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Behringer M, Link TW, Montag JC, et al. Are Electrically Induced Muscle Cramps Able to Increase the Cramp Threshold Frequency, When Induced Once a Week?. Orthop Rev (Pavia). 2015;7(3):6028doi: 10.4081/or.2015.6028.
Behringer, M., Link, T. W., Montag, J. C., McCourt, M. L., & Mester, J. (2015). Are Electrically Induced Muscle Cramps Able to Increase the Cramp Threshold Frequency, When Induced Once a Week?. Orthopedic reviews, 7(3), 6028. https://doi.org/10.4081/or.2015.6028
Behringer, Michael, et al. "Are Electrically Induced Muscle Cramps Able to Increase the Cramp Threshold Frequency, When Induced Once a Week?." Orthopedic reviews vol. 7,3 (2015): 6028. doi: https://doi.org/10.4081/or.2015.6028
Behringer M, Link TW, Montag JC, McCourt ML, Mester J. Are Electrically Induced Muscle Cramps Able to Increase the Cramp Threshold Frequency, When Induced Once a Week?. Orthop Rev (Pavia). 2015 Sep 28;7(3):6028. doi: 10.4081/or.2015.6028. eCollection 2015 Sep 28. PMID: 26605029; PMCID: PMC4592932.
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Orthop Rev (Pavia). 2015 Sep 28;7(3):6028. doi: 10.4081/or.2015.6028. eCollection 2015 Sep 28.

Are Electrically Induced Muscle Cramps Able to Increase the Cramp Threshold Frequency, When Induced Once a Week?.

Orthopedic reviews

Michael Behringer, Tobias Walter Link, Johannes Caspar Konrad Montag, Molly Leigh McCourt, Joachim Mester

Affiliations

  1. Institute for Training Science and Sport Informatics, German Sport University of Cologne , Germany.

PMID: 26605029 PMCID: PMC4592932 DOI: 10.4081/or.2015.6028

Abstract

The cramp threshold frequency (CTF) is known to be positively correlated with the individual cramp susceptibility. Here we assessed CTF changes after two bouts of electrically induced muscle cramps (EIMCs). The EIMCs (6×5 sec) were unilaterally induced twice (separated by one week) in the gastrocnemius of an intervention group (n=8), while 5 participants served as control. The CTF increased from 25.1±4.6 Hz at baseline to 31.4±9.0 Hz and 31.7±8.5 Hz 24 h after bout 1 and 2 (P<0.05). Thereafter, the CTF declined following both bouts to reach values of 28.0±6.7 Hz and 29.1±7.7 Hz after 72 h after bout 1 and 2. Creatine kinase (CK) activity and perceived discomfort during cramps was lower after bout 2 (P<0.05). CTF, CK, and discomfort did not change in CG. That is, a single bout of EIMCs induces a 24 h CTF increment and a second bout sustains this effect, while perceived discomfort and muscle damage decreases. This short term effect may help athletes to reduce the cramp susceptibility for an important match.

Keywords: Electrically induced muscle cramps; cramp threshold frequency; muscle damage; perceived discomfort; repeated bout effect

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