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NCT Number: NCT07277335

Neuromuscular Variables and Performance in Mexican Weightlifters

This study aims to determine whether, within each weight and sex category, higher isometric pull force or greater vertical jump impulse is associated with better final placement in the competition.

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Key information

Conditions

Isometric Muscle Strength Jumping Performance Performance Measures Weightlifting

Age range

13 year–23 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Hotel María Dolores

San Luis Potosí City, San Luis Potosí, 78390, Mexico

Location status: Recruiting

Location contact

Leoncio Moreno Leoncio, Event Coordinator

CONTACT

[email protected]

8124066707

About this study

This cross-sectional observational study will be conducted during the 2025 "El Pavo" National Tournament, held in San Luis Potosí, Mexico, with athletes officially registered with the Mexican Weightlifting Federation (FMLP). Vertical jump impulse will be assessed using the Deep Squat Jump (DSJ) approximately two hours after each athlete's last valid attempt, followed by the Isometric Pull Start Position (IPSP) test to measure isometric pull force. Competitive performance data-best Snatch (SN), Clean & Jerk (CJ), and Total (TOT)-will be obtained from official competition records, along with the athlete's final placement within their sex and body mass category.

The study will analyze athletes from two age groups (U-15 and Over-18) and both sexes, selecting one light and one heavy body mass division per group. The included divisions are: U-15, Female: -44 kg (light), -63 kg (heavy) and Male: -56 kg (light), -79 kg (heavy); Over-20, Female: -53 kg (light), -77 kg (heavy) and Male: -65 kg (light), -94 kg (heavy)

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • Weightlifters younger than 15 years old and older than 18 years old (up to 23 years), registered to compete in the 2025 "El Pavo" National Tournament with no declared health issues.

Exclusion criteria

  • Weightlifters registered for the 2025 "El Pavo" National Tournament who present any declared health issues.

Treatment and study plan

Isometric start position pull (ISPP)

Other

The participants' force production capacity will be assessed. The test will be conducted on a force platform. Each athlete will perform general and specific warm-up and familiarization with three isometric attempts with CJ grip (~50%, 80% and 100% perceived effort). For measurement, each participant will execute two 3-s maximum attempts with CJ grip, with 1 minute rest between efforts.

Vertical impulse

Other

A force platform will be used to measure the lower-limbs vertical impulse during a The Deep Squat Jump (DSJ). Participants will execute the DSJ without any countermovement, ensuring maintenance of the full squat position for 3-4 seconds before takeoff to avoid any contribution from elastic energy storage.

Performance

Other

Performance indicators will be obtained from official competition records, extracting the best valid loads in Snatch (SN), Clean & Jerk (CJ), and Total (TOT)

Primary outcomes

  1. Isometric start position pull (ISPP)

    Time frame: <5 minutes

    The participants' force production capacity will be assessed. The test will be conducted on a force platform

  2. Vertical impulse

    Time frame: <5 minutes

    A force platform will be used to measure the lower-limbs vertical impulse during a The Deep Squat Jump (DSJ)

  3. Performance

    Time frame: <1 minutes

    The final placement of each athlete in their category

Sponsors and collaborators

Lead sponsor

Ángel Rodríguez

Network

Registry information

Official study title

Association Between Neuromuscular Variables and Competitive Performance in Weightlifting: an Observational Study With Mexican Athletes [The Kraft Project]

Acronym: KRAFT

Important dates

Study start
2025
Primary completion
2025
Study completion
2025
First posted
Dec 11, 2025
Registry last updated
Dec 11, 2025

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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