The Effects of Swimming Training on Heart Rate Variability in Adolescents

• Main Authors: Chien-Hua Li, 李建樺
• Other Authors: Shen-Yu Hsieh
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/80930589866128343273

碩士 === 國立臺灣師範大學 === 體育學系 === 93 === Heart rate can be used to estimate performance, and to monitor exercise intensity,and recovery. It can also be used as an indication of training status.Heart rate is regulated by the activity of the autonomic nervous system, and the variation is the heart rate variability (HRV). Purpose ：To examine the effects of swimming training on heart rate variability in adolescents（age 12～17）. Methods： Subjects were 64 healthy adolescents who volunteered to participate in the study. Among them, 42 trained swimmers were divided into the short-distance group（SD,n=18）, the medium-distance group（MD,n=17） and the long-distance group（LD,n=7）. The other 22 subjects were the age-matched control group. The HRV data were calculated for 5 minutes for very low-frequency power (VLFP), low-frequency power ratio (LF%), high-frequency power ratio (HF%), and total power (TP). The swimmers were ranked by their best performance for the last 6 months. The results were converted into a relative score for their performance. The sympathetic activity of the heart with LF% and the parasympathetic activity with HF% was estimated. The data were analyzed with one-way ANOVA（SPSS 10.0）. Pearson，s product-moment correlation was used to obtain coefficient in order to compare the differences. Results: In R-R interval and VLFP, there is little difference between the long-distance group and the general group, but a significant difference (p＜.05) was observed between the short-distance group and the medium-distance group. There is not much difference among the 4 groups in LF% and HF%; In TP, there is little difference between the short and the long-distance groups and the general group, but a significant difference (p＜.05) between medium-distance group and general group was seen, Little differences were shown between swimming performance and HRV. Conclusion: For adolescents, there is no evident change in the sympathetic activity and the parasympathetic activity of the heart after swimming training; The medium-distance swimming has a evident effect on HRV, and swimming performance has no relation to HRV.