AI Article Synopsis
- This study examined how different frequencies of neuromuscular electrical stimulation (NMES) affect the quadriceps femoris muscles in a group of 30 young adults.
- Participants were tested under three conditions: maximum voluntary isometric contraction (MVIC), MVIC with medium frequency (MVIC-MF), and MVIC with low frequency (MVIC-LF), with specific resting times between tests.
- Results showed that MVIC-MF led to higher peak torque compared to MVIC-LF, indicating it was the most effective NMES option for strengthening the quadriceps.
Article Abstract
Objective: The purpose of this study was to investigate the effects of neuromuscular electrical stimulation (NMES) in different frequencies on the quadriceps femoris. A randomized, controlled, blind cross-sectional study.
Methods: Thirty subjects (12 men and 18 women), with an average age of 24.67 years, weight of 65.62 kg and height of 1.69 m were evaluated. Three random test conditions were applied: maximum voluntary isometric contraction (MVIC), maximum voluntary isometric contraction with medium frequency current (MVIC-MF) and maximum voluntary isometric contraction with low frequency current (MVIC-LF). Four MVICs were applied in each situation. The time between different isometric contraction types was 90 seconds while the time between the same conditions of contraction was 10 seconds.
Results: Two-way ANOVA test showed that MVIC-MF had higher values for peak torque than MVIC-LF (p=0.02). Significant statistical results were found when comparing MVIC-MF and MVIC (p=0.03), but not for MVIC and MVIC-LF (p=0.52).
Conclusion: Maximum voluntary isometric contraction associated with medium-frequency electrical stimulation was more effective than other NMES conditions.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6220661 | PMC |
| http://dx.doi.org/10.1590/1413-785220182605178164 | DOI Listing |
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