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RISS 인기검색어
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- 저자 : 이형국(Hyungkook Lee) (검색결과 3 건)
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이형국(Hyungkook Lee) 한국발육발달학회 2014 한국발육발달학회지 Vol.22 No.4
The purpose of this experiment was to investigate that there are differences of 4 muscles of leg on iEMG and MDF in according to back squat ways, and exercise expertness. Subjects were 14 college male students, these were divided two groups. One was beginner in weight exercise, and the other was expert that they have trained the weight training more than 1 year. The sites of measuring in muscles were erector spine, gluteus maximus, quadriceps and hamstrings. They performed the three ways(without load, smith machine, and free weight) of back squat exercise and we measured iEMG and MDF. On iEMG, there were no significant difference among back squat exercise ways in intermediate level group. But, in intermediate level group there were significant difference among the four muscles within the back squat exercise ways respectively (p<.001, p<.01, p<.001). Also, there was the same result in beginner group(respectively p<.01, p<.05, p<.05). Especially, gluteus maximus was mainly contributed in intermediate level group, and the erector spine and gluteus maximus were mainly contributed in beginner group. On MDF, there was no significant difference between back squat exercise ways. in intermediate level group there was no significant difference among the four muscles within the back squat exercise ways, but in beginner group, there were significant difference among four muscles within the exercise ways respectively (p<.01, p<.01, p<.05).
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관절 저항운동의 세트간 휴식간격이 반복수, 운동자각도, 심박수에 미치는 영향
박준선(Joonsun Park),이형국(Hyungkook Lee) 한국발육발달학회 2017 한국발육발달학회지 Vol.25 No.1
The purpose of this study was to examine repetition number(RN), rating of perceived exertion(RPE) and heart rate(HR) with 1- and 2-minute rest intervals(RI) between sets of multi and single-joint resistance exercise. Ten recreationally trained men(age:21.4±1.9yr, weight:76.5±8.3kg, height:177.4±8.0cm, body fat:15.9±2.3%, BMR:24.3±1.2kg/㎡) were participated in this study. The participants had more than approximately 6 months of consistent resistance training experience. During the familiarization sessions, they were tested for 10 and one repetition maximum(RM) in Pec dec fly(PD) and Bench press(BP) and for HR(Polar Fitness test and Polar OwnOptimizer). They performed two exercises in a main sessions with an interval of 48-72 hrs between two main sessions. The following protocols were performed in random order with 10RM loads and 4 sets for PD and BP; (a)PD with 1-min (b)PD with 2-min (c)BP with 1-min (d)BP with 2-min. The results indicated that for PD, number of repetitions(NR) was significant difference among sets in compared to 1 set at 1-min and 2-min RI(respectively, p<.001). Additionally, also significant difference was showed between RIs at set 3 and set 4(respectively, p<.01). And, rating of perceived exertion(RPE) was significant difference among sets in compared to 1 set at 1-min and 2-min RI(respectively, p<.001). Heart rate was significant difference among sets in compared to 1 set at 1-min and 2-min RI(respectively, p<.001, p<.01). For BP, number of repetitions(NR) was significant difference among sets in compared to 1 set at 1-min and 2-min RI(respectively, p<.001). Additionally, also significant difference was showed between RIs at set 4(p<.05). And, rating of perceived exertion(RPE) was significant difference among sets in compared to 1 set at 1-min and 2-min RI(respectively, p<.001). Heart rate was significant difference among sets in compared to 1 set at 1-min and 2-min RI(respectively, p<.001, p<.05). Therefore, it is not a good idea to prescribe with 1-and 2-min RI, regardless of joints, in resistance training program for hypertrophy when intermediate exercisers perform.
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