Single Effort in Air Temperature of Minus 10°C

NCT07664072 | Completed

• 1 other identifier: 429/BS/INP/2026
• Study Type: interventional
• Target: 30
• Locations: 1 country
• Sites: 1

Brief Summary

Exercise in the cold is an attractive option for many athletes. Erythrocyte aggregation, as one of the main rheological parameters, constitutes an important indicator of microcirculation and oxygen transport capacity in the human body; therefore, its changes in response to exercise and cold are of clinical and physiological relevance. The purpose of the study was to determine the effects of a single physical effort at low temperature (-10°C) in a thermal climate chamber on the red blood cell system, erythrocyte aggregation, lactate, cortisol, and testosterone in healthy males. Methods: The study was experimental in nature and assumed a comparison of the body response to exercise performed at reduced (-10°C) and neutral (18°C) temperatures. It involved 30 healthy males, students of physiotherapy at the University of Physical Culture in Krakow, Poland. The enrolled individuals were divided into 2 groups: group 1 (n = 15) ran in a thermal climate chamber at an air temperature of -10°C, group 2 (n = 15) ran in the fresh air at a neutral air temperature of 18°C.

Conditions

Healthy

Keywords

Cold air; Beep test; Aggregation index; erythrocyte aggregation; lactate; cortisol; testosterone

Outcome Measures

Primary Outcomes (5)

• blood sampling: AI

  aggregation index

  twice: before starting the exercise and immediately after finishing it

• blood sampling:AMP

  amplitude of aggregation

  twice: before starting the exercise and immediately after finishing it

• blood sampling: T1/2

  half-time kinetics of total aggregation

  twice: before starting the exercise and immediately after finishing it

• blood sampling: RBC

  red blood cells

  twice: before starting the exercise and immediately after finishing it

• blood sampling: Hb

  hemoglobin

  twice: before starting the exercise and immediately after finishing it

Study Arms (2)

Single effort in air temperature of -10°C

EXPERIMENTAL

The body response to exercise performed at reduced (-10°C) temperature

Other: cold

Single effort in neutral (18°C) condition

EXPERIMENTAL

The body response to exercise performed at neutral (18°C) temperature

Other: neutral

Interventions

cold OTHER

the exercise, blood samples

Single effort in air temperature of -10°C

neutral OTHER

the exercise, blood samples

Single effort in neutral (18°C) condition

Eligibility Criteria

• Age: 22 Years - 23 Years
• Sex: male
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• \- Healthy men

You may not qualify if:

• women

Sponsors & Collaborators

• University School of Physical Education, Krakow, Poland: lead

Study Sites (1)

University of Physical Culture

Krakow, Lesser Poland Voivodeship, 31-571, Poland

Location

MeSH Terms

Interventions

Cold Temperature

Intervention Hierarchy (Ancestors)

Temperature; Thermodynamics; Physical Phenomena; Weather; Atmosphere; Environment; Ecological and Environmental Phenomena; Biological Phenomena; Meteorological Concepts; Environment and Public Health

Study Officials

• Aneta Teległow, Professor

  University of Physcial Eduction, Kraków, Poland

  STUDY DIRECTOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NON RANDOMIZED
• Masking: NONE
• Masking Details: The workout was undertaken in a thermal climate chamber in the Laboratory for Climate Technology Research and Heavy Duty Machines, Cracow University of Technology in Krakow. The thermal climate chamber meets the requirements of the PN-EN ISO/IEC 17025:2005 standard and possesses an accreditation certificate No. AB 1678, issued by the Polish Centre for Accreditation. The Laboratory for Climate Technology Research and Heavy Duty Machines is a research center accredited in the field of defense and security by the Minister of National Defense (accreditation No.: 55/MON/2018).
• Purpose: OTHER
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Professor University

Model Details: Simple randomization with a 1:1 allocation ratio served to randomly assign the participants to the experimental or control group. This was done before the first blood sampling, with the randomization sequence generated prior to the study. No stratification factors were used. The participants in the experimental group performed physical exertion under the conditions of low temperature (-10°C). The workout was undertaken in a thermal climate chamber in the Laboratory for Climate Technology Research and Heavy Duty Machines, Cracow University of Technology in Krakow. The thermal climate chamber meets the requirements of the PN-EN ISO/IEC 17025:2005 standard and possesses an accreditation certificate No. AB 1678, issued by the Polish Centre for Accreditation. The Laboratory for Climate Technology Research and Heavy Duty Machines is a research center accredited in the field of defense and security by the Minister of National Defense (accreditation No.: 55/MON/2018). The control group, in t

Study Record Dates

• First Submitted: June 2, 2026
• First Posted: June 23, 2026
• Study Start: May 11, 2024
• Primary Completion: May 11, 2024
• Study Completion: May 11, 2024
• Last Updated: June 23, 2026

Record last verified: 2026-06

Data Sharing

• IPD Sharing: Will share
• Shared Documents: STUDY PROTOCOL
• Time Frame: 1 day
• Access Criteria: ACCESS TO DATA BY CONTACTING my email:aneta.teleglow@awf.krakow.pl

Locations

PL (1)