• Physical Therapy Korea
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• v.1 no.1
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• pp.25-34
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• 1994

This study investigated the hypothesis that purposeful activity is an intrinsic motivator. Affecting exertion during the performance of purposeful and nonpurposeful activity was studied in 30 elementary school students. The subjects acted as their own controls in the performance of other exercise. The three experimental exercises were jumping rope, defined as a nonpurposeful activity, and jumping rope with reinforcement, defined as purposeful activity I, and jumping rope with double reinforcement (food), defined as purposeful activity II. Duration and cessation of exercise were entirely controlled by the subject. The number of jumps were measured immediately after cessation of exercise and duration of exercise in seconds by observer. The results were as follows : 1. There was a significant difference in the required time of performance between purposeful and nonpurposeful jumping (p< .05). 2. There was a significant difference in the number of jumps between nonpurposeful and nonpurposeful jumping after reinforcement. (p< .05). Implications for practice and further research are discussed.

• Research in Community and Public Health Nursing
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• v.18 no.4
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• pp.535-542
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• 2007

Purpose: The purpose of this study was to identify the effects of an overweight control exercise program on body composition and blood lipids. Method: This comparative study was conducted at an elementary school in Seoul, Korea. Pre and post body weight, BMI, PBF, and obesity degree as body composition and TC, HDL-C, LDL-C, and TG as blood lipids were tested. The aerobic exercise lasted 12 weeks from April to July, 2006. A total of 168 overweight 3rd grade to 5th grade school children attended and were divided into a walking exercise group (n=68) and a rope jumping exercise group (n=38). Data were analysed using SAS 8.12. Result: At the end of the program, the participation rate was higher in the rope jumping exercise group than in the walking exercise group. Body weight, BMI, PBF, obesity degree, TC, and LDL-C were lower than those before the program, and HDL-C was higher than before the program. Conclusion: The school-based overweight control exercise program was effective. Because of the participation rate was higher in the rope jumping exercise group than in the walking exercise group, rope jumping exercise is recommended for low grade children.

• Journal of International Academy of Physical Therapy Research
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• v.10 no.2
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• pp.1756-1762
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• 2019

Background: Functional ankle instability (FAI) indicating a decrease in muscle strength, proprioception, neuromuscular control, balance and postural control function. Objective: To investigate the effect of jumping exercise on the supporting surface on the ankle muscle thickness, proprioceptive sensation, and balance in adults with FAI. Design: Randomized Controlled Trial. Methods: Twenty young people with FAI were randomly assigned to the unstable supporting surface jump group (N=10) and the stable supporting surface jump group (N=10). The intervention was conducted three times a week for eight weeks, and for 30 minutes per session. Trampoline was used as an unstable support surface and the stable support surface was carried out on a regular floor. The thickness of the tibialis anterior muscle and medial gastrocnemius muscle was measured by ultrasonography, and the proprioception of dorsiflexion and plantarflexion was measured using an electrogoniometer. The dynamic balance was also measured with a balance meter. Results: The the muscle thickness of the medial gastrocnemius muscle was significantly higher in the stable supporting surface jump group than in the unstable supporting surface jump group (p<.05). Furthermore, the plantar flexion proprioception and dynamic balance were significantly improved in the unstable supporting surface jump group than in the stable supporting surface jump group in the intergroup comparison (p<.05). Conclusions: The conclusion has been reached in this study that the jumping exercise on the unstable supporting surface could be a more effective in improving FAI than the regular surface.

• Journal of Life Science
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• v.18 no.8
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• pp.1115-1122
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• 2008

The purpose of this study is to identify the effect of rope-jumping to music with weight loading on middle school girls' blood lipid and growth hormone. Toward this end, the study targeted 24 middle school girls at Y Girls' Middle School in Yangsan, Gyeongnam, who have no health problems or exercise experience, after sufficiently explaining to them the study's purpose. The selected students were categorized into a music rope-jumping group (8), a music rope-jumping group with weight loading (8), and a control group (8). In a comparison of blood lipid within the exercise groups showed that the music rope-jumping groups' measures changed significantly by demonstrating increases or decreases in RBC, T-C, TG, HDL-C and LDL-C (p<0.05). The music rope-jumping group with weight loading showed significant differences in WBC, RBC, glucose, T-C, TG, HDL-C and LDL-C by demonstrating increases of decreases (p<0.05). A comparison between the exercise groups revealed that the music rope-jumping group showed significant increases in growth hormone (p<0.05). The music rope-jumping group with weight loading also showed significant increases in growth hormone (p<0.05). The study's results identified music jump-roping with weight loading to effect students' blood lipids and growth hormone.

