Study on the effect of cryotherapy on the recovery of elite sailing athletes

Study on the effect of cryotherapy on the recovery of elite sailing athletes

Abstract:Low-temperature cryotherapy whole-bodycryotherap y (WBC) is a new cold therapy that was initially introduced into athletes as an anti-inflammatory therapy in chronic inflammatory conditions. WBC mainly allows participants, standing in a room full of safe but extremely cold gas for at least two minutes from-110 °C to-190 °C for up to five minutes. Studies of this therapy suggest that the extreme temperature of ultra-low temperature cold .therapy may amplify the effects of cold therapy such as cold water immersion (Cold-water immersion, CWI),

which has been shown to reduce pain and inflammation. After intense exercise, discomfort within the skeletal muscle, accompanied by decreases in muscle strength, range of movement, and physical performance, may occur in elite or novice athletes. This feeling is also called delayed muscle soreness, It is one of the most common forms of sports injuries and is associated with motor muscle injuries (exercise-i nduced muscle damage, EIMD).

It has been proposed that systemic cold hypothermia can further limit the inflammatory response and accelerate the recovery of muscle structural integrity and function after EIMD.

Study purpose: study ultra-low temperature systemic cryotherapy technology on sailing body function recovery, further clear body ultra-low temperature cryotherapy technology in promoting training fatigue recovery,improve body function, improve the effect of the body immunity, for the emerging means of physical recovery in sports practice application and promotion to provide more theoretical support.

Study method: 14 elite sailboats were randomly divided into two groups according to physical examination, BMI and value: cross experiment design, one group had ultra-low temperature intervention in the first stage and then control; two groups were arranged opposite.

The middle stage of the intensive training during the winter training was selected as the experimental stage. The training content was carried out according to the routine without additional intervention. During the intervention stage, ultra-low temperature recovery after afternoon training,

and the control group made daily recovery after daily training without intervention. The experiment lasted for 9 weeks. The first four weeks was the same as the athlete training plan for the second four weeks. The middle week was the cross experiment washout period, and the whole-body ultra-low temperature intervention was suspended.

The blood routine indexes of different groups before and after multiple interventions: hemoglobin and red blood cell count; immune system indexes: lymphocyte ratio, intermediate cells, white blood cell count (WBC), and neutrophil ratio. Endocrine and hormone-related indicators: serum testosterone (T) serum cortisol (C), serum testosterone to cortisol ratio (T / C); training load and muscle injury indicators: serum creatine kinase (CK) blood urea nitrogen (BUN); self-perception scale: changes in deep sleep self-perception score, etc.

Results: After the cross-experiment intervention,

the hemoglobin, red blood cells and hematocrit of the two groups increased relative to the basal value, and the added value of the ultra-low temperature group was greater than that of the control group, but there was no significant difference. Creatine kinase and blood urea nitrogen levels were significantly lower in the ultra-cold group (P <0.05); testosterone (T) level and T / C values significantly increased (P <0.05), cortisol (C) significantly decreased (P <0.05); the ultra-cold group had significantly lower intermediate cells and neutrophils (P <0.05); no significant changes in lymphocytes and white blood cell count in the two groups; sleep quality score was significantly higher than that in the control group.

Conclusion: 1. Ultra-low temperature cold therapy can improve the activity of some intermediate cells and neutrophils, improve the body immune suppression caused by intensive training, improve the immune imbalance, and improve the immune function of the body.2. Whole body ultra-low temperature cold therapy has a positive effect on the change of endocrine indexes of athletes, which can improve the testosterone value (T), reduce cortisol (C), and then improve the T / C ratio. Improve the body's anabolism, reduce catabolism, promote the body's protein synthesis and fatigue elimination ability is enhanced.3. Ultra-low temperature cold therapy can significantly reduce the content of serum creatine kinase and lactate dehydrogenase, muscle injury and sports training markers in long-term sports, and promote athletes.

Better body recovery.4. Ultra-low temperature cold therapy can effectively improve the sleep quality of athletes, reduce the insomnia caused by a large number of high-intensity sports, and promote the better recovery of the body.5 When the degree of pain in athletes and cellular muscle damage hinders exercise, the effectiveness of ultra-low temperature cold therapy as a recovery method can be explored to verify the effect of its use. A full understanding of exercise and therapeutic responses requires further understanding of the role and time-course changes of pain and immune function in the recovery of muscle cell microtrauma.

The effects of multiple whole-body hypothermia during prolonged exercise training were further investigated to identify potential effects on recovery, performance, and muscle adaptation processes. Future studies will require a larger sample size to determine the significance of organismal changes and rigorous methodological controls to determine the exact impact of whole-body crythermia on these pathways.

Key words: ultra-low temperature systemic cryotherapy technology; functional status; winter training period; sailboat athletes