국내 마리나 현황 및 개선방안 연구

Ye-Rin Sun(선예린),Kyung-Hwa Lee(이경화),Bo-Young Moon(문보영) 융합관광콘텐츠학회 2016 융합관광콘텐츠학회지 Vol.2 No.1

The purpose of this study is to understand the current situation and to suggest an effective improvement plan for domestic marina industry. It has done analysis on the present condition of local marinas located coastal cities of Korea as well as case study on the successfully run overseas marinas, Yokohama Bayside Marina, Gold Coast City Marina & Shipyard, Marina del Rey. In result, This study suggests that in order to improve the current situation of Korean marinas, it is necessary to expand the infrastructure of marinas fit for regional characteristics not only marina facilities but also convenient facilities of marina hinterland to create marina city. It also needs to train professional manpower to meet the high demand of marine leisure & sport tourism. As the last it needs to broaden the base of visitors covering all the ages by diversifying marina contents, training, sailing, sport event programs as well as coordinate tourism program connecting tourist attractions in the regions.

Comparison of energy consumption and excess post-exercise oxygen consumption according to Taekwondo Taegeuk Poomsae performance in Taekwondo players

정원상,선예린,박훈영,김성우,정회룡,박신애,김지수,임기원 한국운동영양학회 2023 Physical Activity and Nutrition (Phys Act Nutr) Vol.27 No.1

[Purpose] We compared and analyzed energy consumption and excess post-exercise oxygen consumption (EPOC) following Taekwondo Taegeuk Poomsae performances. [Methods] Forty-two healthy men who could perform Taegeuk Poomsae 1–8 Jangs were enrolled in this study. To reduce the impact of Poomsae, a random cross-design was used. The washout time was set to at least three days. Oxygen consumption (VO2) was monitored after performing each Poomsae until a reference line was resumed. Each Taegeuk Poomsae was performed at a speed of 60 bpm. [Results] There was no significant difference in VO2, carbon dioxide excretion, and heart rate after performing the Taegeuk Poomsae once; however, all variables increased significantly in combined results of EPOC metabolism (F<45.646, p<0.001, and ɳ2<0.527). Taegeuk 8 Jang had the highest levels of all the factors. There were noticeable variations in the oxidation of fat and carbohydrates throughout the Taegeuk Poomsae (F<9.250, p<0.001, ɳ2<0.184). Taegeuk 8 Jang demonstrated the greatest rate of carbohydrate oxidation, and 4–8 Jangs demonstrated much greater rates of fatty acid oxidation. Compared to 1 Jang, the energy consumption showed significant differences in all the variables and peaked in Taegeuk 8 Jang. [Conclusion] The energy consumption during the Poomsae performances was the same. When the EPOC metabolism was coupled, it was evident that more energy was substantially used in each chapter of Poomsae. Consequently, it was determined that when performing Poomsae, not only should energy metabolism during exercise be taken into account but also EPOC metabolism, which can increase by 10-fold.

Effect of a 12-week non-contact exercise intervention on body composition and health-related physical fitness in adults: a pilot test

김성우,최재호,선예린,서지수,정원상,박훈영,김지수,임기원 한국운동영양학회 2022 Physical Activity and Nutrition (Phys Act Nutr) Vol.26 No.3

[Purpose] The purpose of this study was to evaluate the effects of a 12-week non-contact exercise intervention on body composition and health-related physical fitness in adults. [Methods] One hundred adults were initially enrolled; however, ninety-seven participants (men: n = 41, wom- en: n = 56) completed the study. The non-contact exercise was performed for 12 weeks using a smart tracker (Charge 4, Fitbit, USA) and mobile phone applications. The non-contact exercise program included resistance, aerobic, and flexibility exercises. [Results] The results showed that percent body fat (F=4.993, p=.016, ηp2=.049), fat-free mass (F=4.690, p=.024, ηp2=.047), and skeletal muscle mass (F=5.623, p=.004, ηp2=.055) significantly changed during the intervention period. Further, significant increases were seen in hand grip strength (F=12.167, p<.001, ηp2=.112), sit-and-reach (F=20.497, p<.001, ηp2=.176), sit-ups (F=42.107, p<.001, ηp2=.305), and VO2max (F=4.311, p=.037, ηp2=.043). [Conclusion] Our findings suggest that 12 weeks of non-contact exercise improves body composition and health-related physical fitness. Wearable technologies encourage individuals to modify their lifestyles by increasing physical activity and achieving the goal of maintaining health conditions among adults.

