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Changes in Flexibility and Force are not Different after Static Versus Dynamic Stretching.

Shingo Matsuo1, Masahiro Iwata1,2, Manabu Miyazaki3

  • 1Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan.

Sports Medicine International Open
|October 26, 2019
PubMed
Summary

Static and dynamic stretching both improved range of motion (ROM) and passive torque (PT) while decreasing passive stiffness and isometric muscle force. The study found no significant difference in effects between static and dynamic stretching methods.

Keywords:
muscle forcepassive stiffnesspassive torquerange of motionwarm-up exercise

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Area of Science:

  • Biomechanics
  • Exercise Physiology
  • Sports Medicine

Background:

  • Stretching is commonly used to improve flexibility and performance.
  • Understanding the distinct effects of static versus dynamic stretching is crucial for optimizing training protocols.
  • Previous research has yielded mixed results regarding the comparative efficacy of different stretching modalities.

Purpose of the Study:

  • To compare the acute effects of static stretching versus dynamic stretching on knee flexor range of motion (ROM), passive torque (PT) at pain onset, passive stiffness, and isometric muscle force.
  • To determine if significant differences exist between static and dynamic stretching protocols in these physiological measures.

Main Methods:

  • A randomized crossover trial involving 16 healthy young men.
  • Participants performed 300 seconds of either active static or dynamic stretching of the right knee flexors on separate days.
  • Measurements of ROM, PT at pain onset, passive stiffness, and isometric knee flexion force were taken immediately before and after each stretching session using an isokinetic dynamometer.

Main Results:

  • Both static and dynamic stretching significantly increased ROM and PT at pain onset (p<0.01).
  • Both stretching methods significantly decreased passive stiffness and isometric knee flexion force (p<0.01).
  • No significant differences in the magnitude of change were observed between static and dynamic stretching for any measured variable.

Conclusions:

  • A total of 300 seconds of either static or dynamic stretching can acutely enhance flexibility and reduce passive stiffness.
  • Both stretching techniques lead to a decrease in isometric muscle force.
  • The acute effects of static and dynamic stretching on the measured parameters appear to be comparable.