from 01.01.2023 until now Saint Petersburg Electrotechnical University "Leti" (SPbGETU "LETI", kafedra LINS, Nauchno-issledovatel'skaya laboratoriya "Sistemy zahvata i modelirovaniya dvizheniya", Programmer (Biomechanical engineering))
from 01.01.2022 until now Saint-Petersburg, St. Petersburg, Russian Federation
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The aim of the study was to find the difference in the lengths of the muscular spindle and tendon when performing a semi-squat and a deep squat. The study involved 5 men who are professionally engaged in powerlifting. Graphs of the dependence of the length of the "muscle-tendon" system are constructed from the time of performing exercises for the rectus femoris muscle for all participants. It was revealed that four participants had an increase in the length of the rectus femoris muscle on both legs with a deep squat, compared with a semi–squat, and one had a decrease. An asymmetry in the indicators between the left and right legs was revealed in a participant who previously had a patellar injury.
biomechanics, sports, video analysis, OpenSim, Qualisys, semi-squat, deep squat
1. Bloomquist K., Langberg H., Karlsen S., Madsgaard S., Boesen M., Raastad T. Effect of range of motion in heavy load squatting on muscle and tendon adaptations. Eur. J. Appl. Physiol., 2013, Vol. 113, No 8, pp. 2133-2142. DOI:https://doi.org/10.1007/s00421-013-2642-7.
2. Huxley A.F. Muscle structure and theories of contraction. Prog. Biophys. Biophys. Chem., 1957, Vol. 7, pp. 255-318.
3. Seth A., Hicks J.L., Uchida T.K., Habib A., Dembia C.L. et al. OpenSim: Simulating musculoskeletal dynamics and neuromuscular control to study human and animal movement. PLoS Comput. Biol., 2018, 14(7):e1006223. DOI:https://doi.org/10.1371/journal.pcbi.1006223
4. Chen L., Jiang Z., Yang Ch., Cheng R., Zheng S., Qian J. Effect of different landing actions on knee joint biomechanics of female college athletes: Based on opensim simulation. Front. Bioeng. Biotechnol., 2022, 10:899799. DOI:https://doi.org/10.3389/fbioe.2022.899799