JRM Vol.34 No.1 pp. 101-110
doi: 10.20965/jrm.2022.p0101


Mechanism and Effect of Tread Swing for Lower Limbs Strength Training Device

Takumi Tamamoto*1, Ken’ichi Koyanagi*1, Yoshinori Kimura*2, Maki Koyanagi*3, Akio Inoue*4, Tomoaki Murabayashi*1, Toru Oshima*1, Takuya Tsukagoshi*1, and Kentaro Noda*1

*1Department of Intelligent Robotics, Toyama Prefectural University
5180 Kurokawa, Imizu, Toyama 939-0398, Japan

*2Department of Rehabilitation, Osaka University Hospital
2-15 Yamadaoka, Suita, Osaka 565-0871, Japan

*3Department of Physical Therapy, Osaka Electro-Communication University
1130-70 Kiyotaki, Shijonawate, Osaka 575-0063, Japan

*4ER-tec Co.
2-1-31 Sakuragaoka, Minoh, Osaka 562-0046, Japan

September 8, 2020
September 28, 2021
February 20, 2022
lower limb, strength training, ACL injuries, tread swing
Mechanism and Effect of Tread Swing for Lower Limbs Strength Training Device

Lower limbs strength training by EBMO

The aim of this study was to propose a tread swing mechanism for lower-limb strength training devices and to confirm its effects. In the standing position and for training the lower limbs, if the tread-surface angle is inappropriate, the posture of the knee joints gets affected, and knee adduction/valgus moments, which result in knee stress, get generated. The target training exercises are the front-back leg scissors and open-close leg triangle exercises. With regard to the swing of the tread, it is necessary to realize a pitch/yaw rotation and a roll/yaw rotation for the former and the latter exercises, respectively. As a result, knee joint stress can be reduced by moving the center of pressure (COP). The proposed mechanism has a further differential mechanism that utilizes the difference between the pulley diameters. The translational movement force of the tread is transmitted as the torque of the swing motion for the pitch, roll, and yaw through the effects of a differential mechanism. The rate of the swing angle can be changed by adjusting the pulley diameter. As a result of evaluating the effect of exercises using a manufactured device, it was confirmed that the tread performed a predetermined swing motion. It was also confirmed that the COP position changed. Therefore, it is expected that knee joint stress will reduce. Rehabilitation and strength training that result in small knee joint stresses and generate large muscle load are in great demand for people experiencing knee joint failure.

Cite this article as:
Takumi Tamamoto, Ken’ichi Koyanagi, Yoshinori Kimura, Maki Koyanagi, Akio Inoue, Tomoaki Murabayashi, Toru Oshima, Takuya Tsukagoshi, and Kentaro Noda, “Mechanism and Effect of Tread Swing for Lower Limbs Strength Training Device,” J. Robot. Mechatron., Vol.34, No.1, pp. 101-110, 2022.
Data files:
  1. [1] K. C. Miyasaka, D. M. Daniel, and M. L. Stone, “The incidence of knee ligament injuries in the general population,” Am. J. Knee. Surg., pp. 3-8, 1991.
  2. [2] L. C. S. Mihata, A. I. Beutler, and B. P. Boden, “Comparing the Incidence of Anterior Cruciate Ligament Injury in Collegiate Lacrosse, Soccer, and Basketball Players: Implications for Anterior Cruciate Ligament Mechanism and Prevention,” the American J. of Sports Medicine, Vol.34, No.6, pp. 899-904, 2006.
  3. [3] F. R. Noyes and S. D. Barber-Westin, “Neuromuscular retraining intervention programs: Do they reduce noncontact anterior cruciate ligament injury rates in adolescent female athletes?,” the J. of Arthroscopic and Related Surgery, Vol.30, No.2, pp. 245-255, 2014.
  4. [4] R. A. Palmitier, K.-N. An et al., “Kinetic chain exercise in knee rehabilitation,” Sports Medicine, Vol.11, No.6, pp. 402-413, 1991.
  5. [5] M. C. Morrissey, W. I. Drechsler, D. Morrissey et al., “Effects of distally fixated versus nondistally fixated leg extensor resistance training on knee pain in the early period after anterior cruciate ligament reconstruction,” Physical Therapy, Vol.82, No.1, pp. 35-43, 2002.
  6. [6] M. C. Perry, M. C. Morrissey, J. B. King et al., “Effects of closed versus open kinetic chain knee extensor resistance training on knee laxity and leg function in patients during 8- to 14-week post-operative period after anterior cruciate ligament reconstruction,” Knee Surg. Sports Traumatol. Arthrosc., Vol.13, No.5, pp. 357-369, 2005.
  7. [7] K. Koyanagi, Y. Kimura, M. Koyanagi et al., “ERIK: an isokinetic exercise device for the lower limbs,” ROBOMECH J., Vol.5, No.1, 15, 2018.
  8. [8] T. Tamamoto, K. Koyanagi, Y. Kimura et al., “Tread-surface Swing Mechanism of Lower Limbs Strength Training Device,” Proc. of the 2019 IEEE/SICE Int. Symp. on System Integration, pp. 417-421, 2019.
  9. [9] Y. Yamamoto, K. Koyanagi, Y. Kimura et al., “Verification of Device Modes of a Strength Training Machine Using an Electrorheological Fluid Brake,” Proc. of the 2014 IEEE/SICE Int. Symp. on System Integration, pp. 779-784, 2014.
  10. [10] Y. Kimura, M. Koyanagi, K. Koyanagi et al., “Biomechanical analysis of single-leg squat with isokinetic and constant resistive force using controllable exercise equipment,” British J. of Sports Medicine, Vol.51, No.4, pp. 342-343, 2017.
  11. [11] T. Cotte and J. M. Ferret, “Comparative study of two isokinetics dynamometers: CYBEX NORM vs CON-TREX MJ,” Isokinetics and Exercise Science, Vol.11, pp. 37-43, 2003.
  12. [12] A. Akagi, S. Tsuichihara, S. Kosugi, and H. Takemura, “Development of a Rehabilitation and Training Device Considering the Ankle Degree of Freedom,” J. Robot. Mechatron., Vol.32, No.3, pp. 673-682, 2020.
  13. [13] K. Nomura, T. Yonezawa, H. Takemura, and H. Mizoguchi, “Development of Six-DOF Human Ankle Motion Control Device Using Stewart Platform Structure for Fall Prevention,” J. Robot. Mechatron., Vol.28, No.5, pp. 654-663, 2016.
  14. [14] J. Perry and J. M. Burnfield, “Gait analysis: normal and pathological function,” Slack Inc., 2012.

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Last updated on May. 20, 2022