scholarly journals Muscle Atrophy and Functional Deficits of Knee Extensors and Flexors in People With Chronic Stroke

2012 ◽  
Vol 92 (3) ◽  
pp. 429-439 ◽  
Author(s):  
Christiane L. Prado-Medeiros ◽  
Milla P. Silva ◽  
Giovanna C. Lessi ◽  
Marcela Z. Alves ◽  
Alberto Tannus ◽  
...  
Keyword(s):  
Motor Function ◽  
Muscle Atrophy ◽  
Peak Torque ◽  
Quadriceps Muscle ◽  
Chronic Stroke ◽  
Muscle Volume ◽  
Knee Extensors ◽  
Control Group ◽  
Hamstring Muscle ◽  
Paretic Limb

BackgroundFurther clarification is needed with regard to the degree of atrophy in individual muscle groups and its possible relationship to joint torque deficit poststroke.ObjectiveThe purpose of this study was to investigate quadriceps and hamstring muscle volume and strength deficits of the knee extensors and flexors in people with chronic hemiparesis compared with a control group.DesignThis was a cross-sectional study.MethodsThirteen individuals with hemiparesis due to chronic stroke (hemiparetic group) and 13 individuals who were healthy (control group) participated in this study. Motor function, quadriceps and hamstring muscle volume, and maximal concentric and eccentric contractions of the knee extensors and flexors were assessed.ResultsOnly the quadriceps muscle of the paretic limb showed reduced muscle volume (24%) compared with the contralateral (nonparetic) limb. There were no differences in muscle volume between the hemiparetic and control groups. The peak torque of the paretic-limb knee extensors and flexors was reduced in both contraction modes and velocities compared with the nonparetic limb (36%–67%) and with the control group (49%–75%). The nonparetic limb also showed decreased extensor and flexor peak torque compared with the control group (17%–23%). Power showed similar deficits in strength (12%–78%). There were significant correlations between motor function and strength deficits (.54–.67).LimitationsMagnetic resonance imaging coil length did not allow measurement of the proximal region of the thigh.ConclusionsThere were different responses between quadriceps and hamstring muscle volumes in the paretic limb that had quadriceps muscle atrophy only. However, both paretic and nonparetic limbs showed knee extensor and flexor torque and power reduction.

scholarly journals Kinesio Taping Does Not Alter Quadriceps Isokinetic Strength and Power in Healthy Nonathletic Men: A Prospective Crossover Study

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Paweł Korman ◽  
Anna Straburzyńska-Lupa ◽  
Radosław Rutkowski ◽  
Jakub Gruszczyński ◽  
Jacek Lewandowski ◽  
...  
Keyword(s):  
Repeated Measures ◽  
Peak Torque ◽  
Quadriceps Muscle ◽  
Knee Extensors ◽  
Isokinetic Strength ◽  
Acute Effects ◽  
Isokinetic Dynamometer ◽  
Mean Power ◽  
Concentric Contractions ◽  
Kinesio Taping

Objectives. The effects of Kinesio Taping (KT) on muscular performance remain largely unclear. This study aimed to investigate the acute effects of KT on the maximum concentric and eccentric quadriceps isokinetic strength.Study Design. This is a single-blinded, placebo crossover, repeated measures study.Methods. Maximum isokinetic concentric/eccentric extension torque, work, and power were assessed by an isokinetic dynamometer without taping (NT) and with KT or placebo taping (PT) in 17 healthy young men. Repeated measures one-way analysis of variance (ANOVA) was used for statistical analyses.Results. Testing concentric contractions at 60°/s or 180°/s isokinetic speed, no significant differences in peak torque (Nm), total work (J), or mean power (W) were noted among the application modes under different conditions. Testing eccentric contractions at 30°/s or 60°/s isokinetic speed, no significant differences in mentioned parameters were noted, respectively. KT on the quadriceps neither decreased nor increased muscle strength in the participants.Conclusion. KT application onto the skin overlying the quadriceps muscle does not enhance the strength or power of knee extensors in healthy men.

