Transferability of strength gains from limited to full range of motion

Yaron Barak, Moshe Ayalon, Zeevi Dvir

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: This study was aimed at exploring the transferability of short range of motion (RoM) isokinetic conditioning on quadriceps performance inside and outside the trained range. Methods: Fifty-five women were randomly assigned to one of four groups: G1 (N = 14) and G2 (N = 14) trained concentrically at 30 and 90°·s-1, respectively, whereas G3 (N = 13) and G4 (N = 14) trained similarly but using the eccentric mode. All four groups trained within 30-60° of knee flexion. The training paradigm consisted of 4 sets of 10 maximal repetitions, 3 × wk-1 for a total period of 6 wk. Before the training period and 2 d after its termination, the isokinetic work output (Wisk) was assessed within three angular RoM: 85-60° (R1), 60-30° (R2), and 30-5° (R3). Isometric peak extension moment (PM) and rate of force development (RFD) were evaluated at 10°, 45° and 80°. Results: Significant increases were observed in the isometric output (at all three angles), Wisk (in R1 and R2), and the RFD (45°). The PM increased significantly more in G3 and G4 compared with G1 and G2, evidencing specificity of contraction mode. Conclusion: These findings point out to the potential benefits of short RoM conditioning, particularly in those cases where, during specific phases of rehabilitation, a wider RoM may be contraindicative.

Original languageEnglish
Pages (from-to)1413-1420
Number of pages8
JournalMedicine and Science in Sports and Exercise
Volume36
Issue number8
DOIs
StatePublished - Aug 2004

Keywords

  • Comperative study
  • Isokinetics
  • Rehabilitation
  • Restricted RoM

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