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Associations between thoracolumbar fascia deformation, erector spinae activity, and deadlift performance: a matched
Andreas Brandl1, Tobias Schmidt2, Robert Schleip3
1Conservative and Rehabilitative Orthopedics, Department of Sport and Health Sciences, Technical University of Munich, Munich, Germany; Department of Training and Exercise Science, German University of Health & Sport, Ismaning, Germany.
Objectives:
Recent research has pointed to a crucial role of intra- and extramuscular fascial tissue in force transmission. The paraspinal fascia has been shown to contribute to the maintenance of spinal stability and paraspinal muscle activity. This study followed on from a previous investigation of thoracolumbar fascia deformability (TLFD) and its relationship to deadlift performance.
Methods:
10 trained healthy participants, (Mean age ± SD: 34.7 ± 11.8) were compared with untrained controls (35.8 ± 9.3). The TLFD was examined using high-resolution ultrasound. The percentage of one-repetition maximum (%1RM) using a three-axis gyroscope and the average maximal voluntary contraction (%aMVC) of the erector spinae muscle using surface electromyography were determined during deadlifts. A multiple linear regression model (LM) was used to predict %1RM and %aMVC by TLFD. Paired Student's T-tests were used to compare %1RM, %aMVC, deviation from the barbell and TLFD between groups.
Results:
LM revealed no significant effect for TLFD in predicting %1RM (B = 0.344, p = .322), but did in predicting %aMVC (B = -1.47, p = .023). Trained had lower %1RM than untrained (p = .008) and lower %aMVC (p = .028), but no difference in TLFD (p = .415) and deviation of the barbell (p = .519).
Conclusion:
TLFD could be essential for healthy functional movement and contribute to lifting performance.
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