4 edition of Quadriceps-hamstring ratios for isotonic and isokinetic measurements found in the catalog.
Quadriceps-hamstring ratios for isotonic and isokinetic measurements
Written in English
|Statement||by Douglas Armstrong.|
|The Physical Object|
|Pagination||v, 33 leaves|
|Number of Pages||33|
Effect of Gravity Correction on Isokinetic Average Force of the Quadriceps and Hamstring uncorrected data tends to inflate the ratio.[4,5] Although isokinetic strength of the quadriceps and hamstring muscle groups has traditionally been Each subject performed a warm up session prior to measurement . Dear Internet Archive Supporter, I ask only once a year: please help the Internet Archive today. Right now, we have a 2-to-1 Matching Gift Campaign, so you can triple your impact! Most can’t afford to give, but we hope you can. The average donation is $ If everyone reading this chips in just $5, we can end this fundraiser today. Dec 01, · Isotonic exercise also has the advantage of being more functional than isokinetic exercise. To our knowledge effect of isotonic eccentric quadriceps exercises on patellofemoral pain syndrome has not been studied though a relationship has been seen between the PFPS and eccentric quadriceps contraction.
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Quadriceps-hamstring ratios for isotonic and isokinetic measurements. [Douglas Armstrong] Book, Archival Material: All Authors / Contributors: Add tags for "Quadriceps-hamstring ratios for isotonic and isokinetic measurements".
Be the first. Similar Items. Isokinetic hamstrings/quadriceps ratios: Normal values and reproducibility in sport students ratios during isokinetic testing at different velocities. Isokinetic measurements of knee.
Mar 01, · We compared functional and conventional isokinetic hamstring: quadriceps strength ratios and examined their relation to knee joint angle and joint angular velocity.
Peak and angle-specific (50°, 40°, and 30° of knee flexion) moments were determined during maximal concentric and eccentric muscle contractions (10° to 90° of motion; 30 and Cited by: Comparison of hamstring/quadriceps ratio between isoinertial and isokinetic measurements Article (PDF Available) in Isokinetics and exercise science 21(2) · June with Reads.
Comparison of Isotonic and Isokinetic measurements of extension/flexion strength and Quadriceps-Hamstring ratio Conference Paper (PDF Available) · January with 42. Mar 21, · The aim of this study was to compare isokinetic quadriceps and hamstring muscle strength in patients following anterior cruciate ligament (ACL) reconstruction who received either hamstring (HT) or quadriceps (QT) tendon autografts at two time intervals within the first year after surgery.
One hundred twenty-four patients, 81 males (age ± years) and 43 females (age Cited by: Isotonic quadriceps-hamstring strength ratio of patients with knee osteoarthritis and apparently healthy controls. isotonic, and isokinetic testing devices.
Biomechanical factors were. Isokinetic Hamstrings:Quadriceps Ratios in Intercollegiate Athletes. Q ratio provides a quantitative measurement of torque from agonist and antagonist muscle contraction surrounding the knee joint.
15 This ratio has also been examined as a possible screening tool for predisposition to injury. 23 When the knee is injured. Comprehensive isokinetic knee measurements and quadriceps tendon evaluations in footballers for assessing functional performance.
during isokinetic measurements with the ratios calculated. Sep 01, · Isokinetic moment ratios of the hamstrings (H) and quadriceps (Q) muscle groups, and their implication in muscle imbalance, have been investigated for more than three decades. The conventional concentric H/Q ratio with its normative value of Cited by: May 23, · Isokinetic concentric knee extension and flexion muscle strength measurements were conducted using a Technogym REV dynamometer (Gambettola, Italy).
We used a standardized test protocol and recorded concentric knee extension and flexion torques Newton meter (N·m) and joint angles with a Hz sampling frequency (6,8,9,17).Cited by: 4. Quadriceps and hamstring isokinetic strength and electromyographic activity measured at different ranges of motion: A reproducibility study it does involve some risk when assessing patients impaired with specific disorders of the quadriceps, hamstring or the knee joint.
Isokinetic measurements of knee muscles were conducted using the Cited by: Isokinetic Hamstring: Quadriceps Strength Ratio in Males and Females: Implications for ACL Injury Meghan Eileen Lyons University of North Florida Measurements of the forces absorbed by the body in jumping activities are recorded at anywhere from three to 14 times the body weight.
ThisCited by: 2. static test, and Isotonic testing which measures strength at the strongest portion of the ROM and is also effected by speed of movement. Isokinetic resistance will accommodate to pain, fatigue, changes in length tension curve and biomechanical leverage of the muscle allowing for safe efficient exercise and testing.
