The Effect of Variable Stiffness Exoskeleton on the Hip Muscle Groups during Walking

The purpose of the study was to describe the dance movements of the folk dance Tinikling which is the most popular traditional dance and former national dance of the Philippines. The researchers adopted the movement analysis method similar to that of Mackenzie that involves the (1) description of the actual movements which occur at the joints involved; (2) the plane in which the movement occurs; and (3) the muscles producing the movement (agonist & antagonist). In addition, the researchers also had done a mechanical analysis on the lever type involved in the execution of the dance movement in terms of force, axis, and resistance. The prominent dance steps in the Philippine local dance Tinikling are the (1) running, (2) tinikling steps, (3) diagonal step, and (4) straddle jump with a turn step. The joints involved are: hip muscle which is ball and socket type of joint; and knee and ankle which are hinge joints. The major muscles involved in the dance include mostly the lower body muscle groups such as the quadriceps, hamstring, gluts, adductor muscle group, and calves. The type of lever used in performing the dance comprise majority of 1st, 2nd and 3rd class levers. Thus, the Tinikling is a viable dance which could improve the health related fitness of the performers in terms of muscular strength, muscular endurance, cardiovascular endurance and flexibility. Also, the dance could improve skill-related fitness such as power, agility, balance and coordination.

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The Eccentric Torque Production Capacity of the Ankle, Knee, and Hip Muscle Groups in Patients with Unilateral Chronic Ankle Instability

Asian Journal of Sports Medicine ◽

10.5812/asjsm.34515 ◽

2013 ◽

Vol 4 (2) ◽

Cited By ~ 15

Author(s):

Hossein Negahban ◽

Aida Moradi-Bousari ◽

Saeed Naghibi ◽

Javad Sarrafzadeh ◽

Mohammad-Jafar Shaterzadeh-Yazdi ◽

...

Keyword(s):

Ankle Instability ◽

Production Capacity ◽

Chronic Ankle Instability ◽

Hip Muscle ◽

Muscle Groups

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A self-oblique exercise that activates the coordinated activity of abdominal and hip muscles–A pilot study

PLoS ONE ◽

10.1371/journal.pone.0255035 ◽

2021 ◽

Vol 16 (8) ◽

pp. e0255035

Author(s):

Yuki Nakai ◽

Masayuki Kawada ◽

Takasuke Miyazaki ◽

Sota Araki ◽

Yasufumi Takeshita ◽

...

Keyword(s):

Upper Limb ◽

Muscle Activity ◽

Gluteus Medius ◽

Voluntary Contraction ◽

Significant Activity ◽

Exercise Load ◽

Hip Muscle ◽

Hip Muscles ◽

Muscle Groups ◽

Adductor Longus

The importance of an interaction between trunk stability muscles and hip muscle function has been suggested. However, reported exercises rarely act on the trunk and hip muscles simultaneously. Here, we devised an abdominal oblique and hip muscle exercise, the Self-oblique exercise (SOE). We examined whether SOE activated abdominal and hip muscles in the supine and half-kneeling positions, compared with abdominal crunch (AC) and plank exercises; and whether participants could modulate the exercise load. Participants were 20 healthy males with some sports experience such as football and baseball on average 10.5 ± 4.0 years. Participants applied self-pressure to their right thighs using the contralateral upper limb with 40% or 70% of the maximum force in Supine SOE and Half- kneeling SOE. The following abdominal and hip muscles were measured using surface electromyography: bilateral external obliques (EO), bilateral internal obliques (IO), right rectus abdominis, right gluteus medius (GMed), and right adductor longus (ADD). All evaluated muscle groups showed significant differences between exercises (p < 0.001). Supine SOE-70% showed 80.4% maximal voluntary contraction (MVC) for left EO (p < 0.017), 61.4% MVC for right IO (p < 0.027), 24.3% MVC for GMed (p < 0.002), and 42.4% MVC for ADD (p < 0.004); these were significantly greatest among all exercises. Muscle activity during Supine SOE-70% was greater than that during Supine SOE-40%. Similarly, Half-kneeling SOE-40% promoted abdominal and hip muscle exertion, and showed more significant activity in GMed (p < 0.006) and ADD (p < 0.001) than AC and plank. SOE could activate abdominal and hip muscles depends on the pressure applied by upper limb. Also, SOE allows participants to modulate the exercise load in a self-controlled step by step manner. Modulation of the exercise load is difficult in AC or plank compared to SOE, and AC or plank cannot obtain simultaneous oblique and hip muscle activity. SOE could be practiced anywhere, in various positions, without any tools.