Effect of exercise intervention using mobile healthcare on blood lipid level and health-related physical fitness in obese women: a randomized controlled trial

최재호,박훈영,선예린,서지수,이은주,김성우,김지수,임기원 한국운동영양학회 2023 Physical Activity and Nutrition (Phys Act Nutr) Vol.27 No.3

[Purpose] This study aimed to evaluate the effects of 12 weeks of non-face-to-face exercise intervention using mobile health (mHealth) on blood lipid levels and health-related physical fitness in obese women. [Methods] Thirty obese women (aged: 39.40 ± 11.07 years, percent body fat: 37.05 ± 5.15%) were enrolled, and all completed the study. Non-face-to-face exercises were performed for 12 weeks using a mHealth and smart tracker (Charge 4, Fitbit, USA). Participants were randomly assigned to an experimental (EXP) or control (CON) group. The 12-week exercise program using mHealth included resistance (twice a week for 60 min), aerobics (five times a week for 50 min), and flexibility (five times a week for 10 min). [Results] The results showed that high-density lipoprotein cholesterol (Post − Pre: 9.07 mg·dL−1, p < 0.001) and ratio of low-density to high-density lipoprotein cholesterol (Post − Pre: −0.71 mg·dL−1, p < 0.05) significantly changed during the intervention period in EXP. There were significant increases in sit-ups (Post − Pre: 7.73 numbers, p < 0.001), grip strength (Post − Pre: 2.92 kg, p < 0.001), and sit and reach (Post − Pre: 2.51 cm, p < 0.01) in EXP. [Conclusion] Non-face-to-face exercise using mHealth for 12 weeks improved blood lipid levels and health-related physical fitness; therefore, it can help improve compliance through self-monitoring and lifestyle changes by increasing physical activity.

Exogenous lactate intake immediately after endurance exercise increases time to exhaustion in VO2 Max measurements in mice

견성환,김지수,황든솔,장인권,최지희,김종원,정원상,황혜정,김성우,김지영,정경화,서지수,선예린,박훈영,임기원 한국운동영양학회 2023 Physical Activity and Nutrition (Phys Act Nutr) Vol.27 No.2

[Purpose] The purpose of the study was to investigate the effects of 4 weeks of lactate intake immediately after endurance exercise on maximal oxygen uptake (VO2 Max) in exercise performance. [Methods] Seven-week-old mice from the Institute of Cancer Research (ICR) were randomly divided into four groups: vehicle intake (SE/CON), lactate intake (SE/LAC), endurance exercise with vehicle intake (EX/ CON), and lactate intake with endurance exercise (EX/ LAC). Mice were subjected to 60-70% VO2 Max endurance exercise with or without oral lactate intake 5 days/ week for 4 weeks. VO2 Max measurements (VO2 Max, time to exhaustion (TTE), respiratory exchange rate, fat oxidation, and carbohydrate oxidation) were recorded at the end of the study period. After 48 h of VO2 Max measurement, the mice were sacrificed, and three different abdominal fat samples (epididymal, perirenal, and mesenteric) were collected. [Results] Body weight and abdominal fat mass did not differ between the groups. When measuring VO2 Max, endurance exercise raised VO2 Max, and lactate intake after endurance exercise increased TTE. The change in energy substrate utilization during VO2 Max measurement demonstrated that although the respiratory exchange rate and fat oxidation were enhanced by lactate intake, there were no synergistic effects of lactate intake and endurance exercise. [Conclusion] Lactate intake immediately after endurance exercises can improve exercise performance, indicating the benefit of long-term exogenous lactate intake as an exercise supplement.