Physical and performance characteristics related to starter status, position, and division in Japanese collegiate American-football players

BACKGROUND: Few studies have investigated the variations in body composition and performance in Japanese collegiate American-football players. OBJECTIVE: To clarify what characterizes competitors at the highest levels – in the top division or on the starting lineup – we compared players’ body compositions and performance test results. METHODS: This study included 172 players. Each player’s body composition and performance (one-repetition maximum bench press, one-repetition maximum back squat, and vertical jump height) were measured; power was estimated from vertical jump height and body weight. Players were compared according to status (starter vs. non-starter), position (skill vs. linemen), and division (1 vs. 2). Regression analysis was performed to determine characteristics for being a starter. RESULTS: Players in higher divisions and who were starters were stronger and had more power, greater body size, and better performance test results. Players in skill positions were relatively stronger than those in linemen positions. Vertical jump height was a significant predictor of being a starter in Division 1. CONCLUSION: Power and vertical jump may be a deciding factor for playing as a starter or in a higher division.

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Effects of In-Season (5 Weeks) Creatine and Pyruvate Supplementation on Anaerobic Performance and Body Composition in American Football Players

International Journal of Sport Nutrition ◽

10.1123/ijsn.9.2.146 ◽

1999 ◽

Vol 9 (2) ◽

pp. 146-165 ◽

Cited By ~ 78

Author(s):

Michael H. Stone ◽

Kimberly Sanborn ◽

Lucille L. Smith ◽

Harold S. O'Bryant ◽

Tommy Hoke ◽

...

Keyword(s):

Body Composition ◽

Body Mass ◽

Bench Press ◽

Vertical Jump ◽

American Football ◽

Mass Composition ◽

Football Players ◽

Supplementation Period ◽

And Performance ◽

Body Mass Composition

The purpose of this investigation was to study the efficacy of two dietary supplements on measures of body mass, body composition, and performance in 42 American football players. Group CM (n = 9) received creatine monohy-drate, Group P (n = 11) received calcium pyruvate. Group COM (n = 11) received a combination of calcium pyruvate (60%) and creatine (40%), and Group PL received a placebo. Tests were performed before (Tl) and after (T2) the 5-week supplementation period, during which the subjects continued their normal training schedules. Compared to P and PL. CM and COM showed significantly greater increases for body mass, lean body mass, 1 repetition maximum (RM) bench press, combined 1 RM squat and bench press, and static vertical jump (SVJ) power output. Peak rate of force development for SVJ was significantly greater for CM compared to P and PL. Creatine and the combination supplement enhanced training adaptations associated with body mass/composition, maximum strength, and SVJ; however, pyruvate supplementation alone was ineffective.

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THE RELATIONSHIP BETWEEN MAXIMAL STRENGTH, VERTICAL JUMP, ACCELERATION AND CHANGE OF DIRECTION PERFORMANCE

Facta Universitatis Series Physical Education and Sport ◽

10.22190/fupes191103053r ◽

2020 ◽

pp. 591

Author(s):

Igor Ranisavljev ◽

Milan Matić ◽

Nenad Janković

Keyword(s):

Body Mass ◽

Vertical Jump ◽

Young Male ◽

T Test ◽

Maximum Strength ◽

Jump Height ◽

Repetition Maximum ◽

Change Of Direction ◽

Vertical Jump Height ◽

The Relationship

The goal of the present study was to explore the relationship between maximum strength, the vertical jump, acceleration and change of direction performance in healthy young male students. The sample of variables included the following variables: body mass (BM), one repetition maximum on the half-squat test (Squat 1RM), one repetition maximum normalized for body mass (Squat 1RM_rel), peak power during the concentric phase of countermovement jump (Ppeak CMJ), vertical jump height during CMJ (CMJ_H), time for the 20m sprint (20m Srint) and time for the agility T-Test (Agility T-Test). The relationship was tested with the Pearson Coefficient of linear correlation (r). The results showed significant correlation between body mass with Squat 1RM_rel and peak concentric power during CMJ (r=-.424, and r=.377, respectively). Peak concentric power during CMJ additionally has a significant correlation with the change of direction abilities, 20m sprint, and vertical jump height, (r=-.401; r=-.467; r=.656; p<0.05, respectively). Also, significant correlation was determined between the 20m Sprint and Agility T-Test (r=.443; r=-.570, respectively), and Agility T-Test vertical jump height (r=-.498). The level of relationships between maximum strength, acceleration, COD and CMJ may be attributable to differences in the control and coordination of several muscle groups during execution of these tests.

