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Phys Ther Sport. 2011 Aug;12(3):117-21. doi: 10.1016/j.ptsp.2011.04.003. Epub 2011 Jun 2.

Uninvolved versus target muscle contraction during contract: relax proprioceptive neuromuscular facilitation stretching.

Author information

1
Pontifícia Universidade Católica de Minas Gerais, Department of Physical Therapy, Belo Horizonte, MG, Brazil. danielazevedo@pucminas.br

Abstract

OBJECTIVE:

The purpose of this study was to compare the acute effect of the contract-relax (CR) stretching technique on knee active range of motion (ROM) using target muscle contraction or an uninvolved muscle contraction.

DESIGN:

pre-test post-test control experimental design.

SETTING:

Clinical research laboratory.

PARTICIPANTS:

Sixty healthy men were randomly assigned to one of three groups.

INTERVENTIONS:

The Contract-Relax group (CR) performed a traditional hamstring CR stretch, the Modified Contract-Relax group (MCR) performed hamstring CR stretching using contraction of an uninvolved muscle distant from the target muscle, and the Control group (CG) did not stretch.

MAIN OUTCOME MEASURES:

Active knee extension test was performed before and after the stretching procedure.

RESULTS:

Two-way between-within analysis of variance (ANOVA) results showed a significant interaction between group and pre-test to post-test (p < 0.001). Post-hoc examination of individual groups showed no significant change in ROM for the CG (0.8°, p = 0.084), and a significant moderate increase in ROM for both the CR (7.0°, p < 0.001) and MCR (7.0°, p < 0.001) groups.

CONCLUSIONS:

ROM gain following a CR PNF procedure is the same whether the target stretching muscle is contracted, or an uninvolved muscle is contracted.

PMID:
21802037
DOI:
10.1016/j.ptsp.2011.04.003
[Indexed for MEDLINE]

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