Neck flexor muscle strength, efficiency, and relaxation times in normal subjects and subjects with unilateral neck pain and headache

Background: To reduce the rate of anterior cruciate ligament (ACL) graft rupture, recent surgeries have involved anterolateral ligament reconstruction (ALLR). This reconstruction procedure harvests more knee flexor muscle tendons than isolated ACL reconstruction (ACLR), but its influence on knee muscle strength recovery remains unknown. This study aimed to assess the influence of ALLR with a gracilis graft on the strength of the knee extensor and flexor muscles at 6 months postoperatively. Hypothesis: The additional amount of knee flexor harvest for ALLR would result in impairment in knee flexor muscle strength at 6 months postoperatively. Study Design: Retrospective cohort study. Level of Evidence: Level 2. Methods: A total of 186 patients were assigned to 2 groups according to the type of surgery: ACL + ALLR (graft: semitendinosus + gracilis, n = 119) or isolated ACLR (graft: semitendinosus, n = 67). The strength of the knee extensor and flexor muscles was assessed using an isokinetic dynamometer at 90, 180, and 240 deg/s for concentric and 30 deg/s for eccentric contractions and compared between groups using analysis of variance statistical parametric mapping. Results: Regardless of the surgery and the muscle, the injured leg produced significantly less strength than the uninjured leg throughout knee flexion and extension from 30° to 90° for each angular velocity (30, 90, 180, and 240 deg/s). However, the knee muscle strength was similar between the ACL + ALLR and ACLR groups. Conclusion: The addition of ALLR using the gracilis tendon during ACLR does not alter the muscle recovery observed at 6 months postoperatively. Clinical Relevance: Although more knee flexor muscle tendons were harvested in ACL + ALLR, the postoperative strength recovery was similar to that of isolated ACLR.

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EFFICACY OF PRESSURE-BIOFEEDBACK GUIDED DEEP CERVICAL FLEXOR TRAINING ON NECK PAIN AND MUSCLE PERFORMANCE IN VISUAL DISPLAY TERMINAL OPERATORS

Journal of Musculoskeletal Research ◽

10.1142/s0218957713500115 ◽

2013 ◽

Vol 16 (03) ◽

pp. 1350011 ◽

Cited By ~ 4

Author(s):

Md. Nezamuddin ◽

Shahnawaz Anwer ◽

Sohrab Ahmad Khan ◽

Ameed Equebal

Keyword(s):

Neck Pain ◽

Pain Intensity ◽

Exercise Program ◽

Visual Display ◽

Muscle Performance ◽

Control Group ◽

Women Patients ◽

Flexor Muscle ◽

Visual Display Terminal ◽

Pressure Biofeedback

Purpose: This randomized trial study compared the efficacy of pressure-biofeedback guided deep cervical flexor training as an adjunct with conventional exercise on pain and muscle performance in visually displayed terminal operators. Methods: A total of 50 (22 men and 28 women) patients with neck pain participated in the study. Patients were randomly placed into two groups: a biofeedback group (n = 25) and a control group (n = 25). The biofeedback group received pressure-biofeedback guided deep cervical flexor training program for 5 days a week for 6 weeks, whereas the control group received an exercise program only. Results: On intergroup comparisons, the deep cervical flexor performance in biofeedback group, at the end of 6th week was significantly higher than those of control group (p < 0.01). Pain intensity was also significantly reduced in biofeedback group when compared to control group at the end of trial (p < 0.004). Conclusion: The addition of pressure-biofeedback to a 6-week conventional program appeared to increase deep cervical flexor muscle performance, compared to the exercise program alone for people with reduced muscle performance.

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Associations of the Stair Climb Power Test With Muscle Strength and Functional Performance in People With Chronic Obstructive Pulmonary Disease: A Cross-Sectional Study

Physical Therapy ◽

10.2522/ptj.20100091 ◽

2010 ◽

Vol 90 (12) ◽

pp. 1774-1782 ◽

Cited By ~ 25

Author(s):

Marc Roig ◽

Janice J. Eng ◽

Donna L. MacIntyre ◽

Jeremy D. Road ◽

W. Darlene Reid

Keyword(s):

