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Randomized Controlled Trial
. 2024 Jan 25;19(1):e0297136.
doi: 10.1371/journal.pone.0297136. eCollection 2024.

Effect of Russian current expert modes on quadriceps muscle torque in healthy adults: A single-blinded randomized controlled trial

Ansam Hasan  1 , Ibrahim Moustafa  1   2   3 , Tamer Shousha  1   2   4   5   6
Affiliations
Randomized Controlled Trial

Effect of Russian current expert modes on quadriceps muscle torque in healthy adults: A single-blinded randomized controlled trial

Ansam Hasan et al. PLoS One. .

Abstract

Background: Russian current (RC), a well-known neuromuscular electrical stimulation operating at 2500 Hz, has demonstrated significant strength improvement over traditional exercises due to its high tolerance and low pain provocation. Despite extensive NMES parameter research, the specific effects of expert modes, particularly ON2 and Rest, remain unexplored. This study investigates the direct effect of these expert modes on quadriceps muscle strength in healthy adults.

Methods: This is a single-blind, randomization-controlled trial. Forty-eight healthy university students (31 females, 17 males) were assigned in two randomized experimental groups either the ON2 or Rest mode for a 15-minute electrical stimulation session. Quadriceps maximum voluntary isokinetic contraction measurements were taken before and directly after RC application using Biodex Medical Systems 4 pro isokinetic dynamometer.

Results: Both RC modes significantly increased the quadriceps muscle torque in healthy adults compared to baseline (p<0.05). Baseline mean torque was 123.28 (SD = 38.8), and post- RC mean torque was 136.67 (SD = 45.76). Deviation from normality was observed at baseline (p = 0.034) and persisted post-RC application (p = 0.017). The Wilcoxon test reported significant increases in quadriceps muscle knee torque for both ON2 and Rest groups (p < 0.001). The lack of ties in ranks and negative Z-values highlight the robustness of the observed effects.

Conclusion: The findings of this study align with previous research on NMES and RC supporting the idea that electrical stimulation enhances muscle strength, selecting the appropriate RC expert modes can assist physiotherapist in tailoring rehabilitation program to achieve their specific strength goals.

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Conflict of interest statement

The authors have declared that no competing interests exist

Figures

Fig 1
Fig 1. Flow chart of the RC study.
Fig 2
Fig 2. Quadriceps muscle knee torque measurements at the baseline.
Fig 3
Fig 3. The quadriceps muscle knee torque measurement’s directly after the application of the RC expert modes.
See this image and copyright information in PMC

References

    1. Currier DP, Mann R. Muscular strength development by electrical stimulation in healthy individuals. Phys Ther. 1983. Jun;63(6):915–21. doi: 10.1093/ptj/63.6.915 . - DOI - PubMed
    1. Kubiak RJ, Whitman KM, Johnston RM. Changes in quadriceps femoris muscle strength using isometric exercise versus electrical stimulation. J Orthop Sports Phys Ther. 1987;8(11):537–41. doi: 10.2519/jospt.1987.8.11.537 . - DOI - PubMed
    1. Laughman RK, Youdas JW, Garrett TR, Chao EY. Strength changes in the normal quadriceps femoris muscle as a result of electrical stimulation. Phys Ther. 1983. Apr;63(4):494–9. doi: 10.1093/ptj/63.4.494 . - DOI - PubMed
    1. Glaviano N. R., & Saliba S. (2016). Can the Use of Neuromuscular Electrical Stimulation Be Improved to Optimize Quadriceps Strengthening?. Sports health, 8(1), 79–85. doi: 10.1177/1941738115618174 - DOI - PMC - PubMed
    1. Stevens-Lapsley JE, Balter JE, Wolfe P, et al.. Relationship between intensity of quadriceps muscle neuromuscular electrical stimulation and strength recovery after total knee arthroplasty. Phys Ther. 2012;92:1187–1196. (2012). Physical Therapy, 92(10), 1362. doi: 10.2522/ptj.20110479 - DOI - PMC - PubMed

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