1.An empirical study on the changes of upper limb composition and BMD of male university students by different types of resistance training
LI He, SUI Zenghui, HOU Xihe, WANG Renwei, WEN Xinfei, CHEN Qianhong
Chinese Journal of School Health 2019;40(10):1529-1532
Objective:
To compare the effects of different types of strength training on upper limbs’ body composition and maximum strength and bone density of male university students, so as to provide a reference for college students to choose reasonable resistance training methods.
Methods:
Forty-two male university students were randomly divided into three experimental groups: maximum-strength group, MS(n=12); speed-strength group, SS(n=15); strength-endurance group, SE(n=15). All subjects were subject to resistance training for 6 weeks, twice a week. Incremental load method was used to determine the maximum strength of the subject to develop a training program. Upper limbs’ Body Composition and BMD were performed by Dual energy X-ray absorptionmetry.
Results:
After the continuous training for 6 weeks, maximum strength of upper limbs increased significantly with training time,SE grows faster[(51.00±4.81)(67.20±5.66)(76.87±6.21)kg]; The body fat percentage of SS group and SE group decreased significantly[(13.50±4.10)%,(12.60±2.80)%;(13.70±3.80)%,(12.70±3.10)%](t=2.35,2.30,P<0.05), while LM of upper limb increased significantly[(5.19±0.59)(5.86±0.61);(5.27±0.72)(6.21±0.59)kg](t=-2.48,-2.94,P<0.05). There was no significant difference in the body fat percentage and LM of upper limb between MS group[(14.0±3.3)%,(13.6±2.3)%] and SE group[(5.33±0.81)(5.41±0.79)kg](t=0.31,-0.22,P>0.05); BMC and BMD of upper limbs increased in all groups, but the increase of SS group and SE group was statistically significant(t=-3.07,-2.43,P<0.05).
Conclusion
Strength endurance resistance training for male college students can effectively promote muscle strength growth, increase bone density and improve upper limb composition.