scholarly journals The Hamstring/Quadriceps Ratio in Young Men and Its Relationship with the Functional Symmetry of the Lower Limb in Young Men

Symmetry ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 2033
Author(s):  
Piotr Tabor ◽  
Dagmara Iwańska ◽  
Anna Mazurkiewicz ◽  
Czesław Urbanik ◽  
Andrzej Mastalerz
Keyword(s):  
Muscle Strength ◽  
Vertical Jump ◽  
Reaction Force ◽  
Young Men ◽  
Knee Joints ◽  
Vertical Ground Reaction Force ◽  
Functional Symmetry ◽  
Relationship Of ◽  
The Relationship ◽  
Knee Flexors

The relationship of muscle strength symmetry with the symmetry of dynamic activities such as vertical jump (CMJ) and with symmetry of ranges of motion is ambiguous. Therefore, the aim of the current investigation was to assess the relationship between the flexor/extensor strength ratio and the range of motion of the knee joints and VGRF during jump in a sample of young healthy men. The sample consisted of 64 healthy, active men. The flexor and extensor torques and ranges of active and passive mobility of both knee joints were measured. Vertical ground reaction force (VGRF) was measured using two platforms. There were no significant correlations between the symmetry of muscle strength and the symmetry of ranges of motion and the symmetry of the VGRF. Therefore, using the cluster analysis, 4 subgroups were distinguished due to the size of the flexor/extensor ratio (H/Q ratio). Significant differences were found in the level of strength of the knee flexors between the clusters. Detailed analysis of muscle strength symmetry and VGRF symmetry seem to confirm the Leading Joint Hypothesis theory of motion control in multi-joint systems. It was found that the process of controlling movement by the nervous system compensates for the small asymmetries in the level of muscle strength in the knee flexors and extensors, as well as small asymmetries of VGRF.

scholarly journals Hubungan Keukuatan Otot Lengan dan Power Tungkai dengan Kemampuan Jump Shoot Tim Putri Extrakulikuler Bolabasket SMA Negeri 1 Sukaraja Sukabumi

2021 ◽  
Vol 7 (1) ◽  
pp. 78-85
Author(s):  
Faiz Faozi ◽  
Novy Yuliantini
Keyword(s):  
Experimental Study ◽  
Muscle Strength ◽  
Significant Relationship ◽  
Muscle Power ◽  
Vertical Jump ◽  
Women's Basketball ◽  
Leg Muscle ◽  
Relationship Of ◽  
The Relationship ◽  
Leg Muscle Power

This study aims to determine the relationship of arm muscle strength and leg power with the jump shot ability of the extracurricular women's basketball team. This research is a Non-Experimental study with correlational design.Data collection techniques in this study were tests. The instruments used in this study were push-up tests, vertical jump tests, and ball-to-ring tests with jump shots that were at 5 shot post points with 5x chance to shoot at each post.The results of the analysis showed that: There was a significant relationship between arm muscle strength and jump shoot, significance value 0.001 <0.05, the magnitude of the relationship between arm muscle strength and Jumpshot by 75.3%. (2) There is no significant relationship between leg muscle power and jump shoot in basketball extracurricular women's teams with t count 3.105> t table 2.23, and significance value 0.316 <0.05. (3) There is a significant relationship between arm muscle strength and leg power simultaneously to Jump shoot ability with r = 0.753 and significance = 0.001 with sig F change = 0.004.

scholarly journals RELATIONSHIP OF STRENGTH MUSCLE STRENGTH TO DRIBBLING SKILLS IN FUTSAL GAMES IN SMK NEGERI 03 KAUR

2020 ◽  
Vol 1 (1) ◽  
pp. 1-9
Author(s):  
Edwin Apriansyah ◽  
Febby Erla Perdima ◽  
Satria Agustian Lesmana
Keyword(s):  
Data Analysis ◽  
Muscle Strength ◽  
Vertical Jump ◽  
A Value ◽  
Jump Test ◽  
Analysis Technique ◽  
Leg Muscle ◽  
Correlational Method ◽  
Relationship Of ◽  
The Relationship