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Reliability and Validity of the Belt-Stabilized Handheld Dynamometer in Hip- and Knee-Strength Tests

Journal of Athletic Training ◽

10.4085/1062-6050-52.6.04 ◽

2017 ◽

Vol 52 (9) ◽

pp. 809-819 ◽

Cited By ~ 21

Author(s):

Jaqueline Martins ◽

Janaina Rodrigues da Silva ◽

Marcelo Rodrigues Barbosa da Silva; ◽

Débora Bevilaqua-Grossi

Keyword(s):

Correlation Coefficient ◽

Intraclass Correlation Coefficient ◽

Intraclass Correlation ◽

Reliability And Validity ◽

Minimal Detectable Change ◽

Detectable Change ◽

Isokinetic Dynamometer ◽

Hip Muscle ◽

Bland Altman Method ◽

Muscle Groups

Context: The belt-stabilized handheld dynamometer (HHD) has been used to assess the strength of knee- and hip-muscle groups. However, few researchers have examined its reliability and validity for assessing the strength of these muscles. Objective: To evaluate the intra-examiner reliability of the belt-stabilized HHD and its validity and agreement with the isokinetic dynamometer for assessing the strength of knee- and hip-muscle groups. Design: Cross-sectional study. Setting: University laboratory. Patients or Other Participants: We evaluated 26 healthy participants (13 men, 13 women; age = 23.5 ± 2.8 years, height = 1.7 ± 0.1 m, mass = 68.6 ± 12.4 kg) in 2 sessions using the belt-stabilized HHD and an isokinetic dynamometer for maximum strength of the hip adductors, abductors, flexors, extensors, internal rotators, and external rotators and the knee flexors and extensors. Main Outcome Measure(s): We used reliability values provided by the intraclass correlation coefficient (2,3), standard error of measurement (SEM and percentage SEM), and minimal detectable change; correlation values comparing the belt-stabilized HHD and the isokinetic instrument using the Pearson correlation coefficient (r); and the mean difference in values comparing the 2 instruments using the Bland-Altman method. Results: The intrarater HHD reliability was excellent for most measurements (range = 0.80–0.96; SEM = 1.3–5.3 kilograms of force or 4.8−18.9 Nm, percentage SEM = 7.0%–22.0%, minimal detectable change = 3.6–18.8 kilograms of force or 13.2−52.4 Nm) and was moderate only for bilateral knee flexion and left hip internal rotation (intraclass correlation coefficient [2,3] = 0.62–0.66 and 0.70, respectively). Correlation with the isokinetic dynamometer was moderate to high (r = 0.60–0.90), but the absolute values did not demonstrate concordance between results using the Bland-Altman method. Conclusions: The belt-stabilized HHD measurements were reliable, and although they did not agree with those from the isokinetic dynamometer, the values were correlated for the hip- and knee-muscle groups.

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Strength of hip muscle groups in sedentary women with patellofemoral pain syndrome

Journal of Back and Musculoskeletal Rehabilitation ◽

10.3233/bmr-130447 ◽

2014 ◽

Vol 27 (3) ◽

pp. 299-306 ◽

Cited By ~ 2

Author(s):

Zahra Moradi ◽

Mohammad Akbari ◽

Noureddin Nakhostin Ansari ◽

Anita Emrani ◽

Pirayeh Mohammadi

Keyword(s):

Pain Syndrome ◽

Patellofemoral Pain Syndrome ◽

Patellofemoral Pain ◽

Hip Muscle ◽

Muscle Groups ◽

Sedentary Women

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The Effect of an Isometric Hip Muscle Strength Training Protocol on Valgus Angle During a Drop Vertical Jump in Competitive Female Volleyball Players

International Journal of Kinesiology and Sports Science ◽

10.7575/aiac.ijkss.v.5n.4p.1 ◽

2017 ◽

Vol 5 (4) ◽

pp. 1 ◽

Cited By ~ 1

Author(s):

Kaitlin M. Jackson ◽

Tyson A. C. Beach ◽

David M. Andrews

Keyword(s):

