (OR: 1.6, 95% CI: 1.0-2.5). The IDM at follow-up was more prevalent in adolescents who were involved in sports for a longer time (OR: 1.7, 95% CI: 1.1-2.6). Initiation of drug use was predicted by longer experience in sports (OR: 1.8, 95% CI: 1.1-3.1). Sports-related factors were more negatively than positively related to illicit drug use. Most probably, the transition from junior to senior level in sports put specific stress on those adolescents who were highly committed to sports until that time, but who then had to question their own sports abilities and future potential in sports. Sport-authorities should be informed on established results and specific public-health efforts aimed at preventing IDM in athletic adolescents are urgently needed.

National Category
Health Sciences
Identifiers
urn:nbn:se:miun:diva-35396 (URN)10.1155/2018/1236284 (DOI)000452960200001 ()2-s2.0-85058633068 (Scopus ID)
Available from: 2019-01-08 Created: 2019-01-08 Last updated: 2019-01-08Bibliographically approved
Pojskic, H., Sisic, N., Separovic, V. & Sekulic, D. (2018). Association between conditioning capacities and shooting performance in professional basketball players; an analysis of stationary and dynamic shooting skills: Predictors of shooting performance in basketball. Journal of Strength and Conditioning Research, 32(7), 1981-1992
Open this publication in new window or tab >>Association between conditioning capacities and shooting performance in professional basketball players; an analysis of stationary and dynamic shooting skills: Predictors of shooting performance in basketball
2018 (English)In: Journal of Strength and Conditioning Research, ISSN 1064-8011, E-ISSN 1533-4287, Vol. 32, no 7, p. 1981-1992Article in journal (Refereed) Published
Abstract [en]

Little is known about the influence of conditioning capacities on shooting performance in basketball. The aim of this study was to examine the relationship between different conditioning capacities and shooting performance in professional basketball players. In this investigation, we examined 38 males (all perimeter players; height: 185.5+/-6.73 cm; mass: 78.66+/-10.35 kg). Conditioning capacities were evaluated by tests of muscular-strength, aerobic-endurance, jumping- and throwing-capacities, sprinting-speed, pre-planned-agility, anaerobic-endurance and fatigue-resistance. Shooting performance was evaluated using game statistics, as well as six tests of shooting-performance performed in controlled settings: (i) three tests of static (i.e., non-fatigued) shooting-performance (standardized execution of one- (S1), two- (S2) and three-point shots (S3) in stationary conditions), and (ii) three tests of dynamic (i.e., fatigued) shooting-performance (standardized execution of one- (D1), two- (D2), and three-point shots (D3) in dynamic conditions). All three dynamic shooting tests and the S1 test were significantly (p<0.05) correlated with corresponding game statistics. Multiple regression indicated that conditioning capacities were significantly related to D1 (R2=0.36; p=0.03), D2 (R2=0.44; p=0.03), S3 (R2=0.41; p=0.02) and D3 (R2=0.39; p=0.03) tests. Players with a higher fatigue-resistance achieved better results on D1 test ([beta]=-0.37, p=0.03). Pre-planned-agility ([beta]=-0.33, p=0.04), countermovement jump ([beta]=0.42, p=0.03) and fatigue-resistance ([beta]=-0.37, p=0.02) were significant predictors of D2 performance. The countermovement jump ([beta]=0.39, p=0.04), medicine ball toss ([beta]=0.34, p=0.04) and anaerobic-endurance ([beta]=0.46, p=0.04) predicted the results of D3 performance. Jumping, throwing and anaerobic endurance capacities were good determinants of the skill of dynamic shooting over a long distance. These findings emphasize the importance of explosive power and anaerobic-capacity as determinants of shooting-performance in high-level basketball players.

Keywords
accuracy, fatigue, speed, agility, anaerobic capacity
National Category
Sport and Fitness Sciences
Identifiers
urn:nbn:se:miun:diva-31312 (URN)10.1519/JSC.0000000000002100 (DOI)000440886300025 ()29939949 (PubMedID)2-s2.0-85045321217 (Scopus ID)
Available from: 2017-08-02 Created: 2017-08-02 Last updated: 2019-03-26Bibliographically approved
Pojskic, H., Erik, Å., Krolo, A., Jukic, I., Uljevic, O., Spasic, M. & Sekulic, D. (2018). Importance of Reactive Agility and Change of Direction Speed in Differentiating Performance Levels in Junior Soccer Players: Reliability and Validity of Newly Developed Soccer-Specific Tests. Frontiers in Physiology, 9(MAY), Article ID 506.
Open this publication in new window or tab >>Importance of Reactive Agility and Change of Direction Speed in Differentiating Performance Levels in Junior Soccer Players: Reliability and Validity of Newly Developed Soccer-Specific Tests
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2018 (English)In: Frontiers in Physiology, ISSN 1664-042X, E-ISSN 1664-042X, Vol. 9, no MAY, article id 506Article in journal (Refereed) Published
Abstract [en]