Based on the observations of researchers on the implementation of Activities in SMK Negeri 03 Kaur, that the dribbling skills of athletes are not good so that it often causes the ball to get out of control. This problem is thought to be caused by several factors, including the low level of leg muscle strength of students. This study aims to determine the relationship between leg muscle strength and dribbling skills. This research method is a correlational method. The population of this research is all 22 SMK Negeri 03 Kaur players as samples taken in total sampling, the place of research in the field of SMK Negeri 03 Kaur, while the research time is April 2019. Leg muscle strength data is taken by vertical jump test, and Dribbling Ability data taken with the Dribbling test. The data analysis technique of this research uses correlation analysis techniques. The results of the data analysis show that: There is a significant relationship between leg muscle strength (X) and dribbling skills in students of State Vocational School 03 Kaur, with a value of rxy = 0.96 r (0.05) (22) = 0.423.

scholarly journals The Relationship Between Vertical Loadrates and Tibial Acceleration Across Footstrike Patterns

2018 ◽  
Vol 3 (3) ◽  
pp. 2473011418S0020 ◽  
Author(s):  
Irene Davis ◽  
Todd Hayano ◽  
Adam Tenforde
Keyword(s):  
Impact Loading ◽  
Ground Reaction Force ◽  
Reaction Force ◽  
Force Plate ◽  
Correlation Coefficients ◽  
Strongly Correlated ◽  
Vertical Ground Reaction Force ◽  
Vertical Ground ◽  
Tibial Acceleration ◽  
The Relationship

Category: Other Introduction/Purpose: While the etiology of injuries is multifactorial, impact loading, as measured by the loadrate of the vertical ground reaction force has been implicated. These loadrates are typically measured with a force plate. However, this limits the measure of impacts to laboratory environments. Tibial acceleration, another measure of running impacts, is considered a surrogate for loadrate. It can be measured using new wearable technology that can be used in a runner’s natural environment. However, the correlation between tibial acceleration measured from mobile devices and vertical ground reaction force loadrates, measured from forceplates, is unknown. The purpose of this study was to determine the correlation between vertical and resultant loadrates to vertical and resultant tibial acceleration across different footstrike patterns (FSP) in runners. Methods: The study involved a sample of convenience made up of 169 runners (74 F, 95 M; age: 38.66±13.08 yrs) presenting at a running injury clinic. This included 25 habitual forefoot strike (FFS), 17 midfoot strike (MFS) and 127 rearfoot strike (RFS) runners. Participants ran on an instrumented treadmill (average speed 2.52±0.25 m/s), with a tri-axial accelerometer attached at the left distal medial tibia. Only subjects running with pain <3/10 on a VAS scale during the treadmill run were included to reduce the confounding effect of pain. Vertical average, vertical instantaneous and resultant instantaneous loadrates (VALR, VILR and RILR) and peak vertical and resultant tibial accelerations (VTA, RTA) were averaged for 8 consecutive left steps. Correlation coefficients (r) were calculated between tibial accelerations and loadrates. Results: All tibial accelerations were significantly correlated across all loadrates, with the exception of RTA with VILR for FFS (Table 1) which was nearly significant (p=0.068). Correlations ranged from 0.37-0.82. VTA was strongly correlated with all loadrates (r = 0.66). RTA was also strongly correlated with both loadrates for RFS and MFS, but only moderately correlated with loadrates for FFS (r = 0.47). Correlations were similar across the different loadrates (VALR, VILR, RILR). Conclusion: The stronger correlation between vertical tibial acceleration and all loadrates (VALR, VILR, RILR) suggests that it may be the best surrogate for loadrates when studying impact loading in runners.

scholarly journals HUBUNGAN KEKUATAN OTOT TUNGKAI DAN KOORDINASI MATA KAKI TERHADAP HASIL SHOOTING BOLA DIAM KE ARAH GAWANG

