Effects of Winter Swimming on Blood Morphological, Rheological, and Biochemical Indicators and Oxidative Stress in Males
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 30
- 试验地点
- 2
- 主要终点
- blood sampling: haemoglobin mass
研究概览
简要总结
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.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Prospective
入排标准
- 年龄范围
- 25 Years 至 60 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Good health, practitioners of winter swimming
- •control group: never did winter swimming and had a sedentary lifestyle.
排除标准
- •medical contraindications to winter bathing
结局指标
主要结局
blood sampling: haemoglobin mass
时间窗: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
Determination of: mean corpuscular haemoglobin (MCH) \[pg\],
blood sampling: Erythrocytes
时间窗: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
Determination of mean corpuscular volume (MCV) \[fl\], red blood cell distribution width standard deviation (RDW-SD) \[fl\],
blood sampling: haemoglobin
时间窗: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
Determination of: Haemoglobin \[g/dl\], mean corpuscular haemoglobin concentration (MCHC) \[g/dl\],
blood sampling: erythrocytes
时间窗: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
Measurement of: Erythrocytes \[mln/μl\],
blood sampling: haematocrit
时间窗: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
Determination of: haematocrit \[%\], red blood cell distribution width coefficient of variation (RDW-CV) \[%\],
blood sampling: rheology part 1
时间窗: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
Determination of red cell elongation index (EI) \[arbitrary unit: AU\], erythrocyte aggregation amplitude (AMP) \[AU\],
blood sampling: rheology part 2
时间窗: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
Determination of: aggregation index (AI) \[%\],
blood sampling:rheology part 3
时间窗: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
Determination of: half-time of total aggregation (t1/2) \[s\].
blood sampling: platelets and leukocytes
时间窗: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
Measurements of: Platelets \[thousands/μl\], Leukocytes \[thousands/μl\], Neutrophils \[thousands/μl\], Eosinophils \[thousands/μl\], Basophils \[thousands/μl\], Lymphocytes \[thousands/μl\], Monocytes \[thousands/μl\].
blood sampling: oxidative stress - superoxide dismutase
时间窗: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
Measurement of superoxide dismutase (SOD) \[U/ml\],
blood sampling: Testosterone
时间窗: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
Determination of Testosterone concentration \[ng/dl\],
blood sampling: Cortisol
时间窗: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
Determination of Cortisol concentration \[µg/dl\],
blood biochemistry: Creatine
时间窗: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
Determination of Creatinine concentration \[µmol/l\],
blood sampling: oxidative stress
时间窗: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
Measurement of catalase (CAT) \[nmol/min/ml\], and glutathione peroxidase (GPx) \[nmol/min/ml\].
blood biochemistry: Urea
时间窗: twice: before the start of cold swimming in November and 5 months later (March), after the end of winter swimming
Measurement of: Urea \[mmol/l\].
次要结局
未报告次要终点
研究者
Aneta Teleglow
Head of Blood Physiology Laboratory
University School of Physical Education, Krakow, Poland