Chronic Obstructive Pulmonary Disease ◽

Muscle Strength ◽

Functional Performance ◽

Knee Extensor ◽

Chronic Obstructive ◽

Flexor Muscle ◽

Cross Sectional ◽

Obstructive Pulmonary Disease ◽

Power Test ◽

Muscle Torque

Background The Stair Climb Power Test (SCPT) is a functional test associated with leg muscle power in older people. Objective The purposes of this study were to compare the results of the SCPT in people with chronic obstructive pulmonary disease (COPD) and people who were healthy and to explore associations of the SCPT with muscle strength (force-generating capacity) and functional performance. Design The study was a cross-sectional investigation. Methods Twenty-one people with COPD and a predicted mean (SD) percentage of forced expiratory volume in 1 second of 47.2 (12.9) and 21 people who were healthy and matched for age, sex, and body mass were tested with the SCPT. Knee extensor and flexor muscle torque was assessed with an isokinetic dynamometer. Functional performance was assessed with the Timed “Up & Go” Test (TUG) and the Six-Minute Walk Test (6MWT). Results People with COPD showed lower values on the SCPT (28%) and all torque measures (∼32%), except for eccentric knee flexor muscle torque. In people with COPD, performance on the TUG and 6MWT was lower by 23% and 28%, respectively. In people with COPD, the SCPT was moderately associated with knee extensor muscle isometric and eccentric torque (r≥.46) and strongly associated (r=.68) with the 6MWT. In people who were healthy, the association of the SCPT with knee extensor muscle torque tended to be stronger (r≥.66); however, no significant relationship between the SCPT and measures of functional performance was found. Limitations The observational design of the study and the use of a relatively small convenience sample limit the generalizability of the findings. Conclusions The SCPT is a simple and safe test associated with measures of functional performance in people with COPD. People with COPD show deficits on the SCPT. However, the SCPT is only moderately associated with muscle torque and thus cannot be used as a simple surrogate for muscle strength in people with COPD.

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The effect of posture on ventilatory muscle function and lung function

South African Journal of Physiotherapy ◽

10.4102/sajp.v42i3.806 ◽

1986 ◽

Vol 42 (3) ◽

pp. 81-84 ◽

Cited By ~ 1

Author(s):

P. Gounden

Keyword(s):

Muscle Strength ◽

Lung Function ◽

Muscle Function ◽

Normal Subjects ◽

Normal Group ◽

Optimum Position ◽

Asthmatic Group

The purpose of this study was to determine the influence of posture on ventilatory muscle strength and on lung function.Maximum static inspiratory pressures (MIPS), maximum static expiratory pressures (MEPS) and lung function measurements (FVC, FEV1, PEFR) were obtained in three different body positions in 57 normal subjects and in 16 asthmatic patients.Statistical analysis of the data obtained showed that changes in position influence the ventilatory muscle function and lung function values.The sitting lean forward and the sitting erect positions were the better positions in the normal group. The findings revealed that the sitting lean forward position was the optimum position for the asthmatic group (p 0,001).

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Non-linear growth trends of toe flexor muscle strength among children, adolescents, and young adults: a cross-sectional study

European Journal of Applied Physiology ◽

10.1007/s00421-018-3827-x ◽

2018 ◽

Vol 118 (5) ◽

pp. 1003-1010 ◽

Cited By ~ 3

Author(s):

Noriteru Morita ◽

Junichiro Yamauchi ◽

Ryosuke Fukuoka ◽

Toshiyuki Kurihara ◽

Mitsuo Otsuka ◽

...

Keyword(s):

Young Adults ◽

Muscle Strength ◽

Linear Growth ◽

Cross Sectional Study ◽

Adolescents And Young Adults ◽

Sectional Study ◽

Flexor Muscle ◽

Cross Sectional ◽

Growth Trends ◽

Non Linear

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Effect of Temporomandibular Joint Mobilization on Neck Pain and Function in Patients with Chronic Non-Specific Neck Pain

Reabilitacijos mokslai slauga kineziterapija ergoterapija ◽

10.33607/rmske.v2i19.759 ◽

2019 ◽

Vol 2 (19) ◽

Author(s):

Edgaras Lapinskas ◽

Janina Stirbytė

Keyword(s):

