Somatic and Psychological Profile of Athletes Across Seasonal Cycles

NCT07709273 | Recruiting

• 2 other identifiers: KB-5-I/2026Institute of Sport Sciences
• Study Type: observational
• Target: 300
• Locations: 1 country
• Sites: 1

Brief Summary

This observational longitudinal study will examine the somatic and psychological profile of team sport athletes across seasonal training cycles. The study will include male and female athletes who play football, volleyball, or ice hockey. The planned study population consists of 300 participants, including 200 adults aged 18 to 38 years and an additional 100 adolescent athletes aged 14 to 17 years. Participants will be assessed at two time points, before and after a transitional period in the annual training cycle, such as the off-season, holiday break, preparatory period, or competitive period. These periods are associated with changes in training load, recovery, daily routine, and lifestyle, and may therefore influence both body composition and psychological functioning. The longitudinal design will allow evaluation of changes over time and identification of factors associated with more favorable or less favorable adaptations. The study will assess body composition and selected behavioral and psychological characteristics. Adult participants will undergo body composition assessment using bioelectrical impedance analysis and dual-energy X-ray absorptiometry (DEXA). Adolescent participants included under the approved amendment will undergo the same study procedures except for DEXA. All participants will complete standardized self-report questionnaires assessing eating behavior, physical activity, sport-related perfectionism, and body esteem. The questionnaires used in the study include the Three-Factor Eating Questionnaire (TFEQ-13), the International Physical Activity Questionnaire (IPAQ), the sport perfectionism questionnaire, and the Body Esteem Scale. These tools will be used to examine whether eating behaviors, activity patterns outside formal training, perfectionism, and body image are associated with changes in body composition and related characteristics across different phases of the sports season. The main goal of the study is to improve understanding of how seasonal changes in training and daily habits affect the physical and psychological characteristics of athletes. The results may help identify factors linked to beneficial or unfavorable changes in body composition and well-being, and may support the development of more individualized monitoring, nutrition, training, and psychological support strategies for athletes. Participation in the study is voluntary. All participants, and legal guardians in the case of minors, will receive information about the study procedures, potential risks, and study aims before consent is obtained. Data will be handled confidentially and analyzed in anonymized form. Study findings are intended for scientific publication and for practical application in athlete monitoring and care.

Conditions

Eating Behavior; Perfectionism

Keywords

athletes; team sports; body composition; seasonal variation; eating behavior; physical activity; perfectionism; body esteem

Outcome Measures

Primary Outcomes (2)

• DEXA

  kg, %

  Baseline and Week 4

• BIA

  kg, %

  Baseline and Week 4

Secondary Outcomes (4)

• TFEQ-13

  Baseline and Week 4

• IPAQ

  Baseline and Week 4

• BES

  Baseline and Week 4

• DKPS

  Baseline and Week 4

Study Arms (1)

Team sport athletes

Male and female team sport athletes aged 14 to 38 years recruited from sports clubs and academies in Poland. The study is observational and does not assign participants to any intervention.

Other: No intervention

Interventions

No intervention OTHER

No intervention is being administered. Participants will undergo observational assessments only, including body composition measurements and questionnaires.

Team sport athletes

Eligibility Criteria

• Age: 14 Years - 38 Years
• Healthy Volunteers: Yes
• Age Groups: Child (0-17), Adult (18-64)
• Sampling Method: Non-Probability Sample

Study Population

Male and female team sport athletes recruited from sports clubs and academies in Poland, including football, volleyball, and ice hockey players aged 14 to 38 years.

You may qualify if:

• Male or female athletes.
• Age 14 to 38 years.
• Participation in a team sport, including football, volleyball, or ice hockey.
• Regular training experience of at least 5 years.
• Current membership in a sports club.
• Valid medical clearance confirming no contraindications to sport participation.
• Ability to understand the study procedures and complete study questionnaires.
• Willingness to provide informed consent.
• For participants under 18 years of age, written consent from a parent or legal guardian.

You may not qualify if:

• Pregnancy, due to exposure to ionizing radiation in adult participants undergoing DEXA.
• Refusal or inability to provide informed consent.
• For minors, absence of parental or legal guardian consent.
• Any medical or organizational condition that, in the investigators' opinion, would prevent safe participation or valid completion of the study procedures.
• DEXA will be performed only in adult participants.

Sponsors & Collaborators

• The Jerzy Kukuczka Academy of Physical Education in Katowice: lead
• Medical University of Silesia in Katowice: collaborator
• Batman University: collaborator

Study Sites (1)

The Jerzy Kukuczka Academy of Physical Education in Katowice

Katowice, Silesian Voivodeship, 40-065, Poland

RECRUITING

MeSH Terms

Conditions

Feeding Behavior; Motor Activity

Condition Hierarchy (Ancestors)

Behavior, Animal; Behavior

Study Officials

• Grzegorz Zydek, PhD

  The Jerzy Kukuczka Academy of Physical Education in Katowice, Mikołowska 72a, Poland, 40-065

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Grzegorz Zydek, PhD

CONTACT

+48504332664; g.zydek@awf.katowice.pl

Małgorzata M Michalczyk, ASSISTANT PROFESSOR

CONTACT

+48535016532; m.michalczyk@awf.katowice.pl

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Principal Investigator

Study Record Dates

• First Submitted: June 23, 2026
• First Posted: July 16, 2026
• Study Start: March 2, 2026
• Primary Completion: June 15, 2026
• Study Completion (Estimated): December 29, 2028
• Last Updated: July 16, 2026

Record last verified: 2026-07

Locations

PL (1)