2019 ◽  
Vol 2 (1) ◽  
pp. 36
Author(s):  
Jack suman Rulis Manurung
Keyword(s):  
Regression Analysis ◽  
Data Analysis ◽  
Muscle Strength ◽  
Measurement Techniques ◽  
Sampling Technique ◽  
Leg Muscle ◽  
Relationship Of ◽  
The Relationship ◽  
Computerized System ◽  
Method Of Correlation

The purpose of this research is to find out: 1) The relationship of leg muscle strength to the results of shooting the silent ball towards the goal. 2) Relationship between ankle coordination and the result of shooting the ball silently towards the goal. 3) The relationship between leg muscle strength and ankle coordination towards the results of shooting the ball silently towards the goal.The method used in this study is a method of correlation with test and measurement techniques. Data analysis was carried out by a computerized system with simple or multiple regression analysis. The population in this study were students who participated in extra-curricular football at Pontianak's N 8 High School, totaling 22 people. In this study, there was no sampling technique because it took all the population who participated in 22 extra-curricular activities.The results of the analysis of the data obtained indicate that: 1) There is a relationship between leg muscle strength to the results of shooting the silent ball towards the goal. 2) There is a coordination relationship between the ankles and the result of shooting the silent ball towards the goal. 3) There is a relationship between leg muscle strength and ankle coordination towards the results of shooting the silent ball towards the goal.The amount of donation given by leg muscle strength to the results of silent ball shooting towards the goal was 52.1%, while the coordination contribution of the ankle to the results of silent ball shooting towards the goal was 25.3%. While the magnitude of the contribution given by the two variables, namely leg muscle strength and ankle coordination was 59% of the results of shooting the silent ball towards the goal. It is recommended that in addition to practicing silent ball shooting techniques towards the goal, leg muscle strength should be taken into consideration for the trainer in giving a portion of training.

Biomechanical Comparison in Different Jumping Tasks Between Untrained Boys and Men

2013 ◽  
Vol 25 (1) ◽  
pp. 101-113 ◽  
Author(s):  
Savvas N. Lazaridis ◽  
Eleni I. Bassa ◽  
Dimitrios Patikas ◽  
Konstantinos Hatzikotoulas ◽  
Filippos K. Lazaridis ◽  
...  
Keyword(s):  
Vertical Jump ◽  
Reaction Force ◽  
Knee Kinematics ◽  
Emg Activity ◽  
Drop Jump ◽  
Adult Males ◽  
Vertical Ground Reaction Force ◽  
Vertical Ground ◽  
Biomechanical Comparison ◽  
Braking Phase

This study examines the biomechanical differences during different vertical jump tasks in 12 prepubescent and 12 adult males. The sagittal knee kinematics, vertical ground reaction force (vGRF) and electromyographic (EMG) activity of 5 lower extremity muscles were recorded. Compared with boys, men presented higher peak vGRF during the propulsive phase in all examined jumps, but lower values during the braking phase, even when related to body mass. Normalized EMG agonist activity in all phases was higher in men (p < .05), while antagonist coactivation was enhanced in boys (p < .05). The knee joint was on average 9 degrees more flexed at touchdown in men during drop jump tasks, but boys exhibited 12 degrees and 17 degrees higher knee flexion at the deepest point when performing drop jump from 20 and 40 cm, respectively. In conclusion, the performance deficit observed in boys in all jump types is a reflection of their immature technique, which could be partly attributed to the less efficient stiffness regulation and activation of their neuromuscular system.

The Relationship Between Vertical Ground Reaction Force, Loading Rate, and Sound Characteristics During a Single-Leg Landing

2020 ◽  
Vol 29 (5) ◽  
pp. 541-546
Author(s):  
Caroline Lisee ◽  
Tom Birchmeier ◽  
Arthur Yan ◽  
Brent Geers ◽  
Kaitlin O’Hagan ◽  
...  
Keyword(s):  
Ground Reaction Force ◽  
Loading Rate ◽  
Reaction Force ◽  
Measurement Techniques ◽  
Sound Frequency ◽  
Clinical Population ◽  
Vertical Ground Reaction Force ◽  
Vertical Ground ◽  
The Relationship ◽  
Linear Loading

