Hamstring Myofascial Stiffness Study 2023-4
Description
Data from athletes with a previous hamstring injury and controls. Shear wave elastography data from the semitendinosus and biceps femoris in KpA was collected during passive tests from 0, 45 and 90 degrees of knee flexion and during submaximal contractions at 60% of maximum isometric strength. Surface electromyography data were also collected and panoramic ultrasound images were also used to measure the anatomical cross sectional area of some athletes
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Steps to reproduce
1. US measurements were performed with the LOGIQ E9 ultrasound system (version R5, General Electric, Chicago, USA) using an ML6-15 (4–15 MHz) linear array transducer and a 9L (2–8 MHz) 2D linear transducer for B-mode and elastography measurements, respectively. 2. The SWE modulus was measured using the US system default standard musculoskeletal setting 3. Bipolar surface electrodes with a distance of 1 cm between the electrodes were used to record the EMG signal using two wireless Shimmer3 EMG devices (Shimmer Research Ltd, Dublin, Ireland) from the semitendonosus and biceps femoris. RMS values were calculated and expressed as a percentage of maximum voluntrary contraction 4. Isometric maximum strength was measured in each angle using a hand-held dynamometer (K-Force muscle controller, sampling rate 75 Hz, Kinvent, Montpellier, France) 5. Anatomical Cross-sectional area was measured by obtaining panoramic ultrasound images at 50% of each muscle length and then drawing (on DICOM image files) the contours using image-based software