Effect On The Exhaustion Swimming Time And Swimming Speed Of Mice Intermittent Exposed In Cryogenic Freezing Rain And Snow Weather

Objective:This study discusses the change rule of exhaustion swimming speed and swimming time of mice intermittent exposed in cryogenic freezing rain and snow weather, and clarifies the correlation between cryogenic freezing rain and snow weather environment meteorological elements and sport ability. Thus it provides the reference for the work and training in cryogenic freezing rain and snow weather. Methods:This study selects 80 Kunming male mice which are 8-week-old, fed in the normal temperature environment for one week. According to body mass, all the mice are randomly divided into 8 groups: the control group: 1 day exposed group(continuous intermittent exposure 1 day), 2 days exposed group(continuous intermittent exposure 2 days), 3 days exposed group(continuous intermittent exposure 3 days), 4 days exposed group(continuous intermittent exposure 4 days), 5 days exposed group(continuous intermittent exposure 5 days), 6 days exposed group(for continuous intermittent 6 days) and 7 days exposed group(for continuous intermittent 7 days), 10 mice in each group. Control group are raised 7 days in the normal temperature environment, and then do exhaustive swimming experiments. The swimming speed and time of mice are recorded. The exposure group exposed in the cryogenic freezing rain and snow weather for 1 hour a day, the rest of the time they were raised in the normal temperature environment. The seven exposed groups continuously intermittent exposure in the corresponding number of days, and then do exhaustive swimming experiments. After that the swimming speed and swimming time of mice in each group are recorded. Result:(1) Compared with the control group, the swimming time of mice in the1、2、3、4、5 and 7 day exposed group are decreased(P<0.01). But 6 days’ exposed group is increased. There was no significant difference.(2) Compared with the control group, the swimming speed of mice in the 1、2、5、6 and 7 day exposed group are increased. However, 3 and 4 day exposed group are decreased. There was no significant difference.(3) meteorological in the dew point(R2 = 0.93513) had the greatest influence on the mice swimming time,(R2 = 0.65059), temperature(R2=0.65059)is the second,THI(R2=0.20393)had the third influence in mice swimming time, and the influence of humidity(R2=0.08959)had minimal effects on the mice swimming time.(4) Meteorological in the dew point(R2 = 0.39533) had the greatest influence on the mice swimming speed, THI(R2 =0.22375) is in the second place, humidity(R2 = 0.15854) had the third influence in mice swimming speed, and the influence of temperature(R2 = 0.09964) had minimal effects on the mice swimming speed. Conclusions:(1) After continuously intermittent exposed seven days in cryogenic freezing rain and snow weather, the swimming time of mice had a downward trend overall change rule, only the sixth day had a slightly elevated.(2) After continuously intermittent exposed for seven days in cryogenic freezing rain and snow weather. The swimming speed of mice accelerated trend overall change rule, only the third and fourth day of swimming at a slower pace.(3) After continuously intermittent exposed for seven days in cryogenic freezing rain and snow weather. The meteorological elements in the dew point had most affected the swimming time of mice, followed by temperature,THI and humidity.(4) After continuously intermittent exposed seven days in cryogenic freezing rain and snow weather. The meteorological elements in the dew point had most affected the swimming speed of mice, followed by THI, humidity and temperature.