Context: Landing kinetic outcomes are associated with injury risk and may be persistently altered after anterior cruciate ligament injury or reconstruction. However, it is challenging to assess kinetics clinically. The relationship between sound characteristics and kinetics during a limited number of functional tasks has been supported as a potential clinical alternative. Objective: To assess the relationship between kinetics and sound characteristics during a single-leg landing task. Design: Observational Setting: Laboratory. Participants: There was total of 26 healthy participants (15 males/11 females, age = 24.8 [3.6] y, height = 176.0 [9.1] cm, mass = 74.9 [14.4] kg, Tegner Activity Scale = 6.1 [1.1]). Intervention: Participants completed single-leg landings onto a force plate while audio characteristics were recorded. Main Outcome Measures: Peak vertical ground reaction force, linear loading rate, instantaneous loading rate, peak sound magnitude, sound frequency were measured. Means and SDs were calculated for each participant’s individual limbs. Spearman rho correlations were used to assess the relationships between audio characteristics and kinetic outcomes. Results: Peak sound magnitude was positively correlated with normalized peak vertical ground reaction force (ρ = .486, P = .001); linear loading rate (ρ = .491, P = .001); and instantaneous loading rate (ρ = .298, P = .03). Sound frequency was negatively correlated with instantaneous loading rate (ρ = −.444, P = .001). Conclusions: Peak sound magnitude may be more helpful in providing feedback about an individual’s normalized vertical ground reaction force and linear loading rate, and sound frequency may be more helpful in providing feedback about instantaneous loading rate. Further refinement in sound measurement techniques may be required before these findings can be applied in a clinical population.

scholarly journals MO066ESTABLISHING THE RELATIONSHIP OF MUSCLE STRENGTH AND MUSCLE MASS WITH 5-YEAR CLINICAL OUTCOMES IN KIDNEY TRANSPLANTATION

2016 ◽  
Vol 31 (suppl_1) ◽  
pp. i57-i58
Author(s):  
Winnie Chan ◽  
Jos Bosch ◽  
Okdeep Kaur ◽  
Anna Phillips ◽  
Richard Borrows
Keyword(s):  
Kidney Transplantation ◽  
Muscle Strength ◽  
Clinical Outcomes ◽  
Muscle Mass ◽  
Relationship Of ◽  
The Relationship

scholarly journals The Relationship Between Muscle Strength, Anaerobic Performance, Agility, Sprint Ability and Vertical Jump Performance in Professional Basketball Players

2012 ◽  
Vol 31 (1) ◽  
pp. 149-158 ◽  
Author(s):  
Utku Alemdaroğlu
Keyword(s):  
Muscle Strength ◽  
Vertical Jump ◽  
Body Height ◽  
Field Tests ◽  
Anaerobic Performance ◽  
Basketball Players ◽  
Jump Performance ◽  
Professional Basketball ◽  
The Relationship ◽  
Sprint Ability

The Relationship Between Muscle Strength, Anaerobic Performance, Agility, Sprint Ability and Vertical Jump Performance in Professional Basketball PlayersThe purpose of this study was to investigate the relationship between isokinetic knee strength, anaerobic performance, sprinting ability, agility and vertical jump performance in first division basketball players. Twelve male first division basketball players participated in this study. The mean age was 25.1 ± 1.7 yrs; mean body height 194.8 ± 5.7 cm; mean body mass 92.3± 9.8 kg; mean PBF 10.1± 5.1; and mean VO2max50.55 ± 6.7 ml/kg/min. Quadriceps and hamstrings were measured at 60° and 180°/s, anaerobic performance was evaluated using the Wingate anaerobic power test, sprint ability was determined by single sprint performance (10-30 m), jump performance was evaluated by countermovement (CMJ) and squat jump (SJ) tests and agility performance was measured using the T drill agility test. Quadriceps strength was significantly correlated with peak power at all contraction velocities. However, for mean power, significant correlation was only found between the 60° left and 180° right knee quadriceps measurements. No measure of strength was significantly related to the measurements from/results of field tests. Moreover, strong relations were found between the performance of athletes in different field tests (p< 0.05). The use of correlation analysis is the limitation of the this study.

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