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Completed

NCT Number: NCT07554248

Effects of Low-Intensity Technical Tethered Swimming on Front Crawl Kinematics in Adolescent Swimmers

This study evaluated the acute effects of two low-intensity front crawl training conditions on swimming kinematics in adolescent swimmers. After a standardized warm-up, participants performed either low-intensity tethered front crawl or low-intensity free-swimming front crawl. Kinematic measurements were obtained immediately after task completion using an accelerometer. One week later, the final exercise condition was rotated between groups so that both groups completed both training conditions.

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Key information

Conditions

Swimming Kinematics Front Crawl Technique Swimming Technique

Age range

12 year–14 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Swimming Pool at Koncertowa 4

Warsaw, Masovian Voivodeship, 02-785, Poland

About this study

This study investigated the effects of two low-intensity front crawl training conditions on swimming kinematics in adolescent swimmers. All participants completed the same standardized warm-up protocol. After the warm-up, Group A performed 6 × 10 cycles of low-intensity tethered front crawl with 10-second rest intervals between sets, while Group B performed 6 × 50 m of low-intensity front crawl starting every 60 seconds. During both exercise conditions, participants were instructed to focus on stroke length and correct body position in the water.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Competitive adolescent swimmers from a local sports club
  • Regular swimming training history since approximately 9-10 years of age
  • Current training frequency of approximately 7-8 sessions per week
  • Regular participation in national-level swimming competitions
  • At least 2 years of regular swimming training experience
  • Ability to complete the study procedures, including low-intensity front crawl conditions and accelerometer-based measurement

Exclusion criteria

  • Current injury or musculoskeletal condition preventing participation
  • Failure to meet the required age criteria
  • Less than 2 years of regular swimming training experience
  • Inability to complete the study procedures

Treatment and study plan

Low-Intensity Tethered Front Crawl Swimming

Behavioral

Participants performed 6 × 10 cycles of low-intensity front crawl while tethered, with 10-second rest intervals between sets. During the exercise, participants were instructed to focus on stroke length and correct body position in the water.

Low-Intensity Free Front Crawl Swimming

Behavioral

Participants performed 6 × 50 m of low-intensity front crawl, starting every 60 seconds. During the exercise, participants were instructed to focus on stroke length and correct body position in the water.

Primary outcomes

  1. Front Crawl Kinematic Variables Measured by Accelerometer

    Time frame: Baseline and 1 week

    ront crawl kinematic variables were assessed with an accelerometer during each 50 m front crawl trial performed after the assigned exercise condition. Variables included body roll (maximum angular velocity around the vertical axis [ωmaxR] and maximum pelvic tilt angle around the vertical axis [AmaxR]), yaw rotation (maximum angular velocity around the sagittal axis [ωmaxY] and acceleration along the transverse axis [atmax]), pitch rotation (maximum angular velocity around the transverse axis [ωmaxP] and acceleration along the sagittal axis [asmax]), and progressive movement (maximum acceleration along the vertical axis [avmax]).

Secondary outcomes

  1. Time to Achieve 50 m

    Time frame: Baseline and 1 week

    Time required to complete 50 m front crawl, expressed in seconds.

  2. Stroke Length

    Time frame: Baseline and 1 week

    Stroke length during front crawl, expressed in meters.

Sponsors and collaborators

Lead sponsor

Józef Piłsudski University of Physical Education

Other

Registry information

Official study title

Effect of Low-Intensity Technical Tethered Swimming Training on Front Crawl Kinematics in Adolescent Swimmers

Important dates

Study start
2024
Primary completion
2024
Study completion
2024
First posted
Apr 28, 2026
Registry last updated
Apr 28, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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