Hamstring to quadriceps strength ratio and noncontact leg injuries: A prospective study during one season

  title={Hamstring to quadriceps strength ratio and noncontact leg injuries: A prospective study during one season},
  author={Dae-Hyun Kim and Junggi Hong},
  journal={Isokinetics and Exercise Science},
Previous studies have proposed that thigh muscle imbalance is a critical risk factor for the athletic non-contact knee injuries. However, there is a little consensus among prospective studies with regard to the correlation between isokin etic hamstring to quadriceps strength ratio (HQR) and the non-contact knee injury rates. Most of athletic movements at risk are closed kinetic chain movements, and compensatory effect among ankle, knee, and hip joints during the closed kinetic chain movement… 

Figures and Tables from this paper

The Hamstring and ACL Injury Incidence during a Season Is Not Directly Related to Preseason Knee Strength Ratios in Elite Male Soccer Players

The results of this study show that low-angular velocity preseason testing did not result in a player’s HSI or ACL injury during the season and acted as an insufficient factor of injury risk in adult professional soccer players.

Hamstring-to-Quadriceps Ratio in Female Athletes with a Previous Hamstring Injury, Anterior Cruciate Ligament Reconstruction, and Controls

Isokinetic assessment of muscle strength may be useful for setting appropriate targets of training programs for athletes with a history of ACL surgery or hamstring strain, however, isokinetic evaluation of the H:Q ratio is not injury—specific and it does not vary between different methods of calculating the H-Q ratio.

The Relationship between the Hamstring-to-Quadriceps Ratio and Jumping and Sprinting Abilities of Young Male Soccer Players

The correct torque ratio between the knee joint extensor and flexor muscle groups can effectively prevent injuries to the anterior cruciate ligament and hamstring strain. However, it is unclear

Risk factors for hamstring muscle strain injury in sport: a systematic review and meta-analysis

The aim of the current review was to assemble all available knowledge and data to identify the intrinsic and extrinsic risk factors associated with hamstring muscle strain-type injuries.

Exploring the role of football specific fatigue on dynamic knee stability in elite female youth football players

The findings suggest that muscular functioning is not dramatically impaired following fatigue however impairments to neuromuscular functioning were present in all age groups and may be responsible for the increased relative risk of knee injury in female athletes.

The isokinetic strength profile of semi-professional soccer players according to low back pain.

Knee muscle strength variables, resulting from an isokinetic testing, have the potential to discriminate between soccer players with and without a history of low back pain, however, low backPain is a multidimensional phenomenon and knee muscle strength or imbalance alone cannot be expected to explainLow back pain.

Assessment of the lower extremity functional and muscular performance in young female handball athletes

A low physical fitness and incorrect technique could result in muscle strength imbalance and poor dynamic/static balance in handball players. This study aimed to evaluate the muscular and functional

Identification of Neuromuscular Performance Parameters as Risk Factors of Non-contact Injuries in Male Elite Youth Soccer Players: A Preliminary Study on 62 Players With 25 Non-contact Injuries

Assessment of neuromuscular performance parameters within a laboratory-based injury risk screening appears to enable a good indication of injury risk in elite youth soccer players, although this finding has to be taken with caution due to a small number of injury cases.

An Anterior Cruciate Ligament (ACL) Injury Risk Screening and Reduction Program for High School Female Athletes: A Pilot Study

A pre-season screening program for high school female athletes for the presence of known modifiable risk factors that predispose them to sustaining a non-contact ACL injury identified athletes as having multiple modifiable risks that can be addressed with training and exercises.

Age-related differences in torque in angle-specific and peak torque hamstring to quadriceps ratios in female soccer players from 11 to 18 years old: Α Cross-sectional study

The study showed that although peak torque values were higher in U15 than in U13, balance ratios were similar and there was no strength difference between U15 and U18.



Risk factors for leg injuries in female soccer players: a prospective investigation during one out-door season

Multivariate logistic regression showed hyperextension of the knee joint, a low postural sway, reduced H/Q ratio during concentric action, and a higher exposure to soccer to significantly increase the risk of traumatic leg injury.

Isokinetic strength testing does not predict hamstring injury in Australian Rules footballers.

Isokinetic muscle strength testing was not able to directly discriminate Australian Rules football players at risk for a hamstring injury.

Prevention of anterior cruciate ligament injuries.

In this review, dynamic neuromuscular analysis (DNA) training is defined, and a rationale is presented for correcting the neuromUScular imbalances that may result in dynamic knee instability during sports play.

Ratio of hamstring to quadriceps femoris muscles' strength in the anterior cruciate ligament insufficient knee. Relationship to long-term recovery.

Outcome scores did not differ significantly between the groups with low, optimal, or high HQ ratios of the ACLIK but were significantly better in subjects whose HQ ratio of the injured knee was similar to that of their uninjured knee.

Isokinetic muscle imbalance and knee-joint injuries. A prospective blind study.

High-school football players underwent pre-season isokinetic muscle-testing to determine if there was any relationship between an imbalance in thigh-muscle function and the occurrence of knee injuries and no relationship was found.

Isokinetic strength of the quadriceps and hamstrings and functional ability of anterior cruciate deficient knees in recreational athletes.

The H:Q ratio is strongly correlated to the functional ability of ACL deficient knees in Chinese recreational athletes and could be used as an additional measure to guide in the decision making process in the management of ACL deficiency knees.

A comparison of knee joint motion patterns between men and women in selected athletic tasks.

Developments in the use of the hamstring/quadriceps ratio for the assessment of muscle balance.

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

Biomechanical Measures of Neuromuscular Control and Valgus Loading of the Knee Predict Anterior Cruciate Ligament Injury Risk in Female Athletes: A Prospective Study

Knee motion and knee loading during a landing task are predictors of anterior cruciate ligament injury risk in female athletes and may help develop simpler measures of neuromuscular control that can be used to direct female athletes to more effective, targeted interventions.