Muscle Activation and Landing Error Scoring System (LESS) Performance in D1 Swimmers
Arts and Sciences
The purpose of this study was to determine if significant activation differences exist in right and left gluteal muscles of Division I swimmers while performing the Landing Error Scoring System (LESS) jump. The questions to be answered were, “Is there a significant difference between the right and left gluteal muscle activation in Division I swimmers?” and “Is there a significant difference between the right and left gluteal muscle activation between male and female Division I swimmers?” A total of 10 swimmers (M=6; F=4) participated. Each participant performed a prescreening FMS and LESS assessment. For the LESS, researchers attached surface electrodes to the gluteus medius and gluteus maximus of each participant. Participants performed three countermovement LESS jumps. Electromyograms (EMG) of each countermovement jump were recorded with Delsys™ and analyzed using EMGworks®. Data analysis consisted of normalizing the root mean square (RMS) of the three trials to the peak RMS. Independent samples t-tests were revealed no differences between right and left gluteus medius’ and no differences between right and left gluteus maximus’ in male and female swimmers. No significance differences were found in gluteal muscle activations between male and female swimmers. Researcher concludes that in healthy swimmers with good functional movement, gluteal muscle activation seems very similar when performing the LESS movement.
Gonzalez, Selena, "Muscle Activation and Landing Error Scoring System (LESS) Performance in D1 Swimmers" (2018). Symposium on Undergraduate Research and Creative Expression (SOURCE). 710.