Skip to main content
OpenTrials
Completed

NCT Number: NCT07235124

Motivation and Neurotransmitters in Rowers

The goal of this observational study is to learn how motivation and body chemistry are linked during and after intense exercise in national-level rowers.

The main questions this study aims to answer are:

Do athletes with higher motivation show different changes in brain chemicals after exercise? How do hormone and neurotransmitter levels change during recovery after exercise?

Participants will:

Complete a motivation questionnaire called the Inventory of Achievement Motivation (LMI) before the exercise test.

Perform a 6000-meter rowing test on an indoor rowing machine. Have blood samples taken three times: before exercise, immediately after exercise, and 1 hour after exercise.

Researchers will measure blood levels of testosterone, cortisol, serotonin, dopamine, beta-endorphin, anandamide (AEA), and 2-arachidonoylglycerol (2-AG).

This study will help researchers understand how motivation and body chemistry work together to influence performance and recovery in highly trained athletes.

Completed

Looking for future studies?

Notify Me

Key information

Age range

18 year–25 year

Sex eligibility

Male

Study type

Observational

Primary location

Poznań University of Physical Education

Poznan, Greater Poland Voivodeship, 61-871, Poland

About this study

This study explores how motivation and body chemistry are connected during and after intense physical exercise in national-level rowers. Researchers want to understand how psychological factors, such as motivation to achieve goals, relate to changes in hormones and brain chemicals that occur with exercise and recovery.

Before the exercise test, participants will complete a motivation questionnaire called the Inventory of Achievement Motivation (LMI). This questionnaire helps identify how strongly a person is driven to perform, overcome challenges, and reach success.

After the questionnaire, each participant will complete a 6000-meter rowing test on an indoor rowing machine. This test is designed to produce a high level of physical effort similar to competition conditions. Blood samples will be taken three times: before the test, immediately after the test, and one hour after recovery.

The blood samples will be used to measure levels of several hormones and neurotransmitters, including testosterone, cortisol, serotonin, dopamine, beta-endorphin, anandamide (AEA), and 2-arachidonoylglycerol (2-AG). These substances are involved in stress response, motivation, reward, and recovery.

Researchers will compare the results from the motivation questionnaire with changes in hormone and neurotransmitter levels. The goal is to find out whether more motivated athletes show different chemical responses to exercise and recovery.

Findings from this study may improve understanding of how the mind and body interact during intense training. This knowledge could help athletes and coaches develop better ways to support motivation, performance, and recovery in high-level sports.

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

National-level male rowers Age between 18 and 35 years Minimum of 3 years of systematic rowing training Regular training load (at least 10 sessions per week during the competitive season) Good general health and medical clearance for maximal exercise testing

Exclusion criteria

Current illness, injury, or infection Use of medications or dietary supplements that could affect hormone or neurotransmitter levels Smoking or use of psychoactive substances Inadequate sleep or food intake before testing Refusal or inability to provide informed consent

Treatment and study plan

6000-meter rowing ergometer test

Other

Participants perform a 6000-meter rowing test on an indoor ergometer at maximal effort to simulate race conditions and induce physiological fatigue.

Primary outcomes

  1. Changes in serum Cortisol levels

    Time frame: Before exercise, immediately after, and 1 hour after recovery

    Measurement of Cortisol serum concentrations (ng/mL).

  2. Changes in serum Testosterone levels

    Time frame: Before exercise, immediately after, and 1 hour after recovery

    Measurement of Testosterone serum concentrations (ng/mL).

  3. Changes in serum Dopamin levels

    Time frame: Before exercise, immediately after, and 1 hour after recovery

    Measurement of Dopamin serum concentrations (ng/mL).

  4. Changes in serum Serotonin levels

    Time frame: Before exercise, immediately after, and 1 hour after recovery

    Measurement of Serotonin serum concentrations (ng/mL).

  5. Changes in serum Beta-endorphin levels

    Time frame: Before exercise, immediately after, and 1 hour after recovery

    Measurement of Beta-endorphin serum concentrations (ng/mL).

  6. Changes in serum anandamide (AEA) levels

    Time frame: Before exercise, immediately after, and 1 hour after recovery

    Measurement of anandamide (AEA) serum concentrations (ng/mL).

  7. Changes in serum 2-arachidonoylglycerol (2-AG)) levels

    Time frame: Before exercise, immediately after, and 1 hour after recovery

    Measurement of 2-arachidonoylglycerol (2-AG) serum concentrations (ng/mL).

Secondary outcomes

  1. Changes in Testosterone-to-cortisol ratio (T:C)

    Time frame: Before exercise, immediately after, and 1 hour after recovery

    Ratio calculated from serum testosterone and cortisol concentrations (ng/mL), used as an indicator of anabolic-catabolic balance.

  2. Changes in TSerotonin-to-dopamine ratio (S:D)

    Time frame: Before exercise, immediately after, and 1 hour after recovery

    Ratio of serum serotonin to dopamine concentrations (ng/mL), reflecting neurochemical balance related to motivation and fatigue.

  3. Achievement Motivation (LMI score)

    Time frame: Before exercise (baseline)

    Assessment of achievement motivation using the Inventory of Achievement Motivation (LMI). The questionnaire evaluates multiple dimensions of motivation, such as persistence, confidence in success, goal setting, and compensatory effort. Total and subscale scores are analyzed to identify individual motivational profiles.

Sponsors and collaborators

Lead sponsor

Poznan University of Physical Education

Other

Registry information

Official study title

Psychobiological Correlates of Achievement Motivation and Neurotransmitter Responses to Exercise in Elite Rowers

Important dates

Study start
2023
Primary completion
2023
Study completion
2023
First posted
Nov 19, 2025
Registry last updated
Nov 19, 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.

Published trials that share one or more normalized conditions with this study.