Ankle Bracing Decreases Vertical Jump Height and Alters Lower Extremity Kinematics

2016 ◽  
Vol 21 (2) ◽  
pp. 39-46 ◽  
Author(s):  
Bradley Smith ◽  
Tina Claiborne ◽  
Victor Liberi
Keyword(s):  
Lower Extremity ◽  
Vertical Jump ◽  
Plantar Flexion ◽  
Emg Activity ◽  
Jump Height ◽  
Jump Performance ◽  
Vertical Jump Height ◽  
Hip Flexion ◽  
Ankle Plantar Flexion ◽  
Ankle Bracing

The purpose of this study was to determine the effects of ankle bracing on vertical jump performance and lower extremity kinematics and electromyography (EMG) activity. Twenty healthy college athletes participated in two sessions, separated by a minimum of 24 hr. They performed five jumps with no brace on the first day, and five jumps with both ankles braced on the second day. An average of the three highest jumps each day was used for analysis. Braced vertical jump performance significantly decreased (p = .002) as compared with the unbraced condition. In addition, hip flexion (p = .043) and ankle plantar flexion (p = .001) angles were significantly smaller during the braced vertical jump. There was also a significant reduction in soleus muscle EMG (p = .002) during the braced condition.

A Comparative Analysis of Selected Ankle Orthoses during Functional Tasks

2001 ◽  
Vol 10 (3) ◽  
pp. 174-183 ◽  
Author(s):  
James A. Yaggie ◽  
Stephen J. Kinzey
Keyword(s):  
Outcome Measures ◽  
Repeated Measures ◽  
Vertical Jump ◽  
Plantar Flexion ◽  
Jump Height ◽  
Vertical Jump Height ◽  
Run Time ◽  
Joint Range ◽  
Shuttle Run ◽  
Ankle Bracing

Context:Ankle bracing has been used for many years in an attempt to prevent lateral ligamentous injuries of the ankle by restricting joint range of motion (ROM).Objective:To examine the influence of ankle bracing on ROM and sport-related performance.Design:Repeated measures.Setting:Biomechanics laboratory.Participants:30 volunteers. None reported ankle trauma within 2 years preceding the study or had other orthopedic conditions that would have affected physical performance.Intervention:Three brace conditions (McDavid A101™, Perform-8™ Lateral Stabilizer) were assessed during performance of the vertical jump and shuttle run.Main Outcome Measures:shuttle-run time, vertical jump height, inversion, and plantar flexion ROM.Results:Both braces restricted plantar flexion and inversion ROM and caused no change in shuttle-run time or vertical jump height.Conclusions:Our results indicate that bracing the ankle joint increases external lateral support to the joint without significantly restricting functional ability.

Association Between Body Composition and Vertical Jump Performance in Female Collegiate Volleyball Athletes

2021 ◽  
Vol 9 (4) ◽  
pp. 43
Author(s):  
Lindsey Legg ◽  
Megan Rush ◽  
Jordan Rush ◽  
Stephanie McCoy ◽  
John C Garner ◽  
...  
Keyword(s):  
Body Composition ◽  
Lower Extremity ◽  
Fat Mass ◽  
Lean Mass ◽  
Gold Standard ◽  
Vertical Jump ◽  
Jump Height ◽  
Fat Percentage ◽  
Jump Performance ◽  
Total Body

Background of Study: Associations between measures of body composition and vertical jump height have previously been established using a range of instrumentation and prediction equations. Limited data has presented using gold standard measurements for both variables Objective: This investigation sought to examination the relationship between total body and lower extremity measures of body composition and vertical jump performance using gold standard measurements within an athletic population. Methods: Using a cross-sectional, correlational research design fourteen collegiate female volleyball athletes completed body composition, three countermovement jumps (CMJ) and three squat jumps (SJ) analysis using DXA and force platforms. Results: High to very high positive relationships were seen between total body lean (p < 0.001) and fat mass (p < 0.05), lower extremity lean and fat mass (p < 0.01), and CMJ force and power. High negative relationships were present between total body fat percentage(p < 0.05), total fat mass (p < 0.01) and CMJ jump height. Relationships between all body composition variables and SJ performance tended to be weaker, with the exception of total body lean mass (p < 0.05), lower extremity lean mass, and power output (p < 0.01). Conclusions: These findings support much of the previous literature in that increases of mass have subsequent increases in force and power production; however caution should be taken will increases in mass coming from fat or lean tissue.

