2D Key-Event Joint Angles Across Phases of the Badminton Overhead Smash in Elite Colombian Players

NCT07442695 | Completed

• 1 other identifier: Badminton-TdeA
• Study Type: observational
• Target: 4
• Locations: 1 country
• Sites: 1

Brief Summary

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.

Conditions

Sports Performance; Biomechanics; Video Information

Keywords

badminton; overhead smash; 2D video analysis; joint angles; technique variability

Outcome Measures

Primary Outcomes (1)

• 2D sagittal-plane joint angles at key events during the smash (knee, hip, shoulder, elbow)

  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.

  Baseline (Visit 1; up to 30 minutes)

Secondary Outcomes (1)

• 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)

Study Arms (1)

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.

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

High-performance adult badminton players from the Antioquia Badminton League (Colombia) with extensive competitive experience, assessed in a single session to describe 2D phase-based overhead smash joint-angle configurations.

You may qualify if:

• 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

You may not qualify if:

• Pain or musculoskeletal complaints affecting upper limb, trunk, or lower limb on the testing day
• Any condition preventing maximal-effort overhead smashes

Sponsors & Collaborators

• Federal University of Vicosa: lead

Study Sites (1)

Tecnológico de Antioquia

Medellín, Antioquia, 054080, Colombia

Location

Study Design

• Study Type: observational
• Observational Model: CASE ONLY
• Time Perspective: CROSS SECTIONAL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Principal investigator

Study Record Dates

• First Submitted: February 23, 2026
• First Posted: March 2, 2026
• Study Start: February 12, 2025
• Primary Completion: February 13, 2025
• Study Completion: February 13, 2025
• Last Updated: March 2, 2026

Record last verified: 2026-02

Data Sharing

• IPD Sharing: Will not share

Locations

CO (1)