• Journal of Life Science
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• v.19 no.1
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• pp.111-116
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• 2009

The purpose of this study was to elucidate the effects of 12 weeks rope jumping and Swiss ball exercise (55 to 75% HRR: 3 times a week) on body composition and bone formation markers in young children. Forty eight participants were divided into two groups, the exercise group (n=24) and the control group (n=24). All items were assesed before and after exercise program. The results of this study are as follows; 1. Body composition: In the comparison of mean changes before and after exercise program execution on body composition within each group, the exercise group showed significant increases in height, weight, fat mass and %fat. The control group showed significant increases in all items. The interaction effect between groups and time didn't appear a significant difference. 2. Osteocalcin: In the comparison of mean changes before and after exercise program execution in osteocalcin within each group, the exercise group didn't appear a significant change and the control group were significantly decreased in girl children. The interaction effect between groups and time didn't appear a significant difference. 3. Alkaline phosphatase: In the comparison of mean changes before and after exercise program in Alkaline phosphatase within each group didn't appear a significant difference in exercise group and control group. The interaction effect between groups and time showed a significant difference. In conclusion, for young children in the stage of the formation of bone mineral contents, rope jumping and Swiss ball exercise are postive effect in promoting their growth and bone health, but osteocalcin concentration did not changes. Thus, further research is required to consider intensity and duration of exercise on bone formation markers of young children's.

• Journal of the HCI Society of Korea
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• v.9 no.2
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• pp.13-21
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• 2014

Jump-rope is a simple and effective exercise, but its intensive exercise load and monotonous pattern make it difficult to perform consistent workout. On the other hand, jumping rope accompanies large amount of kinetic energy which can be converted into electrical energy. In this study, we designed and implemented a self-powered jump-rope which can support the low-power embedded Bluetooth system inside it. The embedded system wirelessly transmits the acceleration data measured during jumping-rope exercise to a smartphone. We also developed a smartphone app which can count the number of jumps and provide real-time feedback with sound and animated graphic effects in a game context. Pilot test using the prototype smart jump-rope verified that it can be useful to motivation for the jump-rope exercise and make the exercise more effective by providing users with precise information about their exercise. We expect that the developed self-powered jump-rope will change the exercise from an intensive physical activity into electricity-generating fun experience combined with smartphone game, which maximize the benefit of the consistent jump-rope exercise.

• Journal of Nutrition and Health
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• v.17 no.4
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• pp.305-312
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• 1984

The effect of exercise on serum cholesterol and triglyceride concentration and on urinary creatinine and 3-methylhistidine excretion was studied in eight healthy women, aged 21 to 25yr. Subjects were tested before and after a 3-day experimental period, during which 1000 times rope-jumping a day were performed. Serum cholesterol and triglyceride levels decreased significantly after exercise. Urinary excretion of creatinine and 3-methylhistidine slightly increased after exorcise.

• The Journal of Korean Physical Therapy
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• v.31 no.4
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• pp.176-183
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• 2019

Purpose: The purpose of this study was to investigate the short term effects of ASEJ (ankle strengthening with emphasis on jumping) for 3weeks on strength, mechanical properties, and balance and to compare the balance with and without HH(high-heel) condition. Methods: ASEJ (a combined exercise of squat, heel raise up, and jumping) were performed for the subjects in 11 female ankle instability young females ($21.7{\pm}2.0yrs$ Cumberland ankle instability score $19{\pm}6.5$). To investigate the effect of ASEJ, investigator used dynamometer for measuring strength, MyotonPRO for measuring mechanical properties(tone, stiffness, and elasticity of the muscles), I-Balance test for static balance, and Y-balance test for dynamic balance between the condition with and without HH condition. All data were normally distributed and analyzed using the SPSS 22.0 statistical program. Comparing pre- and post-intervention and the condition with and without HH conditions data were examined using the paired t-test. The level of significance was chosen as 0.05 for all the analyses. Results: 3wks of ASEJ would strengthen leg muscles and increasing muscle tone and stiffness in most muscles however there was decreasing muscle elasticity of gastrocnemious. In addition, the ASEJ improves the static balance for ankle instability young females and increases the dynamic balance when wearing the heels especially. Conclusions: the ASEJ could recommend to improve the strength and balance for ankle instability young females. Also, measuring the balance with HH conditions well represents the risk of ankle damage in female.

• Journal of Korean Public Health Nursing
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• v.25 no.1
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• pp.38-47
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• 2011

Purpose: The study investigated the effects of 9 weeks of group music rope-jumping training on health-related physical fitness and blood lipid in obese elementary school boys and girls. Method: Subjects were randomly assigned to either a training group (37 boys and 18 girls) or control group (36 boys and 19 girls). The training group exercised for 1 hour, 2 days per week during the 9-week supervised music rope-jumping training program. The control group was asked to maintain their normal daily physical activities. The effects of the interventions on physical fitness and blood lipids were analyzed by two-way repeated measures ANOVA (group ${\times}$ time). Results: There were significant group ${\times}$ time interaction effects on body weight (p<.023), %body fat (p=.09), body mass index (p=.018), and body fat mass (p=.019) in school girls. However, there was not an interaction effect on serum lipids in both genders. Conclusion: The 9-week music rope-jumping training program used was effective for improving body composition in obese elementary school girls.

• Journal of the Semiconductor & Display Technology
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• v.7 no.4
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• pp.51-55
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• 2008

In this study, we have figured out exercise time and the amount of burned calories, using a three-axis acceleration sensor which we name as a health sensor. What is more, the health sensor calculates the degree of physical exercise taken during exercise. As is generally known, continuing, regular exercise is far more effective than short time exercise for sustainable health management. The health sensor is, therefore, recommended as an instrument to efficiently carry out the health management. Additionally, the health sensor was applied as an exercise subsidiary system to walking and jumping rope tests. In light of their results, the sensor system was found useful for analyzing the pattern of exercise.