Can Hip Joint Position affect Quadriceps Muscle Responses during Knee Extension Exercise?

2020 ◽  
Vol 41 (13) ◽  
pp. 929-935
Author(s):  
Denis César Leite Vieira ◽  
Marco Aurélio Araujo Dourado ◽  
Lucas Ugliara ◽  
Joao Luiz Quagliotti Durigan ◽  
Brad J. Schoenfeld ◽  
...  
Keyword(s):  
Vastus Lateralis ◽  
Muscle Thickness ◽  
Rectus Femoris ◽  
Peak Torque ◽  
Quadriceps Muscle ◽  
Knee Extension ◽  
Knee Extensors ◽  
Work Output ◽  
Before And After ◽  
Knee Extension Exercise

AbstractThis study investigated the acute effects of seated and supine knee extension exercise on muscle swelling, torque, and work output. Twelve resistance-trained men performed two isokinetic concentric-only knee-extension training protocols at different hip positions in a counter-balanced order. They completed the knee extension exercise in the seated (hip angle at 85°) and supine (hip angle at 180°) positions. The torque and work output were assessed during each set. Moreover, muscle thickness of the middle and proximal vastus lateralis and rectus femoris were evaluated before and after each protocol and used as an indicator of muscle swelling. Middle rectus femoris and proximal vastus lateralis thickness increased significantly (p=0.01) with no difference between exercise variations. However, the middle vastus lateralis thickness increased (p=0.01) only after the seated knee extension exercise (~7%). Knee extensors’ peak torque and work output were approximately 8% higher (p=0.04) in the seated when compared to the supine hip position. There was a similar decrease in torque and work output throughout both protocols (p=0.98). In conclusion, seated knee extension exercises produced greater torque, work output, and muscle swelling in the vastus lateralis when compared to the supine knee extension exercise.

scholarly journals Muscle strengthening of knee extensors in hemiparetics: prospective and longitudinal study

2020 ◽  
pp. 1-6
Author(s):  
Wildja de Lima Gomes ◽  
Thais Botossi Scalha ◽  
Ana Carolina Nunes Bovi ◽  
Wagner de Mello e Castro ◽  
Amanda Pennacchi ◽  
...  
Keyword(s):  
Motor Function ◽  
Negative Impact ◽  
Muscle Tension ◽  
Berg Balance Scale ◽  
The Body ◽  
Motor Dysfunction ◽  
Knee Extensors ◽  
Control Group ◽  
Limiting Factor ◽  
Muscle Strengthening

Background: Several attempts to reduce spasticity have been directed to stroke sufferers based on the historical view that spasticity is the major determinant of motor dysfunction and that its reduction results in improved function of the affected limb. Paresis is also recognized as a limiting factor in hemiparetic rehabilitation and has a negative impact on self-care, mobility, or up and down stairs due to slow activation of motor units and difficulty in producing adequate amount of muscle strength. In the treatment of spasticity, many therapeutic procedures have been used. Resisted exercises occur when there is load on the body segment distal to the muscle that develops muscle tension, occurs muscle shortening and an external force is overcome. Objective: The aim of this study was to analyze the results of isometric and isotonic strengthen program in the quadriceps muscles of the affected limb of patients with chronic hemiparesis secondary to stroke and to evaluate its effects on spasticity, motor function of the lower limb, balance and mobility. Methods: The participants were divided into three groups: isotonic strengthening, isometric strengthening and control group. It was applied the Ashworth scale, Fugl-Meyer Protocol, Time Up and Go test and Berg Balance Scale. Results: The isometric and isotonic strengthening program presented post-treatment variations, whereby only the isometry group showed improvement in balance. The control group did not show a significant improvement. There was no increase in the muscular tonus of the quadriceps or hamstrings immediately after the treatment. Conclusion: The selective muscle strengthening of the quadriceps resulted in an increase of the motor function, balance and mobility followed by a decrease or maintenance of the muscular tonus of the patients.

scholarly journals A prospective study of the muscle strength and reaction time of the quadriceps, hamstring, and gastrocnemius muscles in patients with