Study aim: The aim of the study was to investigate the variability and symmetry of upper limb physiological tremor in elite sport dancers under simulated competitive conditions. Material and methods: Eighteen elite dancers (9 males, 9 females; age:16.1 ± 2.3 years; training experience: 8 ± 2.1 years; body mass: 62.0 ± 10.4 kg; height: 169.8 ± 7.9cm) all members national team and finalists in Polish championship, participated in the study. The experimental protocol involved a two-phase simulated competition, during which participants performed five standard dances in both semifinal and final rounds. Tremor signals were recorded before and after simulation using tri-axial accelerometry in a standardized postural postition. Frequency-domain analysis was conducted to extract tremor amplitude (L) and frequency (F) in two specific bands: 2–5 Hz and 9–14 Hz. Repeated measures ANOVA was used to analyze the effects of condition (pre vs. post), limb side, and gender. Results: Post-simulation tremor amplitude in the 9–14 Hz range increased significantly ( p = 0.0003; η _p ² = 0.60), suggesting the presence of neuromuscular fatigue and possible increased recruitment of fast-twitch muscle fibers. A significant interaction between limb side and gender (p = 0.006; η _p ² = 0.384) revealed asymmetrical tremor only in male participants, with higher post-exercise values in the dominant arm. Conclusions: Physiological tremor may serve as a low-cost, non-invasive biomarker of neuromuscular fatigue and motor asymmetry in competitive dance. Its application could support individualized training monitoring, optimize fatigue management, and injury prevention strategies in sports requiring high motor precision.

This meta-analysis investigates the acute (immediate) pre–post changes in the modulation of physiological tremor in healthy adults following physical exercise, including resistance-based protocols. Physiological tremor is characterized by low-amplitude, high-frequency oscillations during posture or movement and reflects transient changes in neuromuscular control. Background/Objectives: Quantify the pooled effect of physical exercise on physiological tremor amplitude in healthy adults using magnitude-based metrics (RMS, peak power). A secondary objective was to synthesize evidence from acute resistance-based protocols separately. Methods: This meta-analysis was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA 2020) guidelines and followed the methodological framework outlined in the Cochrane Handbook for Systematic Reviews of Interventions. Thirteen experimental studies met the inclusion criteria, with eleven included in the general exercise analysis and eight in the acute resistance-based subset. Results: Random-effects models revealed a moderate reduction in tremor amplitude following acute exercise (Hedges’ g = −0.42, p < 0.001). The resistance-based synthesis was restricted to acute single-session protocols only and indicated a directionally consistent reduction in tremor amplitude. Conclusions: These findings suggest that physical exertion is associated with transient suppression of physiological tremor amplitude. Acute single-session resistance-based exercise protocols showed a consistent direction of effect, although pooled estimates should be interpreted cautiously due to heterogeneity. Overall, physiological tremor may serve as a sensitive, non-invasive outcome measure reflecting short-term neuromuscular state.

Background: Targeted training interventions, including neuromuscular warm-up protocols, eccentric resistance training, and dynamic stretching exercises, with limited and heterogeneous evidence on recovery strategies, have shown potential benefits for muscle performance and reductions in injury risk. Objective: To synthesize and structure contemporary evidence on exercise-based interventions spanning the pre-activity warm-up through post-activity recovery, emphasizing performance outcomes, injury-related effects, reported dose–response patterns, and implementation characteristics. Methods: This systematic review with structured qualitative synthesis was based on a systematic database search and eligibility screening process (n = 40 studies). Studies evaluating exercise-based interventions targeting injury prevention and/or performance in athletes were included. Data extraction included study design, population characteristics, intervention components, outcomes, and risk-of-bias assessments, which were summarized using comparative tables and descriptive analyses. Due to heterogeneity, results were synthesized qualitatively without meta-analysis. Results: Neuromuscular warm-ups (e.g., FIFA 11+) were frequently linked to reduced reported lower-extremity injury risk, alongside improvements in sprint, jump, and balance performance. Eccentric hamstring training was linked in several studies to lower reported hamstring injury rates and increased eccentric strength and fascicle length, while dynamic warm-ups may acutely improve sprint and jump performance. Evidence regarding recovery modalities was heterogeneous, supporting a cautious and individualized emphasis on sleep, nutrition, and hydration. However, heterogeneity in study designs, outcome measures, and populations limits the comparability and generalizability of the findings. Conclusions: Exercise-based interventions, including neuromuscular warm-ups, eccentric strengthening, dynamic stretching, and progressive load and recovery strategies, may support performance enhancement and injury-risk reduction in youth and adult athletes when appropriately implemented, although interpretation is limited by study heterogeneity.