The effect of visual feedback on EMG activity of the knee joint muscles during closed kinetic chain exercise

2019 ◽  
Vol 11 (1) ◽  
pp. 5-11
Author(s):  
Kwon-Young Kang ◽  
Keyword(s):  
Knee Joint ◽  
Visual Feedback ◽  
Emg Activity ◽  
Kinetic Chain ◽  
Closed Kinetic Chain

Quadriceps-hamstring EMG activity during functional, closed kinetic chain exercise to fatigue

2000 ◽  
Vol 81 (6) ◽  
pp. 504-509 ◽  
Author(s):  
Danny M. Pincivero ◽  
Craig Aldworth ◽  
Tom Dickerson ◽  
Cheri Petry ◽  
Terry Shultz
Keyword(s):  
Emg Activity ◽  
Kinetic Chain ◽  
Closed Kinetic Chain

Effect of a Neoprene Sleeve on Knee Joint Position Sense During Sitting Open Kinetic Chain and Supine Closed Kinetic Chain Tests

1998 ◽  
Vol 26 (4) ◽  
pp. 562-566 ◽  
Author(s):  
Trevor B. Birmingham ◽  
John F. Kramer ◽  
J. Tim Inglis ◽  
Colleen A. Mooney ◽  
Lisa J. Murray ◽  
...  
Keyword(s):  
Knee Joint ◽  
Test Performance ◽  
Position Sense ◽  
Joint Position Sense ◽  
Primary Objective ◽  
Future Research ◽  
Joint Position ◽  
Kinetic Chain ◽  
Open Kinetic Chain ◽  
Closed Kinetic Chain

The primary objective of the present study was to compare the effect of a neoprene sleeve on knee joint position sense during a sitting open kinetic chain test and a supine closed kinetic chain test. Young (24 2 years old), healthy subjects (18 men and 18 women) performed knee joint angle replication tests during open kinetic chain knee extension (sitting) and closed kinetic chain leg press (supine with an axial load of 15% body weight) before and after application of a neoprene sleeve over the dominant knee. The improvement in ability to replicate joint angles after application of the sleeve (sleeve effect) was significantly less during the supine closed kinetic chain test (0.3° 1.4°) than during the sitting open kinetic chain test (1.2° 1.1°). The sleeve effect was inversely related to subjects' performance without the sleeve during both the sitting open kinetic chain and supine closed kinetic chain tests, suggesting that some people may derive greater benefit from the sleeve than others. Although the sleeve effects were small, particularly during the supine closed kinetic chain test, 72% of subjects felt that the sleeve improved their overall test performance. Future research is needed to establish the functional relevance of the small sleeve effects observed and to identify the characteristics of people who might derive greatest benefit from sleeve use.

Validity and Reliability of a Digital Inclinometer to Assess Knee Joint-Position Sense in a Closed Kinetic Chain

2017 ◽  
Vol 26 (1) ◽  
Author(s):  
Natalia Romero-Franco ◽  
Juan Antonio Montaño-Munuera ◽  
Pedro Jiménez-Reyes
Keyword(s):  
Knee Joint ◽  
Intraclass Correlation ◽  
Position Sense ◽  
Joint Position Sense ◽  
Joint Position ◽  
Kinetic Chain ◽  
Validity And Reliability ◽  
Digital Inclinometer ◽  
Closed Kinetic Chain ◽  
Very High

Context: Knee joint-position sense (JPS) is a key parameter for optimum performance in many sports but is frequently negatively affected by injuries and/or fatigue during training sessions. Although evaluation of JPS may provide key information to reduce the risk of injury, it often requires expensive and/or complex tools that make monitoring proprioceptive deterioration difficult. Objective: To analyze the validity and reliability of a digital inclinometer to measure knee JPS in a closed kinetic chain (CKC). Design: The validity and intertester and intratester reliability of a digital inclinometer for measuring knee JPS were assessed. Setting: Biomechanics laboratory. Participants: 10 athletes (5 men and 5 women; 26.2 ± 1.3 y, 71.7 ± 12.4 kg; 1.75 ± 0.09 m; 23.5 ± 3.9 kg/m2). Intervention: Knee JPS was measured in a CKC. Main Outcome Measures: Absolute angular error (AAE) of knee JPS in a CKC. Results: Intraclass correlation coefficient (ICC) and standard error of the mean (SEM) were calculated to determine the validity and reliability of the inclinometer. Data showed that the inclinometer had a high level of validity compared with an isokinetic dynamometer (ICC = 1.0, SEM = 1.39, P < .001), and there was very good intra- and intertester reliability for reading the inclinometer (ICC = 1.0, SEM = 0.85, P < .001). Compared with AutoCAD video analysis, inclinometer validity was very high (ICC = 0.980, SEM = 3.46, P < .001) for measuring AAE during knee JPS in a CKC. In addition, the intertester reliability of the inclinometer for obtaining AAE was very high (ICC = .994, SEM = 1.67, P < .001). Conclusion: The inclinometer provides a valid and reliable method for assessing knee JPS in a CKC. Health and sports professionals could take advantage of this tool to monitor proprioceptive deterioration in athletes.

