Preliminary Dominant-side 2D Key-event Joint-angle Descriptors Across Five Phases of the Badminton Overhead Smash in Elite Colombian Players: a Cross-sectional Exploratory Case Series
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 4
- 试验地点
- 1
- 主要终点
- 2D sagittal-plane joint angles at key events during the smash (knee, hip, shoulder, elbow)
研究概览
简要总结
Phase-based descriptions of the badminton overhead smash can support coach-relevant feedback when laboratory motion capture is impractical. This cross-sectional exploratory case series characterises dominant-side, two-dimensional key-event joint-angle configurations (knee, hip, shoulder, elbow) across five phases (preparation, start, acceleration, impact, termination) in elite Colombian players from the Antioquia Badminton League. Athletes performed three maximal-effort smashes; one trial per athlete was selected for analysis using pre-defined visibility criteria, and one key-event frame per phase was digitised in Kinovea. Outcomes are descriptive phase-specific angle values and between-athlete dispersion metrics. The study is retrospectively registered for transparency.
详细描述
Badminton overhead smash performance depends on coordinated whole-body contributions and is often judged qualitatively in applied settings. This study provides a field-based, minimal-equipment description of dominant-side planar joint-angle configurations across five technical phases of the overhead smash using a single lateral high-speed camera. Five elite athletes (men n=4; woman n=1) from the Antioquia Badminton League were recorded at 240 frames·s-¹ during maximal-effort smashes. Phases were defined as preparation (F1), start (F2), acceleration (F3), impact (F4), and termination (F5), with one key-event frame selected per phase. Knee, hip, shoulder, and elbow internal angles were extracted via three-point definitions in Kinovea. Data are reported descriptively (male subgroup as mean±SD and CV%; female case descriptively). The intention is to offer coach-interpretable phase references and to identify phases with higher inter-individual dispersion.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Only
- 时间视角
- Cross Sectional
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •5 years of organised badminton experience
- •Current Antioquia Badminton League affiliation
- •Competitive participation in ≥5 federated tournaments
- •Previous selection to a representative team at least at national level
- •Able to execute maximal-effort overhead smashes on the testing day
排除标准
- •Pain or musculoskeletal complaints affecting upper limb, trunk, or lower limb on the testing day
- •Any condition preventing maximal-effort overhead smashes
研究组 & 干预措施
Elite badminton players (Antioquia)
Elite badminton athletes from the Antioquia Badminton League (Colombia), aged ≥18 years, with >5 years of organised experience, competitive participation in ≥5 federated tournaments, and previous selection to at least national representative level. Participants completed a single testing session involving three maximal-effort overhead smashes recorded with a single lateral high-speed camera for 2D phase-based joint-angle extraction; no interventions were assigned.
结局指标
主要结局
2D sagittal-plane joint angles at key events during the smash (knee, hip, shoulder, elbow)
时间窗: Baseline (Visit 1; up to 30 minutes)
Internal joint angles (degrees) for the knee, hip, shoulder, and elbow computed using three-point (planar) definitions at five pre-defined key-event frames (F1-F5) spanning the smash phases. Angles will be extracted from lateral high-speed video after landmark digitisation in Kinovea using pre-specified anatomical landmarks and segment definitions. Data will be reported as mean (SD) for each joint and key-event frame; larger values indicate more extended joint configurations.
次要结局
- Between-participant variability (SD and CV%) of 2D sagittal-plane joint angles by key-event frame and joint(Baseline (Visit 1; up to 30 minutes))
研究者
Édison Andrés Pérez Bedoya
Principal investigator
Federal University of Vicosa