Agility is a significant determinant of success in soccer; however, studies have rarely presented and evaluated soccer-specific tests of reactive agility (S_RAG) and non-reactive agility (change of direction speed – S_CODS) or their applicability in this sport. The aim of this study was to define the reliability and validity of newly developed tests of the S_RAG and S_CODS to discriminate between the performance levels of junior soccer players. The study consisted of 20 players who were involved at the highest national competitive rank (all males; age: 17.0 0.9 years), divided into three playing positions (defenders, midfielders, and forwards) and two performance levels(U17 and U19). Variables included body mass (BM), body height, body fat percentage,20-m sprint, squat jump, countermovement jump, reactive-strength-index, unilateral jump, 1RM-back-squat, S_CODS, and three protocols of S_RAG. The reliabilities of theS_RAG and S_CODS were appropriate to high (ICC: 0.70 to 0.92), with the strongest reliability evidenced for the S_CODS. The S_CODS and S_RAG shared 25–40% of the common variance. Playing positions significantly differed in BM (large effect-size differences [ES]; midfielders were lightest) and 1RM-back-squat (large ES; lowest results in midfielders). The performance levels significantly differed in age and experience in soccer; U19 achieved better results in the S_CODS (t-test: 3.61, p < 0.05, large ES)and two S_RAG protocols (t-test: 2.14 and 2.41, p < 0.05, moderate ES). Newly developed tests of soccer-specific agility are applicable to differentiate U17 and U19players. Coaches who work with young soccer athletes should be informed that the development of soccer-specific CODS and RAG in this age is mostly dependent on training of the specific motor proficiency.

Place, publisher, year, edition, pages
Frontiers Media S.A., 2018
Keywords
football, pre-planned agility, non-planned agility, conditioning capacities, team sports
National Category
Sport and Fitness Sciences
Identifiers
urn:nbn:se:miun:diva-33619 (URN)10.3389/fphys.2018.00506 (DOI)000432407300001 ()29867552 (PubMedID)2-s2.0-85047011594 (Scopus ID)
Available from: 2018-05-15 Created: 2018-05-15 Last updated: 2018-07-04Bibliographically approved
Pojskic, H. & Eslami, B. (2018). Relationship Between Obesity, Physical Activity, and Cardiorespiratory Fitness Levels in Children and Adolescents in Bosnia and Herzegovina: An Analysis of Gender Differences. Frontiers in Physiology, 9, Article ID 1734.
Open this publication in new window or tab >>Relationship Between Obesity, Physical Activity, and Cardiorespiratory Fitness Levels in Children and Adolescents in Bosnia and Herzegovina: An Analysis of Gender Differences
2018 (English)In: Frontiers in Physiology, ISSN 1664-042X, E-ISSN 1664-042X, Vol. 9, article id 1734Article in journal (Refereed) Published
Abstract [en]

This study aimed to examine: (i) the level of physical activity (PA), obesity indices and cardiorespiratory fitness (CRF) among boys and girls in primary school, and (ii) to determine the association of obesity indices and PA with CRF for the total number of participants, and then separately for boys and girls. 753 sixth to ninth grade girls and boys aged 10-14 years took part in this cross-sectional study. The PA was assessed by the "Physical Activity Questionnaire - Children" and CRF was assessed by the Maximal multistage a 20 m shuttle run test. Body mass index (BMI), waist circumferences (WC), and waist to height ratio (WHtR) were considered as obesity indices. Multiple linear regression analyses were performed to explore correlates of CRF. The results obtained showed the prevalence of general overweight and obesity was 25.5% in our sample which was lower than that in the regional estimate (e.g., similar to 28%) for Eastern Europe. Among all participants, CRF was associated with male sex, older age, a lower WC percentile, higher WHtR, and higher level of PA. The model accounted for 24% of the variance. CRF was associated with older age and higher level of PA among girls and boys. Lower WC percentile was a significant determinant of CRF among boys. In conclusion, general overweight/obesity was not independently associated with CRF. Those with better CRF were more likely to be male and older, had a higher level of PA and lower central adiposity. These findings emphasize the importance of supporting school age children to take a part in programmed physical activity regardless of their body composition.

