Cross-education effect after unilateral eccentric-only isokinetic vs dynamic constant external resistance training

Giuseppe Coratella, Chiara Milanese, Federico Schena

Research output: Contribution to journalArticlepeer-review

Abstract

The aim of this study was to evaluate the effects of unilateral eccentric training using constant velocity or constant external load on untrained limb. Forty-nine participants were randomized in isokinetic (IK), dynamic constant external resistance (DCER) unilateral eccentric training or control groups. Knee-extension 1RM and isometric, eccentric and concentric knee extensors’ peak torques, as well as changes in vastus lateralis muscle thickness, fascicle length, pennation angle and quadriceps fat-free mass were measured. After training, both IK and DCER similarly increased over time 1RM (respectively, +3.6 kg, CI 95 % 0.6–6.5 and +4.3 kg, CI 95 % 1.6–6.9), concentric (respectively, +8.4 N/m, CI 95 % 0.0 to +16.4 and 9.8 CI 95 % 0.6–19.2), eccentric (respectively, +28.5 N/m, CI 95 % 11.0 to +46.0 and 21.1 CI 95 % 15.1–37.0), and isometric (respectively, +15.4 N/m, CI 95 % 0.7–30.0 and +13.9, CI 95 % 0.3–27.5) peak torques. No increase was found for vastus lateralis muscle thickness, fascicle length, pennation angle and quadriceps fat-free mass. Eccentric training was effective for inducing strength, but not structural, adaptations in untrained limb. Both in rehabilitation and training practice, use of easily available gym devices can be a good substitute for expensive and often unavailable isokinetic devices.

Original languageEnglish
Pages (from-to)329-335
Number of pages7
JournalSport Sciences for Health
Volume11
Issue number3
DOIs
Publication statusPublished - Dec 1 2015

Keywords

  • Contra-lateral training
  • Maximal voluntary contraction
  • Quadriceps
  • Untrained limb
  • Vastus lateralis

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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