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Abstract
BACKGROUND: To investigate if the cramp threshold frequency (CTF) can be altered by electrical muscle stimulation in a shortened position.
METHODS: A total of 15 healthy male sport students were randomly allocated to an intervention (IG, n = 10) and a non-treatment control group (CG, n = 5). Calf muscles of both legs in the IG were stimulated equally twice a week over 6 weeks. The protocol was 3×5 s on, 10 s off, 150 µs impulse width, 30 Hz above the individual CTF, and was at 85% of the maximal tolerated stimulation energy. One leg was stimulated in a shortened position, inducing muscle cramps (CT), while the opposite leg was fixated in a neutral position at the ankle, hindering muscle cramps (nCT). CTF tests were performed prior to the first and 96 h after the 6(th) (3 w) and 12(th) (6 w) training session.
RESULTS: After 3 w, the CTF had significantly (p<0.001) increased in CT calves from 23.3±5.7 Hz to 33.3±6.9 Hz, while it remained unchanged in nCT (pre: 23.6±5.7 Hz, mid: 22.3±3.5 Hz) and in both legs of the CG (pre: 21.8±3.2 Hz, mid: 22.0±2.7 Hz). Only CT saw further insignificant increases in the CTF. The applied stimulation energy (mA² • µs) positively correlated with the effect on the CTF (r = 0.92; p<0.001).
CONCLUSIONS: The present study may be useful for developing new non-pharmacological strategies to reduce cramp susceptibility.
TRIAL REGISTRY: German Clinical Trials Register DRKS00005312.
Original language | English |
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Journal | PloS one |
Volume | 9 |
Issue number | 4 |
Pages (from-to) | e94910 |
Number of pages | 7 |
ISSN | 1932-6203 |
DOIs | |
Publication status | Published - 01.01.2014 |
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Dive into the research topics of 'A promising approach to effectively reduce cramp susceptibility in human muscles: a randomized, controlled clinical trial'. Together they form a unique fingerprint.Projects
- 1 Finished
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Muscle cramp prevention: A promising approach to prevent skeletal muscle cramps
Behringer, M., Spieth, V., Link, T., Montag, J. C. K. & Mester, J.
01.01.13 → 31.12.15
Project: University funding programs
Press/Media
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Studie soll Klarheit über die Krampfschwelle von Muskeln bringen
08.09.14
1 item of Media coverage
Press/Media