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Effect of High Intensity and Low Intensity Plyometric on Vertical Jump Height and Maximum Voluntary Isometric Contraction in Football Players

Journal of Exercise Science and Physiotherapy ◽

10.18376//2012/v8i2/67587 ◽

2012 ◽

Vol 8 (2) ◽

pp. 81

Author(s):

R. Shankar ◽

H. Rajpal ◽

M. Arora

Keyword(s):

Isometric Contraction ◽

High Intensity ◽

Vertical Jump ◽

Football Players ◽

Jump Height ◽

Maximum Voluntary Isometric Contraction ◽

Low Intensity ◽

Vertical Jump Height

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Effect of Resistance Tube Exercises on Kicking Accuracy, Vertical Jump and 40-Yard Technical Test in Competitive Football Players – An Experimental Study

Human Movement ◽

10.1515/humo-2015-0005 ◽

2014 ◽

Vol 15 (3) ◽

Author(s):

Alekhya Tirumala ◽

Basavaraj Motimath

Keyword(s):

Test Performance ◽

Vertical Jump ◽

Exercise Program ◽

Test Time ◽

Football Players ◽

Jump Height ◽

Post Intervention ◽

Jump Performance ◽

Vertical Jump Height ◽

Males And Females

AbstractPurpose. Kicking, jumping and agility are important skills in football. These activities require adequate lower limb strength, which can be enhanced with resistance training. The objective of the study was to evaluate the effect of resistance tube exercises on kicking accuracy, vertical jump performance and 40-yard technical test results in competitive football players. Methods. The study involved 23 competitive football players (11 males, 12 females) aged from 18-20 years recruited from three different universities in Belgaum, Karnataka, India. Back heel kick accuracy, vertical jump height and 40-yard technical test time were evaluated before and after a 2-week resistance tube exercise program. Results. Significant improvements in post-intervention kicking accuracy were found when males and females were treated as a single group (p = 0.01). Vertical jump height also showed a highly significant post-intervention improvement in the males and for the combined group of males and females (p = 0.001). The 40-yard technical test values significantly improved in the females and in the combined results for males and females (p = 0.001). Conclusions. The two-week resistance tube exercise program was found to have an effect on kicking accuracy, vertical jump height and 40-yard technical test performance in competitive football players. Resistance tube exercises can thus be included as a component of a regular strength training program for such athletes.

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Comparative Effects of Dynamic Stretching and Cryotherapy on the Physical Performance in Recreational Football Players: A Randomised Crossover Study

Indian Journal of Youth and Adolescent Health ◽

10.24321/2349.2880.202012 ◽

2021 ◽

Vol 07 (03) ◽

pp. 10-15

Author(s):

Kalpana Zutshi ◽

Keyword(s):

Crossover Study ◽

Vertical Jump ◽

P Value ◽

Football Players ◽

Jump Height ◽

Dynamic Stretching ◽

Vertical Jump Height ◽

Significant Difference ◽

Group A ◽

Group B

Background: It has been seen that the effects of dynamic stretching and cryotherapy has good effects in the performance of the football players. There are enough evidences and literature on both individually but the comparison between the two was not found. So, with the same concept comparison has been taken out with some interventions in the recreational football players. Purpose of Study: The purpose of this study was to check the comparative effects of both the interventions upon different variables like vertical jump height, agility and 20 meter sprint. Methodology: 30 subjects were taken, who were divided into 2 groups. The first group received dynamic stretching first and then cryotherapy and the second group vice-versa. Further, after a period of 48 hours of flush out time the interventions were reversed to both the groups. Pre and post readings of variables were taken: vertical jump height, agility and 20 meter sprint. Result: Vertical jump height test was significant for both the groups, after dynamic stretching. Vertical Jump height test had a significant p-value of 0.01 in group A and non-significant value for group B, after cryotherapy that is 0.531. T-test was significant for group A with a p value of 0.01 and non-significant for group B with a P value of 0.481. Significant for group B after cryotherapy with a p-value of 0.061. Conclusion: It can be inferred from the result of the study that each Variable: vertical jump height increased significantly in Group A and B after stretching but there was no significance in group B in the vertical jump height test in which cryotherapy was given first. Cryotherapy significantly increased the 20 meter sprint. Agility increased with dynamic stretching. On comparing the two groups-A and B, it was found that the sequence of altered interventions given (dynamic stretching/ cryotherapy) do not give any significant difference in the results as a whole.

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Relationships Between Hoffman Reflex Parameters, Trait Stress, and Athletic Performance

Perceptual and Motor Skills ◽

10.1177/0031512518782562 ◽

2018 ◽

Vol 125 (4) ◽

pp. 749-768 ◽

Cited By ~ 1

Author(s):

Rasool Bagheri ◽

Mohammad Reza Pourahmadi ◽

Rozita Hedayati ◽

Ziaeddin Safavi-Farokhi ◽

Atefeh Aminian-far ◽

...

