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Article

Effects of Eccentric Single-Leg Decline Squat Exercise on the Morphological and Structural Properties of the Vastus Lateralis and Patellar Tendon

1
Faculty of Humanities and Social Sciences, Comillas Pontifical University, 28049 Madrid, Spain
2
Performance and Sport Rehabilitation Laboratory, Faculty of Sport Sciences, University of Castilla-La Mancha, 45071 Toledo, Spain
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2020, 17(24), 9410; https://doi.org/10.3390/ijerph17249410
Received: 26 October 2020 / Revised: 13 December 2020 / Accepted: 14 December 2020 / Published: 15 December 2020
The purpose was to examine the effect of 6-week eccentric single-leg decline squat (SLDSe) training with two technical execution times (3 s or 6 s) on changes related to the structural properties of the vastus lateralis (VL) and patellar tendon (PT). Thirty-six physical active volunteers were randomly divided into three groups: control group (CG, n = 13, age = 20.8 ± 1.9 years, no intervention program), experimental group 1 (EG1, n = 11, age = 21.6 ± 2.5 years, execution time = 6 s) and experimental group 2 (EG2, n = 12, 21.1 ± 1.2 years, execution time = 3 s). Participants completed a 6-week SLDSe training program (80% of 1-RM) three days a week. The structural characteristics of the VL and the PT were measured with ultrasonography before and after 6-week SLDSe training and after 6 weeks of de-training. Our results indicate that EG1 increased ≈21.8% the thickness of the PT and EG2 increased ≈15.7% the thickness of the VL after the 6-week intervention program. EG1 and EG2 showed greater values (p < 0.05) of lean mass and lower values (p < 0.05) of fat percentage on the thigh after the intervention program. In conclusion, the SLDSe training carried out with the execution time of 6 s had greater effects on the structural and elastic properties of the PT, and the exercise with the execution time of 3 s caused greater structural adaptations in the VL musculature. View Full-Text
Keywords: eccentric exercise; single-leg decline squat; patellar tendon; vastus lateralis eccentric exercise; single-leg decline squat; patellar tendon; vastus lateralis
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MDPI and ACS Style

Abián, P.; Martínez, F.; Jiménez, F.; Abián-Vicén, J. Effects of Eccentric Single-Leg Decline Squat Exercise on the Morphological and Structural Properties of the Vastus Lateralis and Patellar Tendon. Int. J. Environ. Res. Public Health 2020, 17, 9410. https://doi.org/10.3390/ijerph17249410

AMA Style

Abián P, Martínez F, Jiménez F, Abián-Vicén J. Effects of Eccentric Single-Leg Decline Squat Exercise on the Morphological and Structural Properties of the Vastus Lateralis and Patellar Tendon. International Journal of Environmental Research and Public Health. 2020; 17(24):9410. https://doi.org/10.3390/ijerph17249410

Chicago/Turabian Style

Abián, Pablo, Fernando Martínez, Fernando Jiménez, and Javier Abián-Vicén. 2020. "Effects of Eccentric Single-Leg Decline Squat Exercise on the Morphological and Structural Properties of the Vastus Lateralis and Patellar Tendon" International Journal of Environmental Research and Public Health 17, no. 24: 9410. https://doi.org/10.3390/ijerph17249410

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