Research
Print page Print page
Switch language
The Capital Region of Denmark - a part of Copenhagen University Hospital
Published

Medio-Lateral Hamstring Muscle Activity in Unilateral vs. Bilateral Strength Exercises in Female Team Handball Players - A Cross-Sectional Study

Research output: Contribution to journalJournal articleResearchpeer-review

DOI

  1. Cross-sectional Study of EMG and EMG Rise During Fast and Slow Hamstring Exercises

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. To Reconstruct the Anterior Cruciate Ligament or Not? - Put into Panther Perspective

    Research output: Contribution to journalEditorialResearchpeer-review

  3. Screening to Detect Hip and Groin Problems in Elite Adolescent Football (Soccer) Players - Friend or Foe?

    Research output: Contribution to journalJournal articleResearchpeer-review

  4. Shoulder Rotational Strength Profiles of Danish National Level Badminton Players

    Research output: Contribution to journalJournal articleResearchpeer-review

  5. Sports Physiotherapy for All

    Research output: Contribution to journalEditorialResearchpeer-review

  1. Intra-day and Inter-day reliability and validity of the Reactive Strength Index derived from unilateral drop jumps measured on the My Jump 2 app and a force platform

    Research output: Contribution to conferenceConference abstract for conferenceResearchpeer-review

  2. Response to Letter-to-Editor by Lixandrão et al. published in Scand. J. Med. Sci. Sports 31(2), 489-492, 2021

    Research output: Contribution to journalLetterResearchpeer-review

  3. Hamstring and Quadriceps Muscle Strength in Youth to Senior Elite Soccer: A Cross-Sectional Study Including 125 Players

    Research output: Contribution to journalJournal articleResearchpeer-review

  4. Cross-sectional Study of EMG and EMG Rise During Fast and Slow Hamstring Exercises

    Research output: Contribution to journalJournal articleResearchpeer-review

View graph of relations

Background Reduced activation of the hamstring muscles and specifically the medial semitendinosus muscle (ST) has been shown to be a risk factor for non-contact anterior cruciate ligament (ACL) injury. Specific hamstring strength exercises may show high ST activity, however the effect of unilateral vs. bilateral exercise execution on ST activation remains unknown. Purpose To investigate selected lower limb strengthening exercises performed either unilaterally or bilaterally to identify 1) which exercise elicited the highest hamstring activation, 2) which exercise elicited the highest ST activation, and 3) to examine if unilateral exercise execution altered the medio-lateral hamstring activation pattern. Furthermore, the kinematic characteristics of each specific exercise and execution modality were determined to reveal possible causes for differences in medio-lateral hamstring activation between the different exercise conditions. Study design Cross-sectional study. Methods Single-session repeated measures were obtained in a randomized manner. Twenty-three female elite team handball players were recruited. Hamstring electromyographic (EMG) activity and 3D kinematics were obtained during selected lower limb exercises (hip thrust, kettlebell swing, Romanian deadlift). Hamstring EMG activity, normalized to maximal voluntary contraction (MVC) (nEMG), and inter-muscular activation difference between the ST and lateral hamstring biceps femoris (BF) were compared across exercises using two-way repeated measures ANOVA. Results Bilateral hip thrust demonstrated highest overall hamstring activity (68.9±16.6 %). Kettlebell swing (Δ13%-point, p<0.01) and Romanian deadlift (Δ20-24%-point, p<0.01) demonstrated greater ST-BF activation differences (Δ=ST-BF) in favor of ST compared to hip thrust (Δ2-7%). Positive correlations were observed between knee joint angle and ST activity in kettlebell swing and deadlift. Conclusion Kettlebell swing, deadlift and hip thrust all produced high activation of the hamstring muscles. Kettlebell swing and both deadlift exercises were superior in activating ST over BF, favoring these exercises in the prevention of non-contact ACL injury in female athletes, which should be evaluated in future intervention studies.

Original languageEnglish
JournalInternational journal of sports physical therapy
Volume16
Issue number3
Pages (from-to)704-714
Number of pages11
ISSN2159-2896
DOIs
Publication statusPublished - 1 Jun 2021

    Research areas

  • emg, exercise, hamstrings, medio-lateral activation, strength, Hamstrings, Exercise, Medio-lateral activation, Emg, Strength

ID: 66308877