The Load-Velocity Slope Is an Indicator of the Active Drag in All Competitive Swimming Strokes.

Introduction: Active drag in swimming is a critical variable that affects swimmers' performance, as well as the physiological load, but it is challenging for practitioners to assess this variable. This study aimed to assess if the load-velocity profiling method can be used as an indicator of active drag.

Methods: A total of 419 swimmers performed three semitethered swimming trials in their speciality among the four competitive strokes with different external loads.

The relationship between load-velocity profiles and 50 m breaststroke performance in national-level male swimmers.

This study investigated the relationships between load-velocity profiling and 50 m breaststroke performance. Twenty-seven male swimmers qualified for the national championship participated and performed a 50 m breaststroke trial with a multicamera system. The total race time (t), forward velocity during surface swimming (v), stroke length, and stroke frequency were obtained from the automatic post-processing of the system.

Lower and upper extremity contributions to propulsion and resistance during semi-tethered load-velocity profiling in front crawl swimming.

The study estimated lower and upper extremity contributions to whole-body front crawl swimming using semi-tethered load-velocity profiling. Nine female and 11 male (inter)national-level swimmers performed 20 m semi-tethered sprints, each with five progressive loads for lower (leg kicking), upper (arm stroke), and whole-body front crawl movements. The theoretical maximal speed (v) and load (L), and active drag (D) were expressed as a percentage of the sum of both extremities for the movements of each extremity to calculate their contributions.

Reliability of a semi-tethered front crawl sprint performance test in adolescent swimmers.

This study aimed to evaluate the test-retest reliability of a sprint performance test with semi-tethered front crawl swimming to indirectly assess the current potential to perform at maximal anaerobic effort in adolescent swimmers. Eight adolescent swimmers participated in this study (gender: females (n = 4) aged 13.0 ± 0.

Load-Velocity Profile and Active Drag in Young Female Swimmers: An Age-Group Comparison.

Purpose: The present study aimed to establish differences in load-velocity profiling, active drag (AD), and drag coefficient (Cd) between 3 age groups of female swimmers.

Methods: Thirty-three swimmers (11, 13, or 16 y old) were recruited. The individual load-velocity profile was determined for the 4 competitive swimming strokes.