A Comparison of Knee Kinetics between Male and Female Recreational Athletes in Stop-Jump Tasks

Center for Human Movement Sciences, Division of Physical Therapy, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-7135, USA.
The American Journal of Sports Medicine (Impact Factor: 4.36). 01/2002; 30(2):261-7. DOI: 10.1177/03635465020300021901
Source: PubMed


We compared the knee kinetics of 10 male and 10 female recreational athletes (aged 19 to 25 years) performing forward, vertical, and backward stop-jump tasks. Three-dimensional videography and force plate data were used to record the subjects' performance of the three stop-jump tasks, and an inverse dynamic procedure was used to estimate the knee joint resultant forces and moments. Women exhibited greater proximal anterior shear force than did men during the landing phase. All subjects exhibited greater proximal tibia anterior shear force during the landing phase of the backward stop-jump task than during the other two stop-jump tasks. Women also exhibited greater knee extension and valgus moments than did men during the landing phase of each stop-jump task. Men exhibited greater proximal tibia anterior shear force than did women during the takeoff phase of vertical and backward stop-jump tasks. These results indicate that female recreational athletes may have altered motor control strategies that result in knee positions in which anterior cruciate ligament injuries may occur. The landing phase was more stressful for the anterior cruciate ligament of both women and men than the takeoff phase in all stop-jump tasks. Technical training for female athletes may need to be focused on reducing the peak proximal tibia anterior shear force in stop-jump tasks. Further studies are needed to determine the factors associated with the increased peak proximal tibia anterior shear force in female recreational athletes.

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    • "It was indicated that knee joint had a greater loading during side step block landing. Chappell et al. (2002) reported that the landing phase generates larger anterior knee shear forces compared with the takeoff phase. And females exhibit greater proximal tibia anterior shear forces and larger knee extension during the landing phase. "
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    ABSTRACT: The purpose of this study was to examine the effect of block and side step block on lower extremity biomechanics during landing in female volleyball players. Eight female university volleyball players participated in this study. The kinematic and kinetic data were collected by eight Vicon cameras (250 Hz) and two force plates (1000 Hz). The Visual 3D software was used to analyze the kinematic and kinetic of block and side step block landing variables. The results showed a significantly higher knee extensor moment during side step landing than the block landing at the time of peak vertical ground reaction force and peak joint moment. It was concluded that female players displayed greater knee extensor moment during the side step before block landing that may increase the loading on the knee.
    ISBS 2015, Poitires, France; 06/2015
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    • "In that position, the quadriceps angle decreases resulting in a decreased possibility of the quadriceps muscle to pull tibia anteriorly. On the other hand, female exhibit greater anterior shear force on tibia during landing compared to male [17]. More research is needed in order to fully understand how exercise affect tibial translation and possible gender differences. "
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    ABSTRACT: Purpose To evaluate the methodological quality of studies reporting on the measurement properties of the International Knee Documentation Committee subjective knee form (IKDC-SKF) and to evaluate their results following the COnsensus-based Standards for the selection of health status Measurement INstruments (COSMIN) guidelines. Methods Systematic search of articles published about the measurement properties of the IKDC-SKF, review of the studies’ methodological quality, and synthesis of the results using the COSMIN guidelines. Results Twenty-six studies were identified and reviewed. There was strong evidence for good internal consistency, test–retest reliability, and responsiveness. There was moderate evidence for good content and structural validity. With the SF36 as a gold standard, the level of evidence for criterion validity was indeterminate. There was conflicting evidence for hypothesis testing and not enough evidence to evaluate measurement error and cross-cultural validity. There were no floor or ceiling effects. Conclusions This review shows that the IKDC-SKF is a measurement instrument with good internal consistency, test–retest reliability, content and structural validity, and responsiveness and interpretability (no floor and ceiling effects). Further evaluation of measurement error, minimal important change, and hypotheses testing is recommended. The IKDC-SKF seems to be useful as a general instrument for all kinds of knee injuries, which might facilitate its clinical use in situations in which time is a factor. Level of evidence Systematic review, Level III.
    Knee Surgery Sports Traumatology Arthroscopy 09/2014; DOI:10.1007/s00167-014-3283-z · 3.05 Impact Factor
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    • "The tendency to perform sidestep cuts with a straighter knee could be exacerbated by decreased posterior shear hamstrings force (Shultz et al., 2001). Chappell et al. (2002) concluded that increased anterior shear force demonstrated by female athletes was potentially due to the combination of increased quadriceps force, decreased hamstrings force, and decreased knee flexion. Landing or cutting with the knee near full extension is commonly observed in video analysis of ACL injuries (Boden et al., 2000; Olsen et al., 2004). "
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    ABSTRACT: Background Dynamic knee stability is considered a critical factor in reducing anterior cruciate ligament loads. While the relationships between hamstring force production and anterior cruciate ligament loading is well known in vitro, the influence of hamstrings strength to anterior cruciate ligament loading during athletic maneuvers remains unknown. Therefore, the purpose of this study was to determine the influence of hamstring strength on anterior cruciate ligament loading during anticipated sidestep cut. Methods Seventeen recreationally active females were recruited to perform sidestep cutting maneuvers pre/post an acute hamstrings strength reduction protocol. Kinematics and kinetics were calculated during the cut and a musculoskeletal model was used to estimate muscle, joint, and anterior cruciate ligament loads. Dependent t-tests were conducted to investigate differences between the two cutting conditions. Findings Anterior cruciate ligament loading increased by 36% due to reduced hamstrings strength. This was mostly due to a 44% increase in sagittal plane loading and a 24% increase in frontal plane loading. Post strength reduction sidestep cuts were also performed with decreased anterior tibiofemoral shear force, an outcome that would theoretically reduce anterior cruciate ligament loading. However, the overall decrease in hamstrings force production coupled with a more axial hamstrings line of action yielded a net increase in anterior cruciate ligament loading. Interpretation These results suggest that decreased hamstrings strength significantly increases anterior cruciate ligament loading during anticipated sidestep cutting. Additionally, these results support the premise that preseason screening programs should monitor hamstrings strength to identify female athletes with potential deficits and increased injury risk.
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