Muscle Strength ◽

Injury Risk ◽

Acl Injury ◽

Group Level ◽

Hip Muscle ◽

Peak Knee ◽

Volleyball Players ◽

Acl Injury Risk ◽

Muscle Groups ◽

External Rotator

Background: Hip muscle weakness is associated with higher peak knee valgus angles (VA) during drop vertical jumps (DVJ) and linked to ACL injury risk. Objective: To determine if isometric strengthening (IST) of the hip extensor, abductor, and external rotator muscle groups would reduce VA exhibited during a DVJ. Methodology: Fourteen female volleyball players (7 training (TG), 7 control (CG), VA≥9˚ during DVJ) participated. Pre- and post-test gluteal, quadriceps and hamstring strength were measured with a digital force gauge. Three-dimensional kinematics were collected during 15 DVJ trials. TG participated in a 6-week IST program that targeted the hip extensor, abductor, and external rotator muscle groups. Two-way mixed ANOVAs compared mean differences of VA and strength. Single-participant analyses examined if athlete-specific adaptations went undetected in the analyses of aggregated data. Results: TG hip extension, abduction, and knee flexion strength increased, respectively, by 20.5%, 27.5% and 23.5% (P<0.05). No group-level changes in VA were detected. Unilateral VA decreased for 5 TG participants, and bilateral VA decreased in 2 TG participants. Conclusions: IST increased isometric hip muscle strength, but its effect on VA is inconclusive based on group-level analyses. Using single-participant designs, future studies should assess IST and/or dynamic resistance/neuromuscular training in a larger sample to determine its effect on ACL injury risk factors.

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NORMATIVE ISOMETRIC HIP MUSCLE FORCE VALUES ASSESSED BY A MANUAL DYNAMOMETER

Acta Ortopédica Brasileira ◽

10.1590/1413-785220192702202596 ◽

2019 ◽

Vol 27 (2) ◽

pp. 124-128 ◽

Cited By ~ 1

Author(s):

Glauber Alvarenga ◽

Henry Dan Kiyomoto ◽

Emília Cardoso Martinez ◽

Giancarlo Polesello ◽

Vera Lúcia dos Santos Alves

Keyword(s):

Body Weight ◽

Muscle Force ◽

Isometric Force ◽

Return To Sports ◽

Level Of Evidence ◽

Hip Muscle ◽

Extensor Muscles ◽

Muscle Groups ◽

The Impact ◽

External Rotator

ABSTRACT Objective: Hand-held dynamometry is a quantitative and accessible means of determining the isometric force of muscle groups. Methods: A total of 52 women aged 20–29 years with no complaints of hip pain who were sedentary or sporadically active and had a body mass index of 18.5–24.99 kg/m2 were included. All participants underwent bilateral assessments using hand-held dynamometry of the flexor, extensor, adductor, and abductor muscles as well as the internal and external rotator hip muscles. All hip movements were measured. All contraction data collected by the dynamometer are expressed in kilograms, normalized according to body weight, and expressed as percentages. Results: The flexor muscles exhibited an isometric muscle force of 38.54% of body weight versus a muscle force of 27.04% for the extensor muscles, 16.89% for the adductors, 16.85% for the abductors, and 17.09% for the external rotators, and 23.82% for the internal rotators. Conclusion: Standardization of isometric strength values according to body weight proved feasible. This result is important for clinical practice since it allows the establishment of patterns of normality and criteria for discharge, return to sports, or assessment of the impact of injuries in terms of loss of muscle strength. Level of evidence: III, Development of diagnostic criteria on consecutive patients (with universally applied reference “gold” standard).

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Myoelectric Activity Differences in Three Learning Sessions

Journal of Psychophysiology ◽

10.1027//0269-8803.16.2.92 ◽

2002 ◽

Vol 16 (2) ◽

pp. 92-96

Author(s):

Tiina Ritvanen ◽

Reijo Koskelo ◽

Osmo H„nninen

Keyword(s):

High School Students ◽

Muscle Activity ◽

Muscle Tension ◽

Emg Activity ◽

Traditional Learning ◽

Myoelectric Activity ◽

School Students ◽

Language Laboratory ◽

Upper Trapezius ◽

Muscle Groups

Abstract This study follows muscle activity in three different learning sessions (computer, language laboratory, and normal classroom) while students were studying foreign languages. Myoelectric activity was measured in 21 high school students (10 girls, 11 boys, age range 17-20 years) by surface electromyography (sEMG) from the upper trapezius and frontalis muscles during three 45-min sessions. Root mean square (RMS) average from both investigated muscles was calculated. The EMG activity was highest in both muscle groups in the computer-aided session and lowest in the language laboratory. The girls had higher EMG activity in both investigated muscle groups in all three learning situations. The measured blood pressure was highest at the beginning of the sessions, decreased within 10 min, but increased again toward the end of the sessions. Our results indicate that the use of a computer as a teaching-aid evokes more constant muscle activity than the traditional learning situations. Since muscle tension can have adverse health consequences, more research is needed to determine optimal classroom conditions, especially when technical aids are used in teaching.

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