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Active, Not Recruiting

NCT Number: NCT06875505

Post-activation Performance Enhancement in Soccer Players:

This study will be conducted in a randomised, crossover design. Soccer players will participate in two test sessions 48 hours apart. The athletes will be pre-tested in the professional direction change test and after the PAPE protocol of the group they are included in is applied, they will be taken to the professional direction change test at 15th second, 3rd, 6th, 9th and 12th minutes.

Active, Not Recruiting

This study is active but is not currently recruiting participants.

Key information

Conditions

Performance Post Activation Potentiation Soccer

Age range

18 year–24 year

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

Primary location

Karabuk University

Karabük, Turkey, 78200, Turkey (Türkiye)

About this study

This study will be conducted in a randomised, crossover design. Subjects will participate in two test sessions 48 hours apart. To eliminate the effect of fatigue, participants will be warned not to engage in intense physical activity before the study days and to pay attention to adequate carbohydrate intake so that repeated sprint performance will not be affected. On the 1st day of the study, after the participants were informed about the study, their heights will be recorded with a height meter, and their weights and body fat percentages will be taken with the Inbody 270 device. After the descriptive characteristics of all participants are obtained, the warm-up protocol will be applied and 1 RM will be determined and recorded by performing knee extension movement on the Knee Extension device. On the second day of the study, all athletes will be pre-tested in the professional change of direction test and will be taken to the professional change of direction test at 15 seconds, 3 minutes, 6 minutes, 9 minutes and 12 minutes after the PAPE protocol of the group they are included in is applied. On the third day of the study, the pre-tests of all athletes in the professional direction change test will be taken again and they will be taken to the professional direction change test at 15 seconds, 3rd, 6th, 9th and 12th minutes after the PAPE protocol of the group they are included in is applied. Participants will be asked to stop eating 1.5 hours before the measurement time. Athletes will be allowed to drink water (500ml) during the test and will be verbally motivated during the professional change of direction test.

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • Being healthy
  • Male soccer players
  • Willing to maintain the intervention for all sessions

Exclusion criteria

  • Under 18 years of age
  • Having a chronic disease
  • Contraindications for exercise

Treatment and study plan

Dynamic PAPE

Other

In this protocol, the load determined for footballers during knee extension will be applied as 90% of their one repetition maximum (1TM). After a standard warm-up session at the beginning, the protocol will be performed by performing 1 set of 3 repetitions with the previously determined 1TM 90% load without resting between repetitions. Isometric knee extension exercise will be used in the protocol. The movement will be performed sitting, in a position suitable for limb lengths and in a controlled manner using a leg extension machine. At the beginning of the movement, the knees will be flexed 90° and the adjustable lever arm of the machine will be fixed at this angle. Then they will be asked to perform bilateral isometric knee extension until the knees form a 180° angle. They will also be verbally motivated to complete the knee extension exercise.

Isometric PAPE

Other

Isometric contraction will be used in the protocol. On the leg extension machine, the protocol will be performed by applying 3 sets of 3 seconds against the lever arm only with 1TM 90% load, 2 minutes rest will be applied between sets. Isometric knee extension exercise will be used in the protocol. The movement will be performed sitting, in a position suitable for limb lengths and in a controlled manner using a leg extension machine. At the beginning of the movement, the knees will be flexed 90° and the adjustable lever arm of the machine will be fixed at this angle. Then they will be asked to perform bilateral isometric knee extension until the knees form a 180° angle. They will also be verbally motivated to complete the knee extension exercise.

Primary outcomes

  1. Significant difference in dynamic condition

    Time frame: From baseline to the end of measurement at 1 weeks

    It is expected that there will be a significant difference in the rate of change of direction during different rest periods in the dynamic contraction condition compared to the isometric contraction condition

  2. Significant difference in isometric condition

    Time frame: From baseline to the end of measurement at 1 weeks

    It is expected that there would be a significant difference in the rate of direction change during different rest periods in the isometric contraction condition compared to the dynamic contraction condition.

  3. The time between the conditions is different

    Time frame: From baseline to the end of measurement at 1 weeks.

    Compared to the first measurement, a change in the rate of directional change in conditions is expected.

Other outcomes

  1. Anthropometric Measurements 1

    Time frame: Baseline

    Participants' height (cm) will assess by using a stadiometer (Holtain Stadiometer, England)

  2. Anthropometric Measurements 2

    Time frame: Baseline

    Body weight (kg) will asses by Inbody 270 (Biospace, California, USA).

  3. Anthropometric Measurements 3

    Time frame: Baseline

    Body mass index (BMI) (kg/m2) will asses by Inbody 270 (Biospace, California, USA).

  4. Anthropometric Measurements 4

    Time frame: Baseline

    Body fat percentage (%) will asses by Inbody 270 (Biospace, California, USA).

  5. Knee Extension 1Repetition maximum Test

    Time frame: Baseline

    The 1RM of the soccer players will be performed on the leg extension device. The warm-up will be followed by a standard warm-up set of five repetitions with 50% of their estimated 1RM. Following this, participants will complete a preparation phase of 1-2 sets of 2-3 repetitions with a load corresponding to approximately 60-80% of their estimated 1RM.

Sponsors and collaborators

Lead sponsor

Karabuk University

Other

Registry information

Official study title

Post-activation Performance Enhancement in Soccer Players: The Effect of Different Contraction and Rest Periods on Changing Direction Ability

Acronym: PAPEsoccer

Important dates

Study start
2025
Primary completion
2025
Study completion
2025
First posted
Mar 13, 2025
Registry last updated
Mar 13, 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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