Keyword(s):

Athletic Performance ◽

Vertical Jump ◽

High Stress ◽

Performance Testing ◽

Jump Height ◽

Vertical Jump Height ◽

Hoffman Reflex ◽

Training History ◽

And Performance ◽

Gastrocnemius Muscles

This study evaluated the relationships between trait stress, Hoffman reflex, and performance among 36 healthy amateur male athletes. We first obtained a trait stress questionnaire from participants and then assigned them to high- and low-stress groups. We next recorded Hoffman reflex data from the soleus and lateral gastrocnemius muscles and then examined their athletic performance on testing protocols separated by a 72-hour washout period. Performance testing utilized vertical jump height, 20 -m sprint time, and standing stork tests. There were significant correlations between (a) the standing stork test, vertical jump height, and trait stress and (b) Hmax/ Mmax ratios, threshold intensity ( Hth), the intensity of the Hmax, and the intensity of the Hlast. Hth, the intensity of Hmax, and the intensity of Hlast were significantly higher among the low-stress compared with the high-stress participant groups ( p < .05), despite participants’ similar training history. We suggest that self-perceived psychological stress affects performance through neural adaptation.

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Comparison of Prophylactic Ankle Cloth Wrapping and Taping on Vertical Jump Height in Division I Football Players

International Journal of Athletic Therapy & Training ◽

10.1123/ijatt.2016-0106 ◽

2017 ◽

Vol 22 (6) ◽

pp. 40-45 ◽

Cited By ~ 1

Author(s):

John Henderson ◽

Brian C. Lyons ◽

W. Steven Tucker ◽

Ben Davidson

Keyword(s):

Negative Impact ◽

Vertical Jump ◽

Division I ◽

Football Players ◽

Jump Height ◽

Jump Performance ◽

Vertical Jump Height ◽

Division I Football

The purpose of this study was to examine the effects of cloth wrap (CW) and ankle tape (TAP) techniques on vertical jump performance in 29 Division I football players. There was a significant reduction in vertical jump performance for both the TAP (76.2 ± 1.3 cm; t28= 6.5, p < .0005) and CW (77.3 ± 1.3 cm; t28= 3.9, p = .001) conditions as compared with the control (78.4 ± 1.3 cm). The TAP group also had reduced vertical jump scores as compared with the CW group (t28= 4.9, p < .0005). Both prophylactic techniques resulted in decreased vertical jump capability with the TAP having a greater negative impact than the CW.

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AGREEEMENT BETWEEN MEASUREMENT OF JUMP HEIGHT IN DIFFERENT VERTICAL JUMP TESTS EXECUTED BY YOUNG FOOTBALL PLAYERS

Journal of Applied Sports Sciences ◽

10.37393/jass.2020.02.4 ◽

2020 ◽

Vol 2 (2020) ◽

pp. 51-63

Author(s):

Marin Gadev ◽

◽

Petar Peev ◽

Oleg Hristov ◽

◽

...

Keyword(s):

Vertical Jump ◽

Energy System ◽

Lower Limbs ◽

Football Players ◽

Systematic Bias ◽

Jump Height ◽

Explosive Power ◽

Vertical Jump Height ◽

Counter Movement Jump ◽

Anaerobic Energy

ABSTRACT Football is an intermittent sport with a great number of short and explosive actions. These characteristics of the game require a good level of anaerobic power. The main field tests used as indicators of the development of the anaerobic energy system were the jumps in the vertical plane. The same tests also measured the strength of the lower limbs. We presume that the explosive power of the lower limbs characterizes the development of the alactic anaerobic energy system and strength capacity at the same time. In that case the explosive power of the lower limbs was an important component of the conditioning and strength training of football players. There was a great variety of methods and devices which registered vertical jump height. From this point of view, we wanted to add our study to the research work in the specialized literature. The purpose of this study was to analyze the differences of the jump height measured via two devices. We used the following methods of research: accelerometry, chronometry and statistical analysis. We studied the vertical jump height of 32 football players of the Youth Academy of PFC “Levski”– Sofi a at the age of 13,4. In the research the participants performed three jump tests (squat jump [SJ], counter movement jump [CMJ] and counter movement jump with arm swing [CMJA]) as the jump height was measured via accelerometer and Infrared platform. The results from these two devices were compared via Bland Altman plot and calculation of Intraclass correlation coefficients [ICC]. The results of ICC between the two devices showed very strong correlation of the results for the three tests (SJ (R= .91), CMJ (R= .92) and CMJA (R= .87)). The results of the ANOVA showed statistical difference between the measured jump heights (p< .05 for all test, systematic bias was equal to: SJ=15.6; CMJ=15.2; CMJA= 19.5 and effect size (η2) was large SJ= .65; CMJ= .69; CMJA= .65) for the three different types of jump. Conclusions:1) Both of the devices showed good consistency of the collected results; 2) The data collected from the two devices showed significant difference of the jump heights.

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