Neck Pain ◽

Temporomandibular Joint ◽

Chronic Neck Pain ◽

Flexor Muscle ◽

Joint Mobilization ◽

Movement Characteristics ◽

Neck Function ◽

Before And After ◽

And Function

Background. Neck pain is a common problem, and it includes 30% of 25–29 year olds. The percentage of people over 45 years of age has risen to 50% (Knight and Draper, 2012). Long-term muscle imbalance disrupts body biomechanics. Due to long-lasting pain, the quality of work may decrease, rest can get worse, and mood may change. Purpose. To determine the eﬀect of temporomandibular joint mobilization for neck pain and function in patients who suﬀer chronic non-specifc neck pain. Methods. The study involved six people with non-specifc chronic neck pain, who were divided into two groups: exercises, and the second group – exercises and mobilization of temporomandibular joint. At the beginning and end of the study, we performed the following tests: deep neck ﬂexor endurance test, visual analogue scale (VAS), goniometry, the amplitude of the temporomandibular joint. Results. In the group of exercises, the pain score after treatment decreased (before – 67 ± 28, after – 14 ± 16.5) the strength and endurance of the deep neck ﬂexor muscle improved (before – 13.7 ± 2.5 s, after – 28.7 ± 6.4 s). The amplitude of all neck movements was improved (p < 0.05), comparing them before and after physiotherapy. The amplitude of the temporomandibular joint improved the movement characteristics: depression, lateral excursions to left and right, protrusion (p < 0.05). Conclusions. Comparing the results after applying diﬀerent methods of physiotherapy, intensity of pain and neck function parameters did not show significant diﬀerences.Keywords: temporomandibular joint, nonspecifc neck pain, mobilization.

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Neck flexor muscle strength and its relation with functional performance in Duchenne muscular dystrophy

European Journal of Paediatric Neurology ◽

10.1016/j.ejpn.2016.12.008 ◽

2017 ◽

Vol 21 (3) ◽

pp. 494-499

Author(s):

Sibel Bozgeyik ◽

İpek Alemdaroğlu ◽

Numan Bulut ◽

Öznur Yılmaz ◽

Ayşe Karaduman

Keyword(s):

Duchenne Muscular Dystrophy ◽

Muscular Dystrophy ◽

Muscle Strength ◽

Functional Performance ◽

Flexor Muscle

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Hamstring Flexibility Is Not Correlated with Isokinetic Knee Muscle Strength in Female Modern Dancers

Medical Problems of Performing Artists ◽

10.21091/mppa.2018.2016 ◽

2018 ◽

Vol 33 (2) ◽

pp. 95-101 ◽

Cited By ~ 1

Author(s):

Ani Agopyan

Keyword(s):

Muscle Strength ◽

Knee Extensor ◽

Peak Torque ◽

Flexor Muscle ◽

Work Production ◽

University Level ◽

Modern Dancers ◽

Hamstring Flexibility ◽

Knee Muscle ◽

The Right

OBJECTIVE: To evaluate bilateral isokinetic knee extensor and flexor muscle strength relative to hamstring flexibility in female modern dancers. METHODS: 20 trained university-level female modern dance students (mean age 23.8±3.8 yrs) volunteered for the study. Concentric isokinetic peak torque (PT, in Nm), peak torque % of body weight (PT%BW, in Nm/kg), and total work (TW, in J) of the knee extensor and flexor muscles for each leg were measured with a dynamometer at a velocity of 60, 180, and 300°/s. Hamstring flexibility of both limbs was assessed by a goniometer with the subjects in a supine position using the active straight leg raise (SLR) test. Participants were divided into flexible (n=10) and highly flexible (n=10) groups based on their hamstring flexibility. RESULTS: The flexible and highly flexible groups had significant differences (p≤0.05) for the right (flexible, 119.7±4.3°; highly flexible, 137.7±2.6°) and left active SLR tests (flexible, 120.6±5.3°; highly flexible, 138.3±4.5°). No significant differences were found between the flexible and highly flexible dancers for concentric knee extensor and flexor muscle strength in all selected parameters (p≤0.05). There were also no significant correlations between flexibility and bilateral PT, PT%BW, and TW scores (60, 180, and 300°/s) of dancers at the concentric contraction (p≤0.05). CONCLUSION: These findings indicate that hamstring flexibility (for both the flexible and highly flexible groups) is not correlated with knee strength and has no impact on torque and work production during maximal concentric isokinetic knee muscle action in university-level female modern dancers.

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