Effects of Robot-assisted Gait With Body Weight Support on Torque, Work, and Power of Quadriceps and Hamstring Muscles in Healthy Subjects
0
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
Background: Robot-assisted gait training (RAGT) is an effective method for walking reha-bilitation. Additionally, the body weight support (BWS) system reduces muscle fatigue while walking. However, no previous studies have investigated the effects of RAGT with BWS on isokinetic strength of quadriceps and hamstring muscles. Objects: The purpose of this study was to investigate the effects of torque, work, and power on the quadriceps and hamstring muscles during RAGT, using the BWS of three conditions in healthy subjects. The three different BWS conditions were BWS 50%, BWS 20%, and full weight bearing (FWB). Methods: Eleven healthy subjects (7 males and 4 females) participated in this study. The Walkbot_S was used to cause fatigue of the quadriceps and hamstring muscles and the Biodex Systems 4 Pro was used to measure the isokinetic torque, work, and power of them. After RAGT trials of each of the three conditions, the subjects performed isokinetic concentric knee flexion and extension, five at an angular velocity of 60°/s and fifteen at an angular velocity of 180°/s. One-way repeated analysis of variance was used to determine significant differences in all the variables. The least significant difference test was used for post-hoc analysis. Results: On both sides, there were significant differences in peak torque (PT) of knee exten-sion and flexion between the three BWS conditions at an angular velocity of 60°/s and 180°/s conditions. A post-hoc comparison revealed that the PT in the BWS 50% was significantly greater than in the BWS 20% and the FWB and the PT in the BWS 20% was significantly greater than in the FWB. Conclusion: The results of this study suggest that the lower BWS during RAGT seems to lower the isokinetic torque, work, and power of the quadriceps and hamstring muscles be-cause of the muscle fatigue increase.
Abstract
Background: Robot-assisted gait training (RAGT) is an effective method for walking reha-bilitation. Additionally, the body weight support (BWS) system reduces muscle fatigue while walking. However, no previous studies have investigated the effects of RAGT with BWS on isokinetic strength of quadriceps and hamstring muscles. Objects: The purpose of this study was to investigate the effects of torque, work, and power on the quadriceps and hamstring muscles during RAGT, using the BWS of three conditions in healthy subjects. The three different BWS conditions were BWS 50%, BWS 20%, and full weight bearing (FWB). Methods: Eleven healthy subjects (7 males and 4 females) participated in this study. The Walkbot_S was used to cause fatigue of the quadriceps and hamstring muscles and the Biodex Systems 4 Pro was used to measure the isokinetic torque, work, and power of them. After RAGT trials of each of the three conditions, the subjects performed isokinetic concentric knee flexion and extension, five at an angular velocity of 60°/s and fifteen at an angular velocity of 180°/s. One-way repeated analysis of variance was used to determine significant differences in all the variables. The least significant difference test was used for post-hoc analysis. Results: On both sides, there were significant differences in peak torque (PT) of knee exten-sion and flexion between the three BWS conditions at an angular velocity of 60°/s and 180°/s conditions. A post-hoc comparison revealed that the PT in the BWS 50% was significantly greater than in the BWS 20% and the FWB and the PT in the BWS 20% was significantly greater than in the FWB. Conclusion: The results of this study suggest that the lower BWS during RAGT seems to lower the isokinetic torque, work, and power of the quadriceps and hamstring muscles be-cause of the muscle fatigue increase.
참고문헌 (40)
- Colombo G, "Treadmill training of paraplegic patients using a robotic orthosis", J Rehabil Res Dev, 37(6), pp.693~700 (2000)
- Jezernik S, "Robotic orthosis lokomat: a rehabilitation and research tool", Neuromodulation, 6(2), pp.108~115 (2003)
- Lo AC, "Improving gait in multiple sclerosis using robot-assisted, body weight supported treadmill training", Neurorehabil Neural Repair, 22(6), pp.661~671 (2008)
- Pietrusinski M, "Robotic gait rehabilitation trainer", IEEE ASME Trans Mechatron, 19(2), pp.490~499 (2014)
- Lu Q, "A new active body weight support system capable of virtually offloading partial body mass", IEEE ASME Trans Mechatron, 18(1), pp.11~20 (2013)
- Barbeau H, "Optimal outcomes obtained with bodyweight support combined with treadmill training in stroke subjects", Arch Phys Med Rehabil, 84(10), pp.1458~1465 (2003)
- Sienna PA, "One rep max: a guide to beginning weight training" (1989), Benchmark Press
