[논문]오버핸드 그립과 언더핸드 그립, 무엇이 컨벤셔널 데드리프트에 효과적일까?

Kim, Jaeho; Yoon, Sukhoon

doi:10.5103/kjsb.2021.31.2.133

오버핸드 그립과 언더핸드 그립, 무엇이 컨벤셔널 데드리프트에 효과적일까?
Overhand Grip or Underhand Grip, which one is more Effective on Conventional Deadlift Movement? 원문보기

한국운동역학회지 = Korean journal of sport biomechanics, v.31 no.2, 2021년, pp.133 - 139

Kim, Jaeho (Department of Physical Education, Graduate School of Korea National Sport University) , Yoon, Sukhoon (Department of Community Sport, Korea National Sport University)

Abstract ▼ AI-Helper

Objective: This study aims to verify the conventional deadlift motions using by two different grips, thereby elucidating the grounds for effective training methods that can minimize the risk of injury. Method: Total of 18 healthy young adults were recruited for this study (age: 25.11±2.19 yrs., height: 175.67±5.22 cm, body mass: 78.5±8.09 kg, 1-RM: 125.75±19.48 kg). All participants were asked to perform conventional deadlift with two types of grips which are overhand grip (OG) and underhand grip (UG). In each grip, participant perform the deadlift with 50% and 80% of the pre-measured 1-RM. A 3-dimensional motion analysis with 8 infrared cameras and 3 channels of EMG was performed in this study. A two-way ANOVA (group × load) with repeated measure was used for statistical verification. The significant level was set at α=.05. Results: There were significant differences in grip type and weight on the right shoulder joint, and only significant difference in grip on the left shoulder joint (p<.05). The hip joint ROM was significantly increased as the weight increased in both types of grips on phase 1, while the ROM of hip joint was significantly decreased as the weight increased only in the case of OG on phase 2 (p<.05). In case of the OG, as the weight, increased significantly increased L1 ROM and L3 ROM were revealed on phase 1 and phase 2, respectively (p<.05). Moreover, as the weight increased, UG revealed significantly decreased L5 ROM on phase 1, while both grips showed significantly increased ROM on phase 2 (p<.05). In addition, the erector spinae and the biceps femoris, which are synergist for the motion, showed a significant difference in both types of grip according to the weight (p<.05). The muscle activity ratio of gluteus maximus/biceps femoris showed a significant difference only in the UG according to the weight (p<.05). Conclusion: In conclusion, beginners might be suggested to use the UG for maintaining the neutral state of the lumbar spine and focus on the gluteus maximus muscle, which is the main activation muscle. For the experts, it may recommend alternative use of the OG and UG according to the training purpose to minimize the compensation effect.

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표/그림 (6)

그림 Figure 1. The position of markers
표 Table 1. Mean ± SD of internal and external shoulder joint rotation angles at each event during conventional deadlift (unit: °)
표 Table 2. Mean ± SD of hip joint ROM in sagittal plane at each phase during conventional deadlift (unit: °)
표 Table 3. Mean ± SD of lumbar joint ROM in sagittal plane at each phase during conventional deadlift (unit: °)
표 Table 4. Mean ± SD of agonist and synergist muscle activation during conventional deadlift (unit: %MVIC)
표 Table 5. Mean ± SD of muscle activation ratio during conventional deadlift (unit: %)

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오버핸드 그립과 언더핸드 그립, 무엇이 컨벤셔널 데드리프트에 효과적일까?
Overhand Grip or Underhand Grip, which one is more Effective on Conventional Deadlift Movement? 원문보기

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오버핸드 그립과 언더핸드 그립, 무엇이 컨벤셔널 데드리프트에 효과적일까? Overhand Grip or Underhand Grip, which one is more Effective on Conventional Deadlift Movement? 원문보기

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오버핸드 그립과 언더핸드 그립, 무엇이 컨벤셔널 데드리프트에 효과적일까?
Overhand Grip or Underhand Grip, which one is more Effective on Conventional Deadlift Movement? 원문보기

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