Isometric Muscle Strength, Jumping Performance, Performance Measures, Weightlifting
Conditions
Brief summary
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.
Detailed description
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)
Interventions
OTHERIsometric start position pull (ISPP)
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.
OTHERVertical impulse
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.
OTHERPerformance
Performance indicators will be obtained from official competition records, extracting the best valid loads in Snatch (SN), Clean & Jerk (CJ), and Total (TOT)
Sponsors
Ángel Rodríguez
Study design
Observational model
OTHER
Time perspective
CROSS_SECTIONAL
Eligibility
Sex/Gender
ALL
Age
13 Years to 23 Years
Healthy volunteers
Yes
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.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Isometric start position pull (ISPP) | <5 minutes | The participants' force production capacity will be assessed. The test will be conducted on a force platform |
| Vertical impulse | <5 minutes | A force platform will be used to measure the lower-limbs vertical impulse during a The Deep Squat Jump (DSJ) |
| Performance | <1 minutes | The final placement of each athlete in their category |
Countries
Mexico
Outcome results
None listed