Because of. This study was conducted to compare the isotonic quadriceps-hamstring (Q/H) ratios of patients with knee osteoarthritis (OA) and apparently healthy control subjects.
The relationships between Q/H ratio and each of height, total body weight, age and Quetelet index of both groups were also investigated. Isometric, Isotonic, and Isokinetic Torque Variations in Four Muscle Groups Through a Range of Joint Motion JOSEPH J.
KNAPIK, JAMES E. WRIGHT, ROBERTA H. MAWDSLEY, and JOANNE BRAUN The purpose of this investigation was to describe and examine variations in maximal torque produced by knee extension, knee flexion, elbow extension, and.
Functional hamstring to quadriceps ratio in football players Injuries and therefore injury prevention is a big topic in football, especially with regards to knee injuries (10, 34 - see references). The (fast and repeated) knee extensions during kicking (also shown in its correlation with isokinetic measurements (26)), seem to have an effect on.
Background and Objectives: This study considered the use of a generalized additive multilevel model to describe the joint-angle-specific functional hamstring to quadriceps ratio (H:Q ratio) in the knee, using all of the available truly isokinetic data within the nuevhogarconsulting.com: Lucas A.
Sousa, André L. Soares, Ahlan B. Lima, Roberto R. Paes, Luiz R. Nakamura, Humberto M. Isokinetic Hamstrings/Quadriceps Ratios: Normal Values and Reproducibility in Sport Students ratios given in knee testing by use of the numeric reports of modern computerized isokinetic equipment.
The HQ ratios are based on the following parameters: peak torque, total work, and average power. permissions, book requests, submissions and Cited by: Comparison of conventional hamstring/quadriceps ratio between genders in level-matched A cross-sectional study design was used to compare an isometric H/Q ratio and functional isokinetic ratio Brown and Weir, 15 the subjects were asked to sit with 90° hip flexion and an initial knee flexion of ° during the isokinetic measurements Cited by: 1.
ISOKINETIC CONCENTRIC QUADRICEPS AND HAMSTRING NORMATIVE DATA FOR ELITE COLLEGIATE AMERICAN FOOTBALL PLAYERS PARTICIPATING IN THE NFL SCOUTING COMBINE JOHN E. ZVIJAC,1 TODD A.
TORISCELLI,2 W. SHANNON MERRICK,3 DEREK F. PAPP,4 AND GARY M. KIEBZAK1 1UHZ Sports Medicine Institute, Doctors Hospital, Baptist Health South Florida, Coral. Short-Term Isokinetic Training Versus Isotonic Training: Effects on Asymmetry in Strength of Thigh Muscles by (conH/Q) torque ratio was lower than During seasonal testing, an isokinetic measurement of knee extensors and flexors was performed at 60º/s.
The athletes were divided into two groups. Nineteen athletes performed the. Jul 05, · Reliability of Concentric, Eccentric and Isometric Knee Extension and Flexion when using the REV Isokinetic Dynamometer quadriceps, hamstring, peak torque, imbalance ratios Zachariassen T, Christensen R, Bulow P, Henriksen M, Bliddal H.
Learning effect of isokinetic measurements in healthy subjects, and reliability and Cited by: HAMSTRING AND QUADRICEPS STRENGTH RATIO: Effect of Age and Gender. JAIYESIMI AO.
JEGEDEJA. muscle strength can be said to be isotonic, isokinetic or isometric. Isometric strength, which is the focus Comparison of male and female Quadriceps, Hamstring Muscle Strengths and Hamstring-Quadriceps Strength Ratio.
isometric or isotonic methods for improving ~trength.~'~*isokinetic devices are to be used for athletic Data measurements were accomplished using of the ratio of hamstrings to quadriceps at both slow and fast speeds. The angle of peak torque. Sep 01, · The aims of the present investigation were (a) to evaluate the effect of eccentric quadriceps training in patients with unilateral patellofemoral pain and (b) to compare the effect of eccentric and concentric quadriceps training in patients with bilateral patellofemoral pain.
Fifteen patients (9 male and 6 female, aged 17–36 years with a mean of years) participated in this study. Nine Cited by: What matters most is the ratio of hamstring strength to that of its antagonist muscle group, the quadriceps. I will refer to this ratio as hamstring:quad.
Many people have strong quads that overpower their hamstrings. This imbalance is often the root cause of nuevhogarconsulting.com: Doug Dupont. In unadjusted analyses, quadriceps strength ratio was highest for the isometric test at 40° of knee flexion while the isometric test at 70° of knee flexion and the isotonic test did not differ significantly on quadriceps strength ratio (P = ).
