Characterization of Muscle Activation and Muscle Synergism in the ‘Forward Lunge’ Gait Movement of Badminton Players Using Surface Electromyography Sensors

Sensors, Journal Year: 2025, Volume and Issue: 25(6), P. 1644 - 1644

Published: March 7, 2025

The ‘forward lunge’ is a crucial movement in badminton that demands effective muscle activation and coordination. This study compared the patterns of professional amateur male players during this movement. A total 24 (12 professionals 12 amateurs) participated, with surface electromyography (sEMG) used to measure activity muscles on right side lunge. was divided into swing support phases based ground reaction force data. sEMG signals were analyzed using integral EMG (iEMG) root-mean-square (RMS) amplitude, synergy extracted via non-negative matrix factorization (NNMF) k-means clustering. results showed significantly higher iEMG RMS values such as gastrocnemius, biceps femoris, gluteus maximus, external oblique, latissimus dorsi (p < 0.05), while no significant differences observed tibialis anterior, vastus medialis, lateralis, deltoideus, biceps, soleus muscles. Muscle analysis revealed three group, two group. additional pattern involved greater recruitment lower limb core muscles, especially phase. In contrast, group earlier but exhibited less efficient These findings suggest coordination forward lunge are influenced by playing level, highlighting importance training for athletes optimize performance reduce injury risk.

Language: Английский

The Impact of Normalization Procedures on Surface Electromyography (sEMG) Data Integrity: A Study of Bicep and Tricep Muscle Signal Analysis

Sensors, Journal Year: 2025, Volume and Issue: 25(9), P. 2668 - 2668

Published: April 23, 2025

Surface electromyography (sEMG) is a critical tool for quantifying muscle activity and inferring biomechanical function, enabling the detection of neuromuscular deficits through analysis electrical potential propagation. However, inherent variability in sEMG signal amplitude, influenced by factors such as electrode placement, equipment characteristics, individual physiology, necessitates robust normalization techniques accurate comparative analysis. This study investigates reliability effectiveness several methods context bicep tricep activation during dynamic isometric exercises: maximum voluntary contraction (MVC), submaximal (SMVC), remote (RVC), mean, peak normalization. We conducted comprehensive experimental protocol involving healthy volunteers, capturing signals controlled curls, extensions, contractions. The efficacy each method was evaluated based on its ability to minimize inter-subject enhance consistency. Specifically, while SMVC, MVC, RVC exhibited generally superior performance normalizing signals, optimal varied depending task muscle, providing consistent reliable data These results underscore importance selecting appropriate improve accuracy sEMG-based assessments clinical sports biomechanics, contributing development more effective rehabilitation protocols enhancement strategies.

Language: Английский

Exercise, Nutrition, and Neuromuscular Electrical Stimulation for Sarcopenic Obesity: A Systematic Review and Meta-Analysis of Management in Middle-Aged and Older Adults

Nutrients, Journal Year: 2025, Volume and Issue: 17(9), P. 1504 - 1504

Published: April 29, 2025

Background/Objective: Sarcopenic obesity (SO), a pathological syndrome characterized by the co-existence of diminished muscle mass and excessive adipose accumulation, significantly compromises quality life in older adults. The purpose this study was to systematically evaluate efficacy exercise, nutritional interventions, neuromuscular electrical stimulation (NMES) preventing managing SO middle-aged Methods: A comprehensive search conducted across PubMed, Web Science, Embase, Cochrane Library, CNKI for randomized controlled trials (RCTs) until January 2025. Meta-analyses were performed using random-effects model fixed-effects based on degree heterogeneity calculating mean differences (MD) with 95% confidence intervals (CI). Subgroup analyses compared intervention types. Results: Twenty-nine RCTs (1622 participants) included. Exercise interventions reduced body fat percentage (MD = −2.79%, CI: −3.94, −1.64, p < 0.001, I2 74%), −6.77 kg, −11.48, −2.06, 0.005, 98%), waist circumference −2.05 cm, −3.64, −0.46, 0.01, 0%) LDL-C (MD: −7.45 mg/dL, −13.82, −1.07, 0.02, 0%), while improving handgrip strength 2.35 1.99, 2.70, 52%) gait speed 0.19 m/s, 0.13, 0.24, 89%). Mixed training outperformed resistance-only regimens reducing enhancing functional outcomes. NMES −2.01%, −3.54, −0.48, 93%) −1.72 −2.35, −1.09, increasing Skeletal Muscle Index 0.26 kg/m2, 0.22, 0.29, 38%). Synergy supplementation amplified these effects. Nutritional modestly improved total fat-free 0.77 0.04, 1.50, 1.35 0.71, 2.00, but showed no significant impact metabolic markers (TG, TC, glucose, hemoglobin, HOMA-IR). Conclusions: Exercise, particularly multimodal combining aerobic resistance training, is cornerstone composition physical function SO. serves as an effective adjunct accelerating loss, strategies require integration exercise or prolonged implementation yield clinically meaningful Future research should prioritize standardized diagnostic criteria long-term assessments interventions.

Language: Английский