Effects of Winter Swimming on Blood Indicators and Oxidative Stress in Males

NCT06223087 | Unknown

• 1 other identifier: 296/BS/INP/2021
• Study Type: observational
• Target: 30
• Locations: 1 country
• Sites: 1

Brief Summary

Exposure of the human body to cold water triggers numerous beneficial physiological changes. The study aimed to assess the impact of regular winter swimming on blood morphological, rheological, and biochemical indicators and activity of antioxidant enzymes in males. The study includes winter swimmers and a control group. Blood samples were taken twice - before the start (November) of the winter swimming season and after its end (March). The average duration of ice water baths was 3-5 minutes, with a minimum frequency of once a week. The water temperature during the swimming did not exceed 10°C, approaching 0°C during the winter period.

Conditions

Cold Exposure

Keywords

blood; rheology; cold; blood morphology; biochemistry; exercise

Outcome Measures

Primary Outcomes (15)

• blood sampling: platelets and leukocytes

  Measurements of: Platelets \[thousands/μl\], Leukocytes \[thousands/μl\], Neutrophils \[thousands/μl\], Eosinophils \[thousands/μl\], Basophils \[thousands/μl\], Lymphocytes \[thousands/μl\], Monocytes \[thousands/μl\].

  twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming

• blood sampling: erythrocytes

  Measurement of: Erythrocytes \[mln/μl\],

  twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming

• blood sampling: haemoglobin

  Determination of: Haemoglobin \[g/dl\], mean corpuscular haemoglobin concentration (MCHC) \[g/dl\],

  twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming

• blood sampling: haematocrit

  Determination of: haematocrit \[%\], red blood cell distribution width coefficient of variation (RDW-CV) \[%\],

  twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming

• blood sampling: haemoglobin mass

  Determination of: mean corpuscular haemoglobin (MCH) \[pg\],

  twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming

• blood sampling: Erythrocytes

  Determination of mean corpuscular volume (MCV) \[fl\], red blood cell distribution width standard deviation (RDW-SD) \[fl\],

  twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming

• blood sampling: rheology part 1

  Determination of red cell elongation index (EI) \[arbitrary unit: AU\], erythrocyte aggregation amplitude (AMP) \[AU\],

  twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming

• blood sampling: rheology part 2

  Determination of: aggregation index (AI) \[%\],

  twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming

• blood sampling:rheology part 3

  Determination of: half-time of total aggregation (t1/2) \[s\].

  twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming

• blood sampling: oxidative stress

  Measurement of catalase (CAT) \[nmol/min/ml\], and glutathione peroxidase (GPx) \[nmol/min/ml\].

  twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming

• blood sampling: oxidative stress - superoxide dismutase

  Measurement of superoxide dismutase (SOD) \[U/ml\],

  twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming

• blood biochemistry: Urea

  Measurement of: Urea \[mmol/l\].

  twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming

• blood sampling: Testosterone

  Determination of Testosterone concentration \[ng/dl\],

  twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming

• blood sampling: Cortisol

  Determination of Cortisol concentration \[µg/dl\],

  twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming

• blood biochemistry: Creatine

  Determination of Creatinine concentration \[µmol/l\],

  twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming

Study Arms (2)

control

group not practicing winter swimming

winter swimmers

group practicing winter swimming

Other: winter swimming

Interventions

winter swimming OTHER

Intervention involves bathing/swimming in cold water during the winter months in open waters

winter swimmers

Eligibility Criteria

• Age: 25 Years - 60 Years
• Sex: male
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)
• Sampling Method: Non-Probability Sample

Study Population

Experienced in winter swimming, regularly swimming in cold water (open water) at least once a week in the period November - March

You may qualify if:

• Good health, practitioners of winter swimming
• control group: never did winter swimming and had a sedentary lifestyle.

You may not qualify if:

• medical contraindications to winter bathing

Sponsors & Collaborators

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

Study Sites (1)

University of Physical Education

Krakow, 31571, Poland

Location

Related Publications (1)

• Teleglow A, Konieczny K, Dobija I, Kusmierczyk J, Tota L, Rembiasz K, Maciejczyk M. Effect of regular winter swimming on blood morphological, rheological, and biochemical indicators and activity of antioxidant enzymes in males. BMC Sports Sci Med Rehabil. 2024 Jun 21;16(1):138. doi: 10.1186/s13102-024-00932-3.

  PMID: 38907310 DERIVED

MeSH Terms

Conditions

Common Cold; Motor Activity

Condition Hierarchy (Ancestors)

Respiratory Tract Infections; Infections; Picornaviridae Infections; RNA Virus Infections; Virus Diseases; Respiratory Tract Diseases; Behavior

Study Officials

• Aneta Teleglow

  University of Physical Education, Kraków, Poland

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Head of Blood Physiology Laboratory

Study Record Dates

• First Submitted: December 30, 2023
• First Posted: January 25, 2024
• Study Start: January 1, 2021
• Primary Completion: December 31, 2023
• Study Completion: December 31, 2024
• Last Updated: January 25, 2024

Record last verified: 2024-01

Data Sharing

• IPD Sharing: Will not share

Locations

PL (1)