scholarly journals Both Caffeine and Placebo Improve Vertical Jump Performance Compared With a Nonsupplemented Control Condition

2020 ◽  
pp. 1-4 ◽  
Author(s):  
Jozo Grgic ◽  
Sandro Venier ◽  
Pavle Mikulic
Keyword(s):  
Power Output ◽  
Vertical Jump ◽  
Gelatin Capsule ◽  
Jump Height ◽  
Countermovement Jump ◽  
Maximal Power ◽  
Maximal Power Output ◽  
Jump Performance ◽  
Vertical Jump Height ◽  
And Control

Purpose: To compare the acute effects of caffeine and placebo ingestion with a control condition (ie, no supplementation) on vertical jump performance. Methods: The sample for this study consisted of 26 recreationally trained men. Following the familiarization visit, the subjects were randomized in a double-blind manner to 3 main conditions: placebo, caffeine, and control. Caffeine was administered in the form of a gelatin capsule in the dose of 6 mg·kg body weight−1. Placebo was also administered in the form of a gelatin capsule containing 6 mg·kg−1 of dextrose. Vertical jump performance was assessed using a countermovement jump performed on a force platform. Analyzed outcomes were vertical jump height and maximal power output. Results: For vertical jump height, significant differences were observed between placebo and control conditions (g = 0.13; 95% confidence interval [CI], 0.03–0.24; +2.5%), caffeine and control conditions (g = 0.31; 95% CI, 0.17–0.50; +6.6%), and caffeine and placebo conditions (g = 0.19; 95% CI, 0.06–0.34; +4.0%). For maximal power output, no significant main effect of condition (P = .638) was found. Conclusions: Ingesting a placebo or caffeine may enhance countermovement jump performance compared with the control condition, with the effects of caffeine versus control appearing to be greater than the effects of placebo versus control. In addition, caffeine was ergogenic for countermovement jump height compared with placebo. Even though caffeine and placebo ingestion improved vertical jump height, no significant effects of condition were found on maximal power output generated during takeoff.

scholarly journals Strength and vertical jump performance changes in elite male volleyball players during the season (Cambios en el rendimiento en fuerza y salto vertical en jugadores de élite masculinos de voleibol durante la temporada)

Retos ◽  
2018 ◽  
pp. 291-294
Author(s):  
Miguel Sánchez Moreno ◽  
Carlos García Asencio ◽  
Juan José González Badillo ◽  
David Díaz Cueli
Keyword(s):  
Beneficial Effect ◽  
Strength Training ◽  
Physical Performance ◽  
Lower Limb ◽  
Vertical Jump ◽  
Jump Height ◽  
Jump Performance ◽  
Vertical Jump Height ◽  
Competitive Season ◽  
Volleyball Players

Abstract. This study aimed to analyze the effect of strength training on physical performance in elite male volleyball players during the competitive season. Athletes were assessed at the start of season (SS), midpoint of the competitive season (MS), and at the end of the season (ES). Significant increases were observed in vertical jump height (CMJ), jump squat height (JS) and mean propulsive velocity (MPV) from SS to ES (P < 0.05). Likely beneficial increases were observed on CMJ from SS to MS, on JS from SS to MS and from MS to ES. In addition, likely beneficial effect was found on MPV from MS to ES. Over the full season (SS to ES), very likely beneficial effect was observed on CMJ, MPV and JS. In conclusion, increase in strength of lower limb and vertical jump can be achieved in professional volleyball players over a full playing season. Resumen. El objetivo del estudio fue analizar los efectos de un programa de entrenamiento de fuerza sobre el rendimiento en la fuerza del miembro inferior y la capacidad de salto vertical en jugadores de voleibol masculinos durante la temporada de competición. Los atletas fueron evaluados al inicio (SS), a la mitad (MS) y al final de la temporada (ES). Se observaron aumentos significativos en la altura del salto vertical (CMJ), del salto con cargas (JS) y en la velocidad media propulsiva (MPV) alcanzada con las cargas comunes en el ejercicio de sentadillas entre SS y ES (P < 0.05). El análisis basado en la magnitud del cambio reveló un aumento probable en CMJ de SS a MS, y en JS de SS a MS y de MS a ES. Además, un incremento probable se encontró en MPV de MS a ES. Durante la temporada completa (SS a ES), se observó un aumento muy probable en CMJ, en MPV y JS. En conclusión, se puede lograr un aumento en la fuerza de la extremidad inferior y el salto vertical en jugadores profesionales de voleibol durante una temporada de juego completa.

