The effects of open and closed kinetic chain exercises on the static and dynamic balance of the ankle joints in young healthy women

Yoo, Kyung-Tae

doi:10.1589/jpts.29.845

Cited by 8 publications

(7 citation statements)

References 26 publications

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“…The reduction could be explained by the following principles: closed-chain exercise and energy transmission. During closed chain exercise, a limb is fixed while other body parts freely move; hence any motion in one joint in a kinematic chain influences other joints in the chain 47 , 48 . In our experiment, the squat can be considered a closed-chain exercise where ankle joint assistance affected other joints in the chain, including quadriceps muscle 43 , 49 , 50 .…”

Section: Discussionmentioning

confidence: 99%

Muscle coordination and recruitment during squat assistance using a robotic ankle–foot exoskeleton

Jeong

Haghighat

Kantharaju

et al. 2023

Sci Rep

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Squatting is an intensive activity routinely performed in the workplace to lift and lower loads. The effort to perform a squat can decrease using an exoskeleton that considers individual worker’s differences and assists them with a customized solution, namely, personalized assistance. Designing such an exoskeleton could be improved by understanding how the user’s muscle activity changes when assistance is provided. This study investigated the change in the muscle recruitment and activation pattern when personalized assistance was provided. The personalized assistance was provided by an ankle–foot exoskeleton during squatting and we compared its effect with that of the no-device and unpowered exoskeleton conditions using previously collected data. We identified four main muscle recruitment strategies across ten participants. One of the strategies mainly used quadriceps muscles, and the activation level corresponding to the strategy was reduced under exoskeleton assistance compared to the no-device and unpowered conditions. These quadriceps dominant synergy and rectus femoris activations showed reasonable correlations (r = 0.65, 0.59) to the metabolic cost of squatting. These results indicate that the assistance helped reduce quadriceps activation, and thus, the metabolic cost of squatting. These outcomes suggest that the muscle recruitment and activation patterns could be used to design an exoskeleton and training methods.

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Section: Discussionmentioning

confidence: 99%

Muscle coordination and recruitment during squat assistance using a robotic ankle–foot exoskeleton

Jeong

Haghighat

Kantharaju

et al. 2023

Sci Rep

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“…The results of the current study regarding postural stability coincided with other studies. [18][19][20][21] Rajgor and Solanki studied the efficacy of balance exercises on postural instability in 30 young, obese adults (18-25 yrs). The findings revealed improvements in static and dynamic balance.…”

Section: Discussionmentioning

confidence: 99%

Adding Weight Shift Training to Weight Reduction Decreases the Risk of Falling in Obese Women

Abdel-Aal

Ibrahim

Samaha

et al. 2023

Am J Phys Med Rehabil

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Objective The aim of this study was to examine the effect of adding weight shift training to a weight loss program on the risk of falling, fear of falling, overall stability, anteroposterior stability, mediolateral stability, and isometric knee torque in young obese women. Design A single-blinded, randomized controlled study was performed. Sixty women, 18 to 46 yrs old, were randomly assigned either to the study or the control group. The participants in the study group were given weight-shifting training plus a weight reduction program; the control group received only a weight-reduction program. The interventions were performed for 12 wks. At baseline and after 12 wks of training, the risk of falling, fear of falling, overall stability, anteroposterior stability, mediolateral stability, and isometric knee torque were all examined. Results There were statistically significant differences in risk of falling, fear of falling, isometric knee torque, and overall, anteroposterior, and mediolateral stability indices, in favor of the study group, after 3 mos of training (P < 0.001). Conclusions Weight shift training combined with weight reduction was more beneficial than weight reduction alone in decreasing the risk of falling and fear of falling and improving isometric knee torque and overall, anteroposterior, and mediolateral stability indices. It could be used for treating balance problems and weakness around the knee joint in obese women. To Claim CME Credits Complete the self-assessment activity and evaluation online at http://www.physiatry.org/JournalCME CME Objectives Upon completion of this article, the reader should be able to: (1) Determine the impact of weight shift training on risk of falling and postural stability in obese women; (2) Identify the effect of weight shift training on fear of falling in adult women with obesity; and (3) Verify the additive effect of weight shift training to weight reduction program vs. weight reduction program alone on muscle strength in young obese women. Level Advanced Accreditation The Association of Academic Physiatrists is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The Association of Academic Physiatrists designates this Journal-based CME activity for a maximum of 1.0 AMA PRA Category 1 Credit(s)™. Physicians should only claim credit commensurate with the extent of their participation in the activity.

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“…For measurements of static stability, external perturbation, and for dynamic stability, a computerized balance platform (BT4; HUR Labs Oy, Tampere, Finland) was used [12]. Postural sway velocity and area was assessed with the eyes open and eyes closed condition while standing on the balance platform for 30 seconds for static stability [13]. The subject stood on the balance platform with their legs shoulder-width apart and looked straight ahead.…”

Section: Methodsmentioning

confidence: 99%

“…As for the external perturbation, 10 seconds (before and after 5 seconds at the time external perturbation occurred by the gym ball) were excluded from the 30-second measurement time frame. Dynamic stability was measured with limits of stability (LOS) in the forward, backward, left, and right side for 8 seconds, re-spectively [13]. When the LOS were measured, the subject's feet were aligned along the marked point of the medial malleolus printed on the platform, and their center of pressure was placed as a curve shown in the first position on a computer monitor.…”

Section: Methodsmentioning

confidence: 99%

Changes of postural stability according to ankle fixation in healthy subjects

Jeong

Mun

Lee

et al. 2019

PTRS

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The purpose of this study was to examine the changes in postural stability according to ankle fixation in healthy university students. Design: Cross-sectional study. Methods: Thirty healthy subjects (15 males and 15 females, 20.13 years, 167.49 cm, 65.87 kg) were recruited on a voluntary basis. The BT4 system (HUR Laps Oy, Tampere, Finland) was used to measure the static (standing posture with eyes open and eyes closed) and dynamic (external perturbation and limits of stability (LOS) in the forward, backward, left, and right side) balance abilities. External perturbation was measured by the subject's postural sway velocity and area for 20 seconds after being impacted by a gym ball. Static and dynamic stabilities were measured with ankle joint fixation and non-fixation conditions. Ankle fixation was provided using Mueller tape on both ankle joints. Results: For static stability under the standing posture, there was no significant difference between standing with ankle joint fixation and non-fixation conditions. However, dynamic stability (external perturbation and LOS in the forward, backward, left, and right side) was significantly higher in the standing with the non-fixation condition compared to the standing with ankle joint fixation condition (p<0.05). Conclusions: Our results reveal that ankle joint fixation can influence dynamic stability during standing. Thus, we believe that this result provides basic information for making improvements in postural control and may be useful in balance training for fall prevention.

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The effects of open and closed kinetic chain exercises on the static and dynamic balance of the ankle joints in young healthy women

Cited by 8 publications

References 26 publications

Muscle coordination and recruitment during squat assistance using a robotic ankle–foot exoskeleton

Muscle coordination and recruitment during squat assistance using a robotic ankle–foot exoskeleton

Adding Weight Shift Training to Weight Reduction Decreases the Risk of Falling in Obese Women

Changes of postural stability according to ankle fixation in healthy subjects

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