Physical characteristics of Olympic trial qualifiers versus non-qualifiers in competitive swimming

High-performance swimming requires specific physical attributes to optimize propulsion and minimize drag. While start, turn, and underwater phases are critical, comprehensive comparisons of physical characteristics between elite and sub-elite swimmers remain limited. This study aimed to investigate whether differences exist in physical characteristics related to performance between high-performance competitive swimmers (Olympic trial qualifiers) and average competitive swimmers.

Thirty-three male competitive swimmers were enrolled in this prospective observational study. Measured variables included vertical jump height, thoracic kyphosis and lumbar lordosis angles in a streamlined position, ankle plantar flexion range of motion assessed by toe-floor distance, and shoulder joint extensor torque in an elevated position. The measurements were taken between March and April 2023. Participants were categorized into a High-performance group (N.=14) comprising athletes who competed in the Paris Olympic selection trials in March 2024, and a Normal group (N.=19) consisting of national age-group level swimmers who did not qualify.

The High-performance group demonstrated significantly greater vertical jump height compared to the Normal group (61.9 vs. 55.1 cm). Additionally, the High-performance group exhibited significantly lower toe-floor distance values (7.3 vs. 8.9 cm), indicating superior ankle plantar flexion flexibility. No significant differences were found between groups regarding spinal alignment angles or shoulder extension strength.

Swimmers qualifying for Olympic trials possess significantly higher vertical jump height and greater ankle plantar flexion range of motion than non-qualifiers. These characteristics appear fundamental for optimizing starts, turns, and underwater undulatory swimming. Consequently, vertical jump height and ankle flexibility may be considered characteristics of elite competitive swimmers.