Keywords
BMI, overweight, shuttle run test, VO2max, waist circumference
National Category
Health Sciences
Identifiers
urn:nbn:se:miun:diva-35391 (URN)10.3389/fphys.2018.01734 (DOI)000451675900001 ()30546322 (PubMedID)
Available from: 2019-01-08 Created: 2019-01-08 Last updated: 2019-01-08Bibliographically approved
Uljevic, O., Pehar, M., Pojskic, H., Spasic, M. & Sekulic, D. (2017). A Total Sample Vs. Playing-Position Approach To Identifying Relationships Between Different Agility Components In Basketball. In: 11th International Conference on Kinanthropology: Sport and Quality of Life. Paper presented at 11th International Conference on Kinanthropology, Brno, Czech Republic, 29.11 – 1.12. 2017 (pp. 55). Brno, Czech Republic, 11
Open this publication in new window or tab >>A Total Sample Vs. Playing-Position Approach To Identifying Relationships Between Different Agility Components In Basketball
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2017 (English)In: 11th International Conference on Kinanthropology: Sport and Quality of Life, Brno, Czech Republic, 2017, Vol. 11, p. 55-Conference paper, Published paper (Refereed)
Abstract [en]

Purpose: Non-planned agility (reactive agility - RAG), and pre-planned agility (change of direction speed- CODS) are important determinants of success in basketball. However, the association between these two conditioning capacities in high-level basketball players is rarely evidenced. The aim of this investigation was to evaluate the relationship between basketball-specific CODS and RAG in the total sample, and separately for three main playing positions in the game of basketball (i.e. guards, forwards and centers).

Methods: The sample comprised 106 national/international-level male basketball players (age:21.9±3.5 years; body height: 195.1±7.9 cm; body mass: 90.1±10.0 kg), divided according to their playing positions in game (guards, N = 49; forwards, N = 22; centers, N = 35). The variables included body mass, body height, and body fat percentage; as well as basketball-specific CODS and -RAG. The reliability of CODS and RAG was evidenced by intra-class-coefficients (ICC). Differences among positions were established by one-way analysis of variance, consecutive post-hoc analyses, and effect size differences (η2). Finally, the relationship between variables was established by means of Pearson’s moment correlation coefficient (r), which was calculated for the total sample, and then separately for each playing position.

Results: The intra-session reliability was somewhat higher for CODS, than for RAG (ICC: 0.81 and 0.76, respectively). The centers were tallest (F: 67.75, p < 0.01; η2: 0. 57), and heaviest (F: 39.01, p < 0.01,η2: 0.44), followed by forwards. The guards and forwards achieved better results than centers in CODS(F: 5.19, p < 0.01; η2: 0.09), and RAG (F: 3.85, p < 0.05; E η2: 0.07). When observed for the total sample, the CODS and RAG shared 49% of common variance (r: 0.70). When calculated for playing positions, the highest correlation between CODS and RAG was evidenced for centers (r: 0.81), then for forwards(r: 0.71), and guards (r: 0.51).

Conclusion: Relatively strong correlations between CODS and RAG among forwards and centers implies the possibility of simultaneous strength and conditioning of these capacities for these two playing positions. Meanwhile, because of the small common variance, separate training for RAG and CODS is warranted for guards. The study highlights the necessity of a position-specific approach to evidencing determinants of sport-specific conditioning qualities for high-level players.

Place, publisher, year, edition, pages
Brno, Czech Republic: , 2017
Keywords
pre-planned agility, non-planned agility, team sports, sport-specific test
National Category
Sport and Fitness Sciences
Identifiers
urn:nbn:se:miun:diva-32210 (URN)000467203700039 ()978-80-210-8816-0 (ISBN)
Conference
11th International Conference on Kinanthropology, Brno, Czech Republic, 29.11 – 1.12. 2017
Available from: 2017-12-03 Created: 2017-12-03 Last updated: 2019-06-03Bibliographically approved
Sekulic, D., Sisic, N., Terzic, A., Jasarevic, I., Ostojic, L., Pojskic, H. & Zenic, N. (2017). Sport and scholastic factors in relation to smoking and smoking initiation in older adolescents: a prospective cohort study in Bosnia and Herzegovina. BMJ Open, 7(3), Article ID e014066.
Open this publication in new window or tab >>Sport and scholastic factors in relation to smoking and smoking initiation in older adolescents: a prospective cohort study in Bosnia and Herzegovina
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2017 (English)In: BMJ Open, ISSN 2044-6055, E-ISSN 2044-6055, Vol. 7, no 3, article id e014066Article in journal (Refereed) Published
Abstract [en]