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

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.

Lower Extremity Strength and Coordination Are Independent Contributors to Maximum Vertical Jump Height

2001 ◽  
Vol 17 (3) ◽  
pp. 181-187 ◽  
Author(s):  
Masao Tomioka ◽  
Tammy M. Owings ◽  
Mark D. Grabiner
Keyword(s):  
Older Adults ◽  
Muscle Strength ◽  
Lower Extremity ◽  
Relative Phase ◽  
Vertical Jump ◽  
Knee Extension ◽  
Jump Height ◽  
Knee Extension Strength ◽  
Vertical Jump Height ◽  
Lower Extremity Strength

We previously reported that lower extremity muscular strength of older adults did not predict success of a balance recovery task. We propose that lower extremity coordination may limit performance independently of lower extremity strength. The present study was conducted to determine the extent to which knee extension strength and hip–knee coordination independently contribute to maximum vertical jump height. Maximum vertical jump height and isometric and isokinetic knee extension strength and power were determined in 13 young adults. Hip–knee coordination during the vertical jump was quantified using relative phase angles. Stepwise nonlinear multiple regression determined the variable set that best modeled the relationship between the dependent variable, maximum vertical jump height, and the independent variables of strength, power, and coordination. The quadratic terms of the normalized knee extension strength at 60 deg·s–1, and the average relative phase during the propulsion phase of the vertical jump, collectively accounted for more than 80% of the shared variance (p= .001). The standardized regression coefficients of the two terms, .59 and .52, respectively (p= .004 and .008), indicated the independence and significance of the contributions of knee extension strength and hip–knee coordination to maximum vertical jump height. Despite the pitfalls of extrapolating these results to older adults performing a balance recovery task, the results are interpreted as supporting the contention that while muscle strength confers a number of functional benefits, the ability to avoid falling as a result of a trip is not necessarily ensured. Increased muscle strength per se can occur in the absence of improved kinematic coordination.

Effects of Neuromuscular Strength Training on Vertical Jumping Performance— A Computer Simulation Study

2001 ◽  
Vol 17 (2) ◽  
pp. 113-128 ◽  
Author(s):  
Akinori Nagano ◽  
Karin G.M. Gerritsen
Keyword(s):  
Lower Extremity ◽  
Strength Training ◽  
Muscle Force ◽  
Vertical Jump ◽  
Jump Height ◽  
Jumping Performance ◽  
Vertical Jump Height ◽  
Muscle Groups ◽  
Isometric Muscle ◽  
Isometric Muscle Force

The purpose of this study was twofold: (a) to systematically investigate the effect of altering specific neuromuscular parameters on maximum vertical jump height, and (b) to systematically investigate the effect of strengthening specific muscle groups on maximum vertical jump height. A two-dimensional musculoskeletal model which consisted of four rigid segments, three joints, and six Hill-type muscle models, representing the six major muscles and muscle groups in the lower extremity that contribute to jumping performance, was trained systematically. Maximum isometric muscle force, maximum muscle shortening velocity, and maximum muscle activation, which were manipulated to simulate the effects of strength training, all had substantial effects on jumping performance. Part of the increase in jumping performance could be explained solely by the interaction between the three neuromuscular parameters. It appeared that the most effective way to improve jumping performance was to train the knee extensors among all lower extremity muscles. For the model to fully benefit from any training effects of the neuromuscular system, it was necessary to continue to reoptimize the muscle coordination, in particular after the strength training sessions that focused on increasing maximum isometric muscle force.

