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Completed

NCT Number: NCT07382518

Effects of Motivational and Instructional Self-Talk on Performance and Stress in Soccer Forwards

This study investigates the effects of different types of self-talk on performance and stress regulation in soccer forwards. Self-talk is a psychological technique in which athletes use specific verbal cues to guide their thoughts and actions during training and competition. Two commonly used forms are motivational self-talk, which focuses on confidence and effort, and instructional self-talk, which focuses on technical and tactical cues.

Thirty-six male soccer forwards of different competitive levels participated in this study. Players were randomly assigned to a motivational self-talk group, an instructional self-talk group, or a control group. The intervention lasted six weeks. Before and after the intervention, participants completed assessments of soccer-specific technical skills, physical performance, and match tactical behavior. Psychological measures of self-efficacy and biological indicators of stress (salivary cortisol) were also collected.

The purpose of this study is to determine whether different self-talk strategies produce different effects depending on players' competitive level and task demands. The findings are expected to provide practical guidance for the use of psychological training strategies in soccer and other team sports.

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Key information

Conditions

Psychological Self-talk Interventions in Soccer Performance

Age range

18 year–25 year

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

Primary location

Beijing Sport University

Beijing, Beijing Municipality, China

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • Male university football players aged 18-25 years
  • Full-time university students regularly engaged in organized football training and competition
  • At least two years of systematic football training experience
  • In good general health at the time of enrollment
  • No musculoskeletal injuries or medical conditions affecting football performance within the previous 6 months
  • Normal or corrected-to-normal vision and hearing
  • Able to understand study procedures and complete soccer-specific performance and decision-making tasks
  • Provided written informed consent prior to participation

Exclusion criteria

  • History of neurological, psychiatric, or cognitive disorders that could influence decision-making or reaction time
  • Current participation in structured psychological skills training programs (e.g., self-talk training, imagery, mindfulness training) outside routine football practice during the study period
  • Use of medications or substances known to affect cognitive function
  • Presence of any medical condition or injury contraindicating participation in football training or testing
  • Failure to comply with the intervention protocol or outcome assessments

Treatment and study plan

Motivational Self-Talk Training

Behavioral

Participants received structured motivational self-talk training aimed at enhancing confidence, effort, and persistence during soccer training and match-related tasks. Individualized motivational cue words and phrases were developed and practiced under guidance, and participants were instructed to apply these cues consistently throughout the six-week intervention period.

Instructional Self-Talk Training

Behavioral

Participants were instructed to apply task-specific instructional self-talk cues to guide technical execution and tactical decision-making during soccer training over a six-week intervention period.

No Self-Talk (Usual Training Control)

Behavioral

Participants in the control group continued their regular soccer training and match preparation without receiving any form of structured self-talk instruction. No motivational or instructional self-talk strategies were introduced during the intervention period.

Primary outcomes

  1. Match-Based Technical and Tactical Performance

    Time frame: Baseline and immediately after the 6-week intervention

    Match-based technical and tactical performance was assessed during regular soccer match play using standardized match analysis procedures. This outcome represents players' overall technical and tactical performance exhibited in a real match context over the intervention period.

Secondary outcomes

  1. Shooting Accuracy

    Time frame: Baseline and immediately after the 6-week intervention

    Shooting accuracy was evaluated using a standardized soccer shooting test. Participants performed a series of shots toward predefined target zones within the goal. Shooting accuracy was calculated as the percentage of successful shots directed into the target areas, with higher percentages indicating better shooting performance.

  2. Sport Self-Efficacy

    Time frame: Baseline and immediately after the 6-week intervention

    Sport self-efficacy was assessed using the Sport Self-Efficacy Scale, a validated self-report questionnaire designed to measure individuals' perceived confidence in performing sport-related skills and tasks. The scale consists of multiple items rated on a Likert-type scale, yielding a total score ranging from 10 to 50, with higher scores reflecting greater perceived self-efficacy in sport performance contexts.

  3. Dribbling Run Performance

    Time frame: Baseline and immediately after the 6-week intervention

    Dribbling run performance was assessed using a standardized soccer dribbling run test. Participants completed the task while controlling the ball along a predefined running course, and performance was quantified as total completion time (seconds) recorded under standardized testing conditions.

  4. Loughborough Soccer Passing Test Performance

    Time frame: Baseline and immediately after the 6-week intervention

    Passing performance was assessed using the Loughborough Soccer Passing Test (LSPT), a standardized and widely used soccer-specific passing assessment. Participants were required to complete a series of prescribed passing and ball-control actions according to the standardized test protocol. Performance was quantified as the total time (seconds) required to complete the test under controlled testing conditions.

  5. Salivary Cortisol Concentration

    Time frame: Baseline and immediately after the 6-week intervention

    Salivary cortisol concentration was assessed as an index of physiological stress response. Saliva samples were collected using standardized saliva collection procedures and cortisol levels were quantified using enzyme-linked immunosorbent assay (ELISA) methods under controlled laboratory conditions.

Sponsors and collaborators

Lead sponsor

Beijing Sport University

Other

Registry information

Official study title

A Study on the Effects of Different Types of Self-Talk on Strikers in Soccer

Acronym: STF

Important dates

Study start
2025
Primary completion
2025
Study completion
2025
First posted
Feb 2, 2026
Registry last updated
Feb 2, 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.