After adjustment for knee pain during strength testing, there was no statistically significant Author: Yong-Hao Pua, Cheryl Lian-Li Poon, Felicia Jie-Ting Seah, Benjamin F. Mentiplay, Choo-Lye Ho, Foh-Li. ratios were significantly different, and all were approximately equal in magnitude (Table 1).
Therefore, any of the three methods could be used to evaluate the bilateral muscle strength imbalance of athletes. For H/Q ratios, however, the isokinetic method produced significantly greater values at all speeds of measurement than. Hamstrings to quadriceps peak torque ratios diverge between sexes with increasing isokinetic angular velocity with a total of subjects ( male, female).
Males demonstrated a significant correlation between H/Q ratio and isokinetic 27, 28 The articles retrieved varied by subject population and method of measurement of Cited by: ric, isotonic, isokinetic concentric, and isokinetic eccentric). Perform- ance values were recorded for the yard dash, vertical jump, and agility run.
The mean of each group of force variables was then corre- lated with the group mean for each performance variable (yard dash Volume 14 Number 3 September 1 JOSPT. during isokinetic exercise was studied. Both knees of 50 male and 50 female subjects between the ages of 25 and 34 were tested at 60,and " per second on the Cybex I1 isokinetic dynamometer.
The means, standard deviations, ranges, absolute value differences, and analysis of variance were calculated on the torque values. Jun 10, · Development of a single-session assessment protocol for isokinetic testing of the hamstrings/quadriceps strength ratio Article type: Research Article.
for example, found that peak moment (PM) measurements during isokinetic testing of the hamstrings and quadriceps are highly reproducible over a range of velocities (ICC (2, 1) Author: Simon Lafrance, Jimmy Hsu, Laura Caspin, Bennett Yee, Shawn Robbins, Richard Preuss.
Isokinetic exercise, or accommodating variable-resistance exercise, is performed at a fixed speed with the resistance matching the muscle force at that speed of movement.
As the muscle force input changes, the resistance changes because the speed remains constant. Application of the athlete's own muscular resistance is met with a proportional amount of resistance throughout a range of motion.
FirstAscent Physical Therapy ~ Trying to Stay Afloat with Evidence-Based Physical Therapy Practice. isotonic, isometric, and isokinetic.
And if you want to look deeper into the issue, by creating stability of the hip it also will effect the stability up the chain to the pelvis and lower back. (A ratio of >70% hamstrings to quadriceps. Jul 10, · Muscle–tendon gearing is the ratio of the muscle–tendon unit velocity to the fascicle velocity and can be expressed as the product Muscle gearing during isotonic and isokinetic movements in the ankle plantarflexors.
In vivo measurements of the triceps surae complex architecture in man: implications for muscle function. J Cited by: H/Q ratio at the highest versus the lowest isokinetic angular velocity (mean + % at /sec versus + % at /sec, N.S., p=).
DISC The goal of this study was to determine whether females demonstrate different relations between hamstrings to quadriceps ratio and isokinetic velocity compared to males.
The purpose of this study was to establish a normative (reference) database for isokinetic concentric hamstring and quadriceps strength for elite collegiate American football players participating at the NFL Scouting Combine. Short-Term Isokinetic Training Versus Isotonic Training: Effects on Asymmetry in Strength of Thigh Muscles.
torque ratio was lower than During seasonal testing, an isokinetic measurement of knee extensors and flexors was performed at 60°/s. The athletes were divided into two nuevhogarconsulting.com by: Jan 29, · The value of isokinetic training methods has been questioned; 6 however, there has been no argument concerning the reliability of isokinetic testing when testing changes in strength.
Jameson et al. 4 reported low correlations between isokinetic, isotonic, and isometric strength measurements of athletes’ strength at the time of measurement. Isotonic quadriceps-hamstring strength ratios of patients with knee osteoarthritis and apparently healthy controls: Comparison of the Test-Retest Reliability of Hip Strength Measurements Using Dynamometer Fixed by Hand Versus Fixed to a Stable Frame in Female Athletes.Mar 01, · In conclusion, isokinetic, aerobic, and isometric training for four weeks improved pain and functional capacity in patients with knee OA, without superiority of one type of exercise to another.
Isokinetic exercise led to increments in the muscle strength measurements with improved maintenance of the quadriceps/hamstring ratio.The purpose of this study was to compare the relationships among isometric, isotonic, and isokinetic concentric and eccentric quadriceps and hamstring forces and three components of athletic performance as measured by yd dash time, vertical jump, and agility .