Clinical trial NCT06223087: Effects of Winter Swimming on Blood Indicators and Oxidative Stress in Males
Official title: Effects of Winter Swimming on Blood Morphological, Rheological, and Biochemical Indicators and Oxidative Stress in Males
Study type: OBSERVATIONAL
Overall status: ACTIVE_NOT_RECRUITING
Conditions: Cold Exposure
Keywords: blood
rheology
cold
blood morphology
biochemistry
exercise
Lead sponsor: University School of Physical Education, Krakow, Poland
Sponsor class: OTHER
First posted: 2024-01-25
Enrollment: 30
Sex: MALE
Minimum age (years): 25
Maximum age (years): 60
Standard ages: ADULT
Accepts healthy volunteers: yes
Observational model: COHORT
Time perspective: PROSPECTIVE
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

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.


Eligibility criteria: Inclusion Criteria:

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

Exclusion Criteria:

* medical contraindications to winter bathing

Primary outcomes:
measure: blood sampling: platelets and leukocytes
timeFrame: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
measure: blood sampling: erythrocytes
timeFrame: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
measure: blood sampling: haemoglobin
timeFrame: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
measure: blood sampling: haematocrit
timeFrame: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
measure: blood sampling: haemoglobin mass
timeFrame: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
measure: blood sampling: Erythrocytes
timeFrame: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
measure: blood sampling: rheology part 1
timeFrame: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
measure: blood sampling: rheology part 2
timeFrame: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
measure: blood sampling:rheology part 3
timeFrame: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
measure: blood sampling: oxidative stress
timeFrame: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
measure: blood sampling: oxidative stress - superoxide dismutase
timeFrame: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
measure: blood biochemistry: Urea
timeFrame: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
measure: blood sampling: Testosterone
timeFrame: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
measure: blood sampling: Cortisol
timeFrame: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
measure: blood biochemistry: Creatine
timeFrame: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
Secondary outcomes:
Other outcomes:
Locations:
city: Kraków
country: Poland
facility: University of Physical Education
Study officials:
affiliation: University of Physical Education, Kraków, Poland
name: Aneta Teleglow
role: PRINCIPAL_INVESTIGATOR
References: