• 국제물리치료학회지
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• 제2권1호
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• pp.237-243
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• 2011

This study was to examine on the respiratory variables, heart rate and muscle activity between the static recovery and dynamic recovery after progressive resistance exercise to maximal point. Subjects were 15 students enrolled in N University. All were tested two times (static recovery and dynamic recovery) and were requested to perform a walking on a treadmill after progressive resistance exercise to maximal point. Electromyography(EMG) was used to monitor the muscle activity(TA: Tibialis Anterior, MG: Medial Gastrocnemius) during gait. CPEX-1 was used to measure the respiratory variables and heart rate. The dynamic recovery group was shown the significant lower heart rate than that of static recovery group at during gait. Respiratory rate showed statistically a significant difference. Electromyography(RMS, root mean square) showed a non-significant difference. But the dynamic recovery group of muscle activity was found highly in TA and MG. This study indicated that the dynamic recovery method evidenced more faster than the static recovery method. And this type of dynamic rest by walking can be a help of recovery after exercise.

• International Journal of Internet, Broadcasting and Communication
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• 제14권4호
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• pp.222-227
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• 2022

The purpose of this study was to investigate changes in heart rate according to recovery methods after circuit weight training exercise. Fourteen men in their twenties were selected as subjects, and three sets of circuit weight training were performed by cycling six sports, and two recovery conditions (dynamic and static) were performed immediately after exercise. Changes in heart rate did not have an interactive effect according to recovery method and time, and both conditions showed significant changes between sets 1 and 2, and between sets 3 and after recovery. In this study, the high heart rate of 2 sets and 3 sets was seen as a result of exercise stimulation, and the low heart rate of 1 set was thought to be due to the decrease in vagus nerve activity rather than the role of catecholamines. On the other hand, the heart rate after 20 minutes of exercise did not show any difference according to the recovery method, which could mean that the recovery process due to the aquatic environment can act more strongly than the process of dynamic recovery and static recovery. It is thought that the characteristics affected the sensory and circulation of the body, and thus the change of the afferent signal and the level of metabolic products generated in the active muscle.

• 수산해양기술연구
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• 제28권2호
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• pp.157-163
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• 1992

In this paper, the relationship between static pressure recovery and turbulent energy was presented in case of swirling flows into a conical diffuser. The distributions of turbulent energy in a diffuser sectional area were measured by a hot wire anemometer. The following conclusion can be drawn from the experiment. Diffuser loss is constituted by a dynamic pressure loss and total pressure loss. The static pressure recovery depends strongly on the total pressure loss. The static pressure recovery depends strongly on the total pressure loss, and the turbulent energy varies inversely as the static pressure recovery coefficient.

• 한국융합학회논문지
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• 제12권12호
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• pp.401-409
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• 2021

이 연구는 천안시 태조산의 산림 경사 트레킹 시 80bpm 및 130+30bpm의 속도로 걷기 운동 후 정적회복 및 동적회복방법이 회복 중 심박수, 혈중젖산농도, 혈중글루코스에 미치는 영향을 분석하여 산림환경의 경사 트레킹 후 효율적인 회복방법을 알아보고자 하였다. 걷기 운동을 하는데 이상이 없는 20-30대 남자 9명을 대상으로 80bpm 속도와 130+30bpm 속도로 트레킹 후 정적회복방법과 동적회복방법에 따라 얻은 결과를 이원 반복측정 분산분석(Two-way repeated ANOVA)방법으로 분석하였으며, 유의한 차이가 나는 경우 contrast의 repeated 방법을 적용하여 비교 분석하였다. 80bpm 조건에서의 심박수는 방법(p=.008)과 시기(p=.000)에 따라 유의한 차이가 있었으며, 혈중젖산농도는 회복방법에 따라 유의한 차이가 없었으나(p=.401), 시기에 따라 유의한 차이가 나타났다(p=.000). 혈중글루코스는 회복방법에 따라 유의한 차이가 나타나지 않았으며(p=.093), 정적회복방법의 시기에서 유의한 차이가 나타났다(p=.002). 130bpm+30bpm 조건에서의 심박수는 방법(p=.002)과 시기(p=.000)에 따라 유의한 차이가 있었으며, 혈중젖산농도는 방법(p=.001)과 시기(p=.000)에 따라 유의한 차이가 나타났고, 혈중글루코스농도는 방법(p=.721)과 시기(p=090)간 유의한 차이가 나타나지 않았다.

