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Article

Electromyography, Stiffness and Kinematics of Resisted Sprint Training in the Specialized SKILLRUN® Treadmill Using Different Load Conditions in Rugby Players

1
UCAM Research Center for High Performance Sport, Catholic University of Murcia, 30107 Murcia, Spain
2
Strength and Conditioning Society, 00118 Rome, Italy
3
Faculty of Sports Sciences, Catholic University of Murcia, 30107 Murcia, Spain
4
NAR—Nucleus of High Performance in Sport, São Paulo 04753-060, Brazil
*
Author to whom correspondence should be addressed.
Academic Editor: Wei Gao
Sensors 2021, 21(22), 7482; https://doi.org/10.3390/s21227482
Received: 23 September 2021 / Revised: 5 November 2021 / Accepted: 9 November 2021 / Published: 10 November 2021
(This article belongs to the Special Issue Wearable Sensors & Gait)
This study’s aim was to analyze muscle activation and kinematics of sled-pushing and resisted-parachute sprinting with three load conditions on an instrumentalized SKILLRUN® treadmill. Nine male amateur rugby union players (21.3 ± 4.3 years, 75.8 ± 10.2 kg, 176.6 ± 8.8 cm) performed a sled-push session consisting of three 15-m repetitions at 20%, 55% and 90% body mas and another resisted-parachute session using three different parachute sizes (XS, XL and 3XL). Sprinting kinematics and muscle activity of three lower-limb muscles (biceps femoris (BF), vastus lateralis (VL) and gastrocnemius medialis (GM)) were measured. A repeated-measures analysis of variance (RM-ANOVA) showed that higher loads during the sled-push increased (VL) (p ≤ 0.001) and (GM) (p ≤ 0.001) but not (BF) (p = 0.278) activity. Furthermore, it caused significant changes in sprinting kinematics, stiffness and joint angles. Resisted-parachute sprinting did not change kinematics or muscle activation, despite producing a significant overload (i.e., speed loss). In conclusion, increased sled-push loading caused disruptions in sprinting technique and altered lower-limb muscle activation patterns as opposed to the resisted-parachute. These findings might help practitioners determine the more adequate resisted sprint exercise and load according to the training objective (e.g., power production or speed performance). View Full-Text
Keywords: team-sports; performance; muscle activation; loaded sprint; sled-push team-sports; performance; muscle activation; loaded sprint; sled-push
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MDPI and ACS Style

Martínez-Serrano, A.; Marín-Cascales, E.; Spyrou, K.; Freitas, T.T.; Alcaraz, P.E. Electromyography, Stiffness and Kinematics of Resisted Sprint Training in the Specialized SKILLRUN® Treadmill Using Different Load Conditions in Rugby Players. Sensors 2021, 21, 7482. https://doi.org/10.3390/s21227482

AMA Style

Martínez-Serrano A, Marín-Cascales E, Spyrou K, Freitas TT, Alcaraz PE. Electromyography, Stiffness and Kinematics of Resisted Sprint Training in the Specialized SKILLRUN® Treadmill Using Different Load Conditions in Rugby Players. Sensors. 2021; 21(22):7482. https://doi.org/10.3390/s21227482

Chicago/Turabian Style

Martínez-Serrano, Antonio, Elena Marín-Cascales, Konstantinos Spyrou, Tomás T. Freitas, and Pedro E. Alcaraz. 2021. "Electromyography, Stiffness and Kinematics of Resisted Sprint Training in the Specialized SKILLRUN® Treadmill Using Different Load Conditions in Rugby Players" Sensors 21, no. 22: 7482. https://doi.org/10.3390/s21227482

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