Compensatory Mechanisms in Basketball Players with Jumper’s Knee

2008 ◽  
Vol 17 (4) ◽  
pp. 358-371 ◽  
Author(s):  
Julie A. Siegmund ◽  
Kellie C. Huxel ◽  
C. Buz Swanik
Keyword(s):  
Lower Extremity ◽  
Repeated Measures ◽  
Vertical Jump ◽  
Healthy Controls ◽  
Jump Height ◽  
Jumper’S Knee ◽  
Basketball Players ◽  
Significant Group ◽  
Vertical Jump Height ◽  
Type Design

Context:Determining whether there are compensations in those with jumper’s knee (JK) might further our understanding of the condition.Objective:Comparing lower extremity kinematics and jump performance of basketball athletes with JK with those of healthy controls (C).Design:Repeated-measures control-match design.Setting:University laboratory.Participants:24 male basketball players (12 JK, 12 C) matched by height, weight, position, experience, and frequency of play.Interventions:Standing countermovement and running layup jumps.Main Outcome Measures:Maximum vertical-jump height, footfall landing, and lower extremity sagittal-plane kinematics.Results:There were no significant group differences (P > .05) in vertical-jump height (JK = 64.3 ± 8.6 cm, C = 63.0 ± 9.8 cm) or layup height (JK = 71.3 ± 11.6 cm, C = 73.3 ± 11.0 cm). JK subjects landed flat footed (50%) more than controls (8%). JK subjects showed significantly more hip flexion (JK = 105° ± 24.8°, C = 89.8° ± 14.1°; P = .039) with decreased hip acceleration during the countermovement (JK = −3039 ± 1392°/s2, C = −4229 ± 1765°/s2; P = .040). When landing from the countermovement jump, JK subjects had significantly less knee acceleration (JK = −4960 ± 1512°/s2, C = −6736 ± 2009°/s2; P = 023) and in the layup showed significantly less ankle dorsiflexion (JK = 106.5° ± 9.0°, C = 112.5° ± 7.7°; P = .048) and hip acceleration (JK = − 2841 ± 1094°/s2, C = −3912 ± 1575°/s2; P = .033).Conclusion:Compensatory strategies observed in JK subjects might help maintain performance, because their jump height was similar to that of healthy controls.

scholarly journals Comparison of the effects of static stretching on range of motion and jump height between quadriceps, hamstrings and triceps surae in collegiate basketball players

2019 ◽  
Vol 5 (1) ◽  
pp. e000631 ◽  
Author(s):  
Kosuke Takeuchi ◽  
Fumiko Tsukuda
Keyword(s):  
Range Of Motion ◽  
Vertical Jump ◽  
Random Order ◽  
Triceps Surae ◽  
Jump Height ◽  
Static Stretching ◽  
Basketball Players ◽  
Jump Performance ◽  
Vertical Jump Height ◽  
Collegiate Basketball

ObjectivesThe purpose of the present study was to compare the effects of static stretching (SS) on the range of motion and vertical jump height between the quadriceps, hamstrings and triceps surae in collegiate basketball players.MethodsFourteen male collegiate basketball players (20.2±0.7 years, 179.0±5.0 cm, 71.9±8.3 kg) underwent 5 min of SS for the quadriceps, hamstrings and triceps surae, in random order. Before and after each stretch, the range of motion (ROM) and vertical jump height were measured.ResultsROM of the quadriceps, hamstrings and triceps surae were increased without any difference of relative change in the range. The vertical jump height showed no change after SS of the quadriceps and hamstrings, while it decreased after SS of the triceps surae (p<0.05).ConclusionThese results suggested that SS for the triceps surae may have a large impact on jump performance.

Sign in / Sign up

Export Citation Format

Share Document