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Article

Between-Leg Mechanical Differences as Measured by the Bulgarian Split-Squat: Exploring Asymmetries and Relationships with Sprint Acceleration

1
Department of Kinesiology, California State University, Fullerton, CA, 92831, USA
2
Department of Kinesiology, California State University, Northridge, CA, 91330, USA
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Sports 2017, 5(3), 65; https://doi.org/10.3390/sports5030065
Received: 18 June 2017 / Revised: 29 August 2017 / Accepted: 29 August 2017 / Published: 1 September 2017
(This article belongs to the Special Issue The Role of Strength on Performance in Athletic Tasks)
Between-leg strength differences can negatively influence sprint acceleration. The challenge is to find a method to measure this within a unilateral exercise. This study analyzed a five repetition-maximum (5RM) Bulgarian split-squat (BSS) to identify between-leg differences for the dominant and non-dominant legs in peak and mean power, force, and velocity as measured by a linear position transducer. Between-leg differences in these variables were correlated with 20-m (0–5, 0–10, 0–20 m intervals) sprint velocity. Eight men were assessed in the 5RM BSS and 20-m sprint. T-tests calculated between-leg differences in power, force, and velocity. Spearman’s correlations calculated relationships between the between-leg differences in the mechanical variables with velocity over each interval. When comparing the dominant and non-dominant legs, there were significant (p = 0.002–0.056) differences in 11 of 12 variables. However, percentage differences were low (~0.3–12%). There was one large, non-significant correlation (best repetition mean force between-leg difference and 0–5 m velocity; ρ = −0.810) out of 36 relationships. The BSS can provide a profile of between-leg differences in power, force, and velocity. There were limited relationships between the BSS between-leg differences and 20-m sprint velocities. Smaller between-leg differences in BSS power, force, and velocity could ensure minimal impact on acceleration. View Full-Text
Keywords: force; power; velocity; single-leg; sprinting; unilateral strength force; power; velocity; single-leg; sprinting; unilateral strength
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MDPI and ACS Style

Lockie, R.G.; Risso, F.G.; Lazar, A.; Giuliano, D.V.; Stage, A.A.; Liu, T.M.; Beiley, M.D.; Hurley, J.M.; Torne, I.A.; Stokes, J.J.; Birmingham-Babauta, S.A.; Davis, D.L.; Orjalo, A.J.; Moreno, M.R. Between-Leg Mechanical Differences as Measured by the Bulgarian Split-Squat: Exploring Asymmetries and Relationships with Sprint Acceleration. Sports 2017, 5, 65. https://doi.org/10.3390/sports5030065

AMA Style

Lockie RG, Risso FG, Lazar A, Giuliano DV, Stage AA, Liu TM, Beiley MD, Hurley JM, Torne IA, Stokes JJ, Birmingham-Babauta SA, Davis DL, Orjalo AJ, Moreno MR. Between-Leg Mechanical Differences as Measured by the Bulgarian Split-Squat: Exploring Asymmetries and Relationships with Sprint Acceleration. Sports. 2017; 5(3):65. https://doi.org/10.3390/sports5030065

Chicago/Turabian Style

Lockie, Robert G., Fabrice G. Risso, Adrina Lazar, Dominic V. Giuliano, Alyssa A. Stage, Tricia M. Liu, Megan D. Beiley, Jillian M. Hurley, Ibett A. Torne, John J. Stokes, Samantha A. Birmingham-Babauta, DeShaun L. Davis, Ashley J. Orjalo, and Matthew R. Moreno. 2017. "Between-Leg Mechanical Differences as Measured by the Bulgarian Split-Squat: Exploring Asymmetries and Relationships with Sprint Acceleration" Sports 5, no. 3: 65. https://doi.org/10.3390/sports5030065

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