- Davies RA, "Isolated-joint testing & exercise: a handbook for using Cybex 770 and the U.B.X.T" (1985), Lumec
- Davies GJ, "A compendium of isokinetics in clinical usage and rehabilitation techniques" (1992), S & S Publishers
- Gray JC, "Percent decline in peak torque production during repeated concentric and eccentric contractions of the quadriceps femoris muscle", J Orthop Sports Phys Ther, 10(8), pp.309~314 (1989)
- Lepers R, "The effects of a prolonged running exercise on strength characteristics", Int J Sports Med, 21(4), pp.275~280 (2000)
- Nilsson J, "Fatigue and EMG of repeated fast voluntary contractions in man", Acta Physiol Scand, 101(2), pp.194~198 (1977)
- Thorstensson A, "Fatiguability and fibre composition of human skeletal muscle", Acta Physiol Scand, 98(3), pp.318~322 (1976)
- Denadai BS, "Effects of high intensity running to fatigue on isokinetic muscular strength in endurance athletes", Isokinetics and Exercise Science, 15(4), pp.281~285 (2007)
- Glace BW, "Effects of a 2-hour run on metabolic economy and lower extremity strength in men and women", J Orthop Sports Phys Ther, 27(3), pp.189~196 (1998)
- Sherman WM, "Effect of a 42.2-km footrace and subsequent rest or exercise on muscular strength and work capacity", J Appl Physiol Respir Environ Exerc Physiol, 57(6), pp.1668~1673 (1984)
- Banala SK, "Robot assisted gait training with active leg exoskeleton (ALEX)", IEEE Trans Neural Syst Rehabil Eng, 17(1), pp.2~8 (2009)
- Beyl P, "Design and control of a lower limb exoskeleton for robotassisted gait training", Applied Bionics and Biomechanics, 6(2), pp.229~243 (2009)
- Cao J, "Control strategies for effective robot assisted gait rehabilitation: the state of art and future prospects", Med Eng Phys, 36(12), pp.1555~1566 (2014)
- Hussain S, "Robot assisted treadmill training:mechanisms and training strategies", Med Eng Phys, 33(5), pp.527~533 (2011)
- Koenig A, "Psychological state estimation from physiological recordings during robot-assisted gait rehabilitation", J Rehabil Res Dev, 48(4), pp.367~385 (2011)
- Nakanishi Y, "Rapid changes in arousal states of healthy volunteers during robot-assisted gait training: a quantitative time-series electroencephalography study", J Neuroeng Rehabil, 11, pp.59~ (2014)
- Gordon KE, "The importance of using an appropriate body weight support system in locomotor training", Soc Neurosci, 26(1), pp.160~ (2000)
- Frey M, "A novel mechatronic body weight support system", IEEE Trans Neural Syst Rehabil Eng, 14(3), pp.311~321 (2006)
- Franz JR, "Physiological modulation of gait variables by an active partial body weight support system", J Biomech, 40(14), pp.3244~3250 (2007)
- Morone G, "Who may benefit from robotic-assisted gait training? A randomized clinical trial in patients with subacute stroke", Neurorehabil Neural Repair, 25(7), pp.636~644 (2011)
- Bonetti LV, "Isokinetic performance of knee extensor and flexor musculature in adolescent female handball players", Arch Med Deporte, 35(3), pp.157~161 (2018)
- Qin T, "Coordinated control strategy for roboticassisted gait training with partial body weight support", J Cent South Univ, 22(8), pp.2954~2962 (2015)
- Perry J, "Gait analysis: normal and pathological function" (2010), Slack
- Hessert MJ, "Foot pressure distribution during walking in young and old adults", BMC Geriatr, 5, pp.8~ (2005)
- Soucy MT, "Examining the effects of body weight support and speed on physiological measures and lower leg muscular activity", Master, pp.2016
- Riener R, "Locomotor training in subjects with sensori-motor deficits: an overview of the robotic gait orthosis lokomat", J Healthc Eng, 1(2), pp.197~216 (2010)
- Sherman WM, "Isokinetic rehabilitation after surgery. A review of factors which are important for developing physiotherapeutic techniques after knee surgery", Am J Sports Med, 10(3), pp.155~161 (1982)
- Sherman WM, "Isokinetic rehabilitation after meniscectomy:a comparison of two methods of training", Physician Sportsmed, 11(4), pp.121~133 (1983)
- Smith MJ, "Isokinetic versus isotonic variable-resistance training", Am J Sports Med, 9(4), pp.275~279 (1981)
- Timm KE, "Isokinetic exercise to 50% fatigue", J Orthop Sports Phys Ther, 8(10), pp.505~506 (1987)
- Dvir Z, "Average or peak moment: which of the two is more suitable to represent isokinetic muscle strength?", Isokinet Exerc Sci, 5(2), pp.93~97 (1995)
- Dvir Z, "Isokinetics: muscle testing, interpretation, and clinical applications" (2004), Churchill Livingstone
- Hwang JH, "Effects of abdominal hollowing and bracing maneuvers on hip extension strength in prone standing position", Isokinet Exerc Sci, 28(2), pp.161~169 (2020)
- Van Kammen K, "The combined effects of body weight support and gait speed on gait related muscle activity: a comparison between walking in the Lokomat exoskeleton and regular treadmill walking", PLoS One, 9(9), pp.e107323~ (2014)