• 대한산업공학회지
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• 제5권2호
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• pp.21-36
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• 1979

Static muscle contractions when prolonged or frequently repeated result in discomfort, fatigue, and musculosketal injuries. An analytic and quantitative model has been developed in order to expand the working knowledge on muscle fatigue. In this paper, three Markov models of muscle fatigue are developed. These models are based on motor unit fatigue-recovery characteristics obtained from information on motor unit behavior as it relates to fatigue and graded exertions. Three successively more realistic models are developed that involve: (1) homogeneous motor units with intensity-dependent fatigue rates and state-independent recovery rates (the HMSI model); (2) homogeneous motor units, intensity-dependent fatigue rates and state-dependent recovery rates (the HMSD model); and (3) non-homogeneous motor units (i.e., Type S and Type F), intensity-dependent fatigue rates and state-dependent recovery rates (the HMSD model). The result indicate that a simple stochastic model provide a means to analyze the complex nature of muscle fatigue in sequential static exertions.

• Archives of Reconstructive Microsurgery
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• 제14권1호
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• pp.14-17
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• 2005

Purpose: Authors have performed free tissue transplantation in the upper and lower extremities with sensory flaps and evaluated the sensory function recovery. Materials and methods: Between 1992 through 2004, sensory free flap articles published in the journal of the Korean microsurgical society, were reviewed and recovery of sensory function was assessed by static two-point discrimination test. Results: Static two point discrimination test showed average 6.7 mm in the thumb, average 12 mm in the hand and 7 cm of the dorsalis pedis flap, 20.5 mm of the lateral arm flap and over 8 cm of the forearm flap in the foot. Conclusion: Sensory flaps provide the protective and useful coverage in the upper and lower extremities and have benefit for activities for daily life in free tissue transferred patients.

• 대한물리의학회지
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• 제4권1호
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• pp.23-30
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• 2009

Purpose : This study was investigated the effect of static balance recovery during open kinetic chain exercise (OKC) and closed kinetic chain exercise(CKC). Methods : The paticipants were consisted of forty-one, was perform 3 sets, 3 times per week for 6 weeks, balance was measured by GOOD BALANCE. Statistical analysis was used repeated measure two-way ANOVA and independent t-test. Results : In CKC group, Center of presure(COP) medial-lateral(ML) velocity was significantly increased post 6 week test than pre-test, post 2 week test. COP anterior-posterior(AP) velocity was significantly increased post 6 week test than pre-test (p<.05). Conclusion : It was found that both OKC and CKC was significantly increased balance recovery in normal younng adults. In further study, it was suggested that was regard patient with muscle weakness.

• 수산해양기술연구
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• 제28권2호
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• pp.151-156
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• 1992

The purpose of this paper is to investigate the relationship between static pressure recovery and velocity distributions in case of swirling flow into a conical diffuser. In this research, velocity distribution is measured by a multi-hole yaw-meter. The following conclusions can be drawn from the experiments. (1) The static pressure recovery depends strongly on the strength of a swirl. (2) A high pressure recovery coefficient is achieved by inserting a solid core into the diffuser center.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2004년도 춘계학술대회
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• pp.1613-1618
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• 2004

Diffuser is an important fluid-mechanical equipment to convert kinetic energy into pressure energy. Many of the experimental and theoretical researches have been done in a diffuser but the understanding of energy transfer and detailed mechanism of energy dissipation is unclear. In this study, computations were performed using a numerical method with SIMPLE algorithm for conical diffuser with various diffuser angles and diffuser lengths. Also, we investigated the pressure recovery coefficient in conical diffuser by inserting strut. In this paper, we showed that the strut can cause a rising pressure recovery.

• 제어로봇시스템학회논문지
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• 제14권3호
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• pp.307-317
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• 2008

Relaxed static stability(RSS) concept has been applied to improve aerodynamic performance of modem version supersonic jet fighter aircraft. Therefore, flight control system are necessary to stabilize an unstable aircraft and provides adequate handling qualities. Also, flight control systems of modem version aircraft employ a safety system to support emergency situations such as a pilot unknown attitude flight conditions of an aircraft in night flight-testing. This situation is dangerous because the aircraft can lose if the pilot not take recognizance of situation. Therefore, automatic recovery system is necessary. The system called the "Pilot Activated Recovery System" or PARS, provided a pilot initiated automatic maneuver capable of an aircraft recoveries in situations of unusual attitudes. This paper addresses the concept of PARS and designed using nonlinear control law design process based on model of supersonic jet trainer. And, this control law is verified by nonlinear analysis and real-time pilot evaluation using in-house software. The result of evaluation reveals that the PARS support recovery of an aircraft unusual attitude and improve a safety of an aircraft.