The effects of 6 weeks eccentric training on Speed, Dynamic Balance, Muscle Strength, Power and Lower Limb Asymmetry in Prepubescent Weightlifters

Raouf Hammami, Michael Duncan, Ammar Negbigh, Hanan Werfelli, Haithem Rebai

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)
    176 Downloads (Pure)


    This study examined whether 6 weeks of twice-weekly in-season hamstring eccentric training would enhance selected performance-related abilities in prepubescent male weightlifters. Twenty elite weightlifters (11.1 ± 0.8 years) were randomly split into an eccentric training intervention group (INT n = 10) or a control group (CON) that maintained their standard in-season regimen (n = 10). Pre-intervention and postintervention speed, dynamic balance, muscle strength, power, and lower limb (LL) asymmetry were assessed. Analysis of covariance controlling for maturation was used to determine any differences in the performance variables. There were no significant changes in muscle strength, dynamic balance, or LL asymmetry (all p < 0.05) because of the intervention. Both 10-m (p = 0.001) and 30-m (p = 0.007) sprint speed and agility (p = 0.049) improved to a greater extent in INT compared with the CON group. Similar results were evident for the standing long jump (p = 0.015) and 3 hop test (p = 0.004) where performance improved to a greater magnitude in INT compared with CON groups. This study suggests that eccentric training, undertaken twice weekly for 6-weeks results in positive changes in sprint speed, change of direction speed, and power performance, but not muscle strength, dynamic balance, or LL asymmetry in prepubertal weightlifters.

    Original languageEnglish
    Pages (from-to)955-962
    Number of pages8
    JournalJournal of Strength and Conditioning Research
    Issue number4
    Early online date28 May 2020
    Publication statusPublished - 1 Apr 2022

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    • Change of direction
    • Horizontal jumps
    • Maturation
    • Resistance exercise
    • Youth

    ASJC Scopus subject areas

    • Orthopedics and Sports Medicine
    • Physical Therapy, Sports Therapy and Rehabilitation


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