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An acute bout of static stretching does not affect maximal eccentric isokinetic peak torque, the joint angle at peak torque, mean power, electromyography, or mechanomyography.
J Orthop Sports Phys Ther. 2007 Mar; 37(3):130-9.JO

Abstract

STUDY DESIGN

Repeated-measures experimental design.

OBJECTIVE

To examine the acute effects of static stretching on peak torque, the joint angle at peak torque, mean power output, and electromyographic and mechanomyographic amplitudes and mean power frequency of the vastus lateralis and rectus femoris muscles during maximal eccentric isokinetic muscle actions.

BACKGROUND

A bout of static stretching may impair muscle strength during isometric and concentric muscle actions, but it is unclear how static stretching may affect eccentric force production.

METHODS AND MEASURES

Fifteen men (mean +/- SD age, 23.4 +/- 2.4 years) performed maximal eccentric isokinetic muscle actions of the dominant and nondominant knee extensor muscles at 60 degrees x s(-1) and 180 degrees x s(-1) on an isokinetic dynamometer, while electromyographic and mechanomyographic amplitudes (root-mean-square) and mean power frequency were calculated for the vastus lateralis and rectus femoris muscles. Peak torque (Nm), the joint angle at peak torque (degrees), and mean power output (W) values were recorded by the dynamometer. Subsequently, the dominant lower extremity knee extensors underwent static stretching exercises, then the assessments were repeated.

RESULTS

There were no stretching-related changes in peak torque, the joint angle at peak torque, mean power output, electromyographic or mechanomyographic amplitude, or mean power frequency (P > .05). However, there were expected velocity-related, limb-related, and muscle-related differences (P < or = .05) that were unrelated to the stretching intervention.

CONCLUSION

These results suggest that static stretching does not affect maximal eccentric isokinetic torque or power production, nor does it change muscle activation.

Authors+Show Affiliations

Department of Health and Exercise Science, University of Oklahoma, Norman, OK 73019-6081, USA. jcramer@ou.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17416128

Citation

Cramer, Joel T., et al. "An Acute Bout of Static Stretching Does Not Affect Maximal Eccentric Isokinetic Peak Torque, the Joint Angle at Peak Torque, Mean Power, Electromyography, or Mechanomyography." The Journal of Orthopaedic and Sports Physical Therapy, vol. 37, no. 3, 2007, pp. 130-9.
Cramer JT, Housh TJ, Johnson GO, et al. An acute bout of static stretching does not affect maximal eccentric isokinetic peak torque, the joint angle at peak torque, mean power, electromyography, or mechanomyography. J Orthop Sports Phys Ther. 2007;37(3):130-9.
Cramer, J. T., Housh, T. J., Johnson, G. O., Weir, J. P., Beck, T. W., & Coburn, J. W. (2007). An acute bout of static stretching does not affect maximal eccentric isokinetic peak torque, the joint angle at peak torque, mean power, electromyography, or mechanomyography. The Journal of Orthopaedic and Sports Physical Therapy, 37(3), 130-9.
Cramer JT, et al. An Acute Bout of Static Stretching Does Not Affect Maximal Eccentric Isokinetic Peak Torque, the Joint Angle at Peak Torque, Mean Power, Electromyography, or Mechanomyography. J Orthop Sports Phys Ther. 2007;37(3):130-9. PubMed PMID: 17416128.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - An acute bout of static stretching does not affect maximal eccentric isokinetic peak torque, the joint angle at peak torque, mean power, electromyography, or mechanomyography. AU - Cramer,Joel T, AU - Housh,Terry J, AU - Johnson,Glen O, AU - Weir,Joseph P, AU - Beck,Travis W, AU - Coburn,Jared W, PY - 2007/4/10/pubmed PY - 2007/6/21/medline PY - 2007/4/10/entrez SP - 130 EP - 9 JF - The Journal of orthopaedic and sports physical therapy JO - J Orthop Sports Phys Ther VL - 37 IS - 3 N2 - STUDY DESIGN: Repeated-measures experimental design. OBJECTIVE: To examine the acute effects of static stretching on peak torque, the joint angle at peak torque, mean power output, and electromyographic and mechanomyographic amplitudes and mean power frequency of the vastus lateralis and rectus femoris muscles during maximal eccentric isokinetic muscle actions. BACKGROUND: A bout of static stretching may impair muscle strength during isometric and concentric muscle actions, but it is unclear how static stretching may affect eccentric force production. METHODS AND MEASURES: Fifteen men (mean +/- SD age, 23.4 +/- 2.4 years) performed maximal eccentric isokinetic muscle actions of the dominant and nondominant knee extensor muscles at 60 degrees x s(-1) and 180 degrees x s(-1) on an isokinetic dynamometer, while electromyographic and mechanomyographic amplitudes (root-mean-square) and mean power frequency were calculated for the vastus lateralis and rectus femoris muscles. Peak torque (Nm), the joint angle at peak torque (degrees), and mean power output (W) values were recorded by the dynamometer. Subsequently, the dominant lower extremity knee extensors underwent static stretching exercises, then the assessments were repeated. RESULTS: There were no stretching-related changes in peak torque, the joint angle at peak torque, mean power output, electromyographic or mechanomyographic amplitude, or mean power frequency (P > .05). However, there were expected velocity-related, limb-related, and muscle-related differences (P < or = .05) that were unrelated to the stretching intervention. CONCLUSION: These results suggest that static stretching does not affect maximal eccentric isokinetic torque or power production, nor does it change muscle activation. SN - 0190-6011 UR - https://www.unboundmedicine.com/medline/citation/17416128/An_acute_bout_of_static_stretching_does_not_affect_maximal_eccentric_isokinetic_peak_torque_the_joint_angle_at_peak_torque_mean_power_electromyography_or_mechanomyography_ DB - PRIME DP - Unbound Medicine ER -