155 research outputs found
ALTERED KINEMATICS, KINETICS AND EMG ACTIVITY IN SUBJECTS WITH FUNCTIONAL INSTABILITY (FI) OF THE ANKLE JOINT DURING A SINGLE LEG DROP JUMP
In sports such as basketball the incidence of FI (recurrent sprain and feelings of “giving way” of the ankle joint) following lateral ankle sprain has been shown to exceed 70% (Yeung et al., 1994). To date no study has investigated simultaneously lower limb 3D kinematics, kinetics and ankle joint muscle activation during a jump landing technique in subjects with FI of the ankle joint
Treatment and prevention of acute and recurrent ankle sprain: an overview of systematic reviews with meta-analysis
The effects of taping and exercise on ankle joint movement in subjects with functional instability (FI) of the ankle joint during a jump down
Evaluating Performance of the Single Leg Squat Exercise with a Single Inertial Measurement Unit
The single leg squat (SLS) is an important component of lower limb rehabilitation and injury risk screening tools. This study sought to investigate whether a single lumbar-worn IMU is capable of discriminating between correct and incorrect performance of the SLS. Nineteen healthy volunteers (15 males, 4 females, age: 26.09±3.98 years, height: 1.75±0.14m, body mass: 75.2±14.2kg) were fitted with a single IMU on the lumbar spine and asked to perform 10 left leg SLS. These repetitions were recorded and labelled by a chartered physiotherapist. Features were extracted from the labelled sensor data. These features were used to train and evaluate a random-forests classifier. The system achieved an average of 92% accuracy, 78% sensitivity and 97% specificity. These results indicate that a single IMU has the potential to differentiate between a correctly and incorrectly completed SLS. This may allow such devices to be used by clinicians to help track rehabilitation of patients and screen for potential
injury risks. Furthermore, the classifier described may be a useful input to an exercise biofeedback application
Evaluating Performance of the Single Leg Squat Exercise with a Single Inertial Measurement Unit
The single leg squat (SLS) is an important component of lower limb rehabilitation and injury risk screening tools. This study sought to investigate whether a single lumbar-worn IMU is capable of discriminating between correct and incorrect performance of the SLS. Nineteen healthy volunteers (15 males, 4 females, age: 26.09±3.98 years, height: 1.75±0.14m, body mass: 75.2±14.2kg) were fitted with a single IMU on the lumbar spine and asked to perform 10 left leg SLS. These repetitions were recorded and labelled by a chartered physiotherapist. Features were extracted from the labelled sensor data. These features were used to train and evaluate a random-forests classifier. The system achieved an average of 92% accuracy, 78% sensitivity and 97% specificity. These results indicate that a single IMU has the potential to differentiate between a correctly and incorrectly completed SLS. This may allow such devices to be used by clinicians to help track rehabilitation of patients and screen for potential
injury risks. Furthermore, the classifier described may be a useful input to an exercise biofeedback application
Clinical Tests Have Limited Predictive Value for Chronic Ankle Instability When Conducted in the Acute Phase of a First-Time Lateral Ankle Sprain Injury
The architectural characteristics of the hamstring muscles do not differ between male and female elite-level rugby union players
Purpose: To determine whether differences exist in the architectural characteristics of the hamstring muscles of elite-level male and female rugby union players.Methods: Forty elite-level rugby union players (male n = 20, female n = 20) participated in this cross-sectional study. A sonographer acquired static ultrasound images using a 92 mm linear transducer to quantify (via a semi-automated tracing software tool) the architectural characteristics (muscle length, fascicle length, pennation angle, and muscle thickness) of the biceps femoris long head and semimembranosus muscles of participants’ left limb. Muscle length and muscle thickness of the biceps femoris short head and semitendinosus muscles of participants’ left limb were also quantified. Bonferroni adjusted independent samples t-tests were performed to evaluate whether differences exist in the architectural characteristics of the hamstring muscles of elite-level male and female rugby union players.Results: There were no significant differences in fascicle length or pennation angle of the hamstring muscles of elite-level male and female rugby union players. Some significant differences in muscle thickness (biceps femoris short head, and semimembranosus) and muscle length (biceps femoris short head, biceps femoris long head, semitendinosus, and semimembranosus) were observed; in all cases the male players had thicker and longer muscles.Conclusion: At a group level, hamstring muscle fascicle length and pennation angle are unlikely to be a sex-specific intrinsic risk factor for Hamstring strain injuries
A comparison of muscle stiffness and musculoarticular stiffness of the knee joint in young athletic males and females
The objective of this study was to investigate the gender-specific differences in peak torque (PT), muscle
stiffness (MS) and musculoarticular stiffness (MAS) of the knee joints in a young active population.
Twenty-two male and twenty-two female recreational athletes participated. PT of the knee joint extensor
musculature was assessed on an isokinetic dynamometer, MS of the vastus lateralis (VL) muscle was
measured in both relaxed and contracted conditions, and knee joint MAS was quantified using the free
oscillation technique. Significant gender differences were observed for all dependent variables.
Females demonstrated less normalized PT (mean difference (MD) = 0.4 N m/kg, p = 0.005, g2 = 0.17),
relaxed MS (MD = 94.2 N/m, p < .001, g2 = 0.53), contracted MS (MD = 162.7 N/m, p < .001, g2 = 0.53)
and MAS (MD = 422.1 N/m, p < .001, g2 = 0.23) than males. MAS increased linearly with the external load
in both genders with males demonstrating a significantly higher slope (p = 0.019) than females. The
observed differences outlined above may contribute to the higher knee joint injury incidence and prevalence
in females when compared to males
Spraino® reduces the risk of lateral ankle sprain injury among indoor sport athletes:a pilot randomized controlled trial with 510 participants
Spraino reduces incidence rate and severity of lateral ankle sprain injuries in indoor sports:A pilot RCT with 510 participants
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