Objective: Sport and scholastic factors are known to be associated with cigarette smoking in adolescence, but little is known about the causality of this association. The aim of this study was to prospectively explore the relationships of different sport and scholastic factors with smoking prevalence initiation in older adolescents from Bosnia and Herzegovina.

Methods: In this 2-year prospective cohort study, there were 872 adolescent participants (16 years at baseline; 46% females). The study consisted of baseline tests at the beginning of the third year (September 2013) and follow-up at the end of the fourth year of high school (late May to early June 2015). The independent variables were scholastic and sport-related factors. The dependent variables were (1) smoking at baseline, (2) smoking at follow-up and (3) smoking initiation over the course of the study. Logistic regressions controlling for age, gender and socioeconomic status were applied to define the relationships between independent and dependent variables.

Results: School absence at the baseline study was a significant predictor of smoking initiation during the course of the study (OR 1.4, 95% CI 1.1 to 1.8). Those who reported quitting sports at baseline showed an increased risk of smoking at the end of the study (OR 1.4, 95% CI 1.1 to 2.0) and of smoking initiation (OR 1.8, 95% CI 1.3 to 2.0). Adolescents who reported lower competitive achievements in sport were at a higher risk of (1) smoking at baseline (OR 1.5, 95% CI 1.1 to 2.1), (2) smoking at follow-up (OR 1.5, 95% CI 1.1 to 2.1) and (3) smoking initiation (OR 1.6, 95% CI 1.1 to 2.6).

Conclusions: In developing accurate antismoking public health policies for older adolescents, the most vulnerable groups should be targeted. The results showed that most participants initiated smoking before 16 years of age. Therefore, further investigations should evaluate the predictors of smoking in younger ages.

Keywords
Sport, scholastic factors, logistic regression, smoking
National Category
Public Health, Global Health, Social Medicine and Epidemiology
Identifiers
urn:nbn:se:miun:diva-30494 (URN)10.1136/bmjopen-2016-014066 (DOI)000398959400129 ()28336745 (PubMedID)2-s2.0-85016249662 (Scopus ID)
Available from: 2017-03-23 Created: 2017-03-23 Last updated: 2017-11-29Bibliographically approved
Pojskic, H., Pagaduan, J., Uzicanin, E., Babajic, F., Muratovic, M. & Tomljanovic, M. (2015). Acute Effects of Loaded Whole Body Vibration Training on Performance. Asian journal of Sports Medicine, 6(1), Article ID e24054.
Open this publication in new window or tab >>Acute Effects of Loaded Whole Body Vibration Training on Performance
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2015 (English)In: Asian journal of Sports Medicine, ISSN 2008-000X, E-ISSN 2008-7209, Vol. 6, no 1, article id e24054Article in journal (Refereed) Published
Abstract [en]

Background: The application of whole body vibration (WBV) as a warm-up scheme has been receiving an increasing interest among practitioners.

Objectives: The aim of this study was to determine the effect of loaded and unloaded WBV on countermovement jump, speed and agility.

Patients and Methods: Twenty-one healthy male college football players (age: 20.14 ± 1.65 years; body height: 179.9 ± 8.34 cm; body mass: 74.4 ± 13.0 kg; % body fat: 9.45 ± 4.8) underwent randomized controlled trials that involved standing in a half squat position (ST), ST with 30% of bodyweight (ST + 30%), whole body vibration at f = 50 Hz, A = 4 mm (WBV), and WBV with 30% bodyweight (WBV + 30% BW) after a standardized warm-up. Post measures of countermovement jump, 15-m sprint, and modified t-test were utilized for analyses.

Results: One way repeated measures ANOVA revealed a significant difference in the countermovement jump performance, F (3, 60 = 9.06, η2 = 2.21, P = 0.000. Post-hoc showed that WBV + 30% BW posted significant difference compared to (P = 0.008), ST + 30% BW (P = 0.000) and WBV (P = 0.000). There was also a significant difference in the sprint times among interventions, F (3, 60) = 23.0, η2 = 0.865, P = 0.000. Post hoc showed that WBV + 30% BW displayed significantly lower time values than ST (P = 0.000), ST + 30% BW (P = 0.000) and WBV (P = 0.000). Lastly, there was a significant difference in the agility performance across experimental conditions at F(2.01, 40.1) = 21.0, η2 = 0.954, P = 0.000. Post hoc demonstrated that WBV have lower times than ST (P = 0.013). Also, WBV + 30% BW posted lower times compared to ST (P = 0.000), ST + 30% (P = 0.000) and WBV (P = 0.003).

Conclusions: Additional external load of 30% bodyweight under WBV posted superior gains in countermovement jump, speed and agility compared to unloaded WBV, loaded non-WBV and unloaded non-WBV interventions.

Keywords
Exercise; Warm-Up Exercise; Athletic Performance; Football
National Category
Sport and Fitness Sciences
Identifiers
urn:nbn:se:miun:diva-28563 (URN)10.5812/asjsm.24054 (DOI)
External cooperation:
Available from: 2016-08-20 Created: 2016-08-20 Last updated: 2017-11-28Bibliographically approved
Pojskic, H., Pagaduan, J., Babajic, F., Uzicanin, E., Muratovic, M. & Tomljanovic, M. (2015). Acute effects of prolonged intermittent low-intensity isometric warm-up schemes on jump, sprint, and agility performance in collegiate soccer players. Biology of Sport, 32(2), 129-134
Open this publication in new window or tab >>Acute effects of prolonged intermittent low-intensity isometric warm-up schemes on jump, sprint, and agility performance in collegiate soccer players
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2015 (English)In: Biology of Sport, ISSN 0860-021X, E-ISSN 2083-1862, Vol. 32, no 2, p. 129-134Article in journal (Refereed) Published
Abstract [en]

The aim of the present study was to compare the effects of different warm-up interventions on jump, sprint and agility performance in collegiate soccer players. Twenty-one healthy male college soccer players (age: 20.14 ± 1.65 years; body height: 179.9 ± 8.34 cm; body mass: 74.4 ± 13.0 kg; % body fat: 9.45 ± 4.8) participated in the study. Subjects underwent four different randomized warm-up protocols separated by at least 48 hours. The warm-up schemes were: 1. no conditioning contraction protocol (NCC); 2. dynamic stretching (DS); 3. prolonged intermittent low-intensity isometric exercise (ST); and, 4. ST with an additional external load equal to 30% of body weight (ST + 30% BW). All interventions were preceded by a general warm-up. Results from one-way repeated measures ANOVA demonstrated a significant difference in countermovement jump (CMJ) at F(3,60) = 10.2, ηρ² = 0.337, p < 0.01. Post hoc analysis revealed a significant difference in CMJ performance in DS when compared to NCC and ST + 30% BW. No significant difference in CMJ was observed between DS and ST. CMJ scores in NCC, ST, and ST + 30% BW were non-significant. There was a significant difference in speed; F(3, 60) = 6.61, ηρ² = 0.248, p < 0.01. Post hoc analysis revealed significantly better time in DS than NCC and ST. However, no difference in speed was observed between DS and ST + 30% BW. Similarly, speed was similar in NCC, ST and ST + 30% BW. A significant difference in agility performance was also observed; F(3, 60) = 24.1, ηρ²= 0.546, p < 0.01. Post hoc analysis revealed significantly greater performance gains in DS than NCC. No significant difference in agility was observed in DS, ST and ST + 30% BW. In conclusion, a prolonged intermittent low-intensity isometric protocol using bodyweight only showed similar benefits with dynamic stretching in countermovement jump performance. When the same isometric condition with additional load equal to 30% of bodyweight was applied, effects in speed and agility were similar to dynamic stretching.

Place, publisher, year, edition, pages
Warsaw: , 2015
Keywords
post activation potentiation, fatigue, conditioning contraction, countermovement jump, external load
National Category
Sport and Fitness Sciences
Identifiers
urn:nbn:se:miun:diva-28540 (URN)10.5604/20831862.1140427 (DOI)
External cooperation:
Available from: 2016-08-15 Created: 2016-08-15 Last updated: 2017-11-28Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-9554-1234

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