Development of a Dynamic Knee Simulator

2008 ◽  
Author(s):  
Andrew Dauster ◽  
Mohamed Samir Hefzy ◽  
Ethan Hauser ◽  
Philip Nowicki
Keyword(s):  
Knee Joint ◽  
Lower Limb ◽  
Large Range ◽  
Horizontal Position ◽  
Kinetic Chain ◽  
Knee Simulator ◽  
Closed Kinetic Chain ◽  
Analog Systems ◽  
Deep Squat ◽  
Joint Motions

Dynamic knee simulators use muscle analogs to incite motion at the knee joint [1–5]. There is a great variation between simulators in choice of powering of muscle analog systems, what movements are fixed, controlled, or unconstrained, as well as whether or not the system is open or closed kinetic chain. The objective of this work is to develop a portable dynamic knee simulator that allows simulation of knee joint motions when it is maximally flexed during a large range of activities involving the lower limb in both a vertical (e.g. deep squat) as well an horizontal position (e.g. rowing).

Comparison of Open versus Closed Kinetic Chain Test Positions for Measuring Joint Position Sense

1995 ◽  
Vol 4 (3) ◽  
pp. 165-171 ◽  
Author(s):  
Susan B. Andersen ◽  
Donna M. Terwilliger ◽  
Craig R. Denegar
Keyword(s):  
Knee Joint ◽  
Repeated Measures ◽  
Knee Flexion ◽  
Position Sense ◽  
Joint Position Sense ◽  
Joint Position ◽  
Kinetic Chain ◽  
Test Position ◽  
Closed Kinetic Chain ◽  
Open Versus

The purpose of this study was to determine if a difference exists in the reproducibility of knee joint flexion angles in an open versus a closed kinetic chain. Thirty generally healthy subjects (12 males, 18 females; mean age 23.8 years) participated. Subjects actively reproduced small, medium, and large knee flexion angles (with target angles of 15°, 45°, and 75°, respectively) in an open and a closed kinetic chain while being videotaped. Goniometric measurements were taken from the videotape of initial and reproduced joint angles. Data were analyzed using ANOVA with repeated measures on kinetic chain test position and joint angle. Subjects more accurately reproduced knee flexion angles in a closed kinetic chain position. The main effect for angle and the interaction of angle and test position were nonsignificant. The results indicate that knee joint position is more accurately reproduced in closed kinetic chain. Closed kinetic chain testing is also a more functional assessment of joint position sense, and thus closed kinetic chain assessment of lower extremity joint position sense is recommended.

scholarly journals Optimal activation ratio of the scapular muscles in closed kinetic chain shoulder exercises: A systematic review

2020 ◽  
pp. 1-14
Author(s):  
Guillermo Mendez-Rebolledo ◽  
Juan Morales-Verdugo ◽  
Ignacio Orozco-Chavez ◽  
Fernanda Assis Paes Habechian ◽  
Eleazar Lara Padilla ◽  
...  
Keyword(s):  
Systematic Review ◽  
Methodological Quality ◽  
Correct Selection ◽  
Cochrane Library ◽  
Emg Activity ◽  
Electromyographic Activity ◽  
Kinetic Chain ◽  
Closed Kinetic Chain ◽  
Activation Ratio ◽  
Push Up

BACKGROUND: Muscle synergies contribute to scapular position during arm movement. The trapezius and serratus anterior (SA) muscles are the main stabilizers and are therefore the main target muscles of therapeutic exercises. OBJECTIVE: To systematically review the current literature investigating the optimal activation ratio of the scapular muscles during a range of closed kinetic chain exercises. METHODS: A systematic review search was conducted to identify studies reporting shoulder electromyography (EMG) activity during rehabilitation exercises in healthy participants. The search was conducted in PubMed, Cochrane Library, MEDLINE, CINAHL, Scopus, SPORTDiscus, and ScienceDirect. The included studies reported closed kinetic chain exercises and the muscle activity as a percentage of maximum voluntary isometric contraction (%MVIC) or muscle ratios of the lower trapezius (LT), middle trapezius (MT), and SA with respect to the upper trapezius (UT). Muscle ratios were classified as optimal if they were equal to or lower than 0.6, and the adapted Newcastle-Ottawa Scale (NOS) was used to evaluate the methodological quality of the selected studies. RESULTS: Twenty-nine studies were included in this review; 7 main exercises and 30 variations of these were reported. The average electromyographic activity of the concentric and eccentric phase was considered. Half Push Up, Push Up Plus, and Scap Protraction exercises showed optimal SA activity (UT/SA < 0.6), while Press Up, Half Push Up, and One Hand Plank exercises showed optimal LT activity (UT/LT < 0.6). According to the NOS, 15 studies were classified as moderate methodological quality. CONCLUSIONS: The exercises in higher positions (e.g. exercises with the trunk closest to the vertical line) or unstable surfaces tend to favor UT activity over the MT, LT and SA. The exercises including scapular retraction showed optimal UT/MT and UT/LT ratios, while those including scapular protraction showed optimal UT/SA ratios. This will assist therapists in the correct selection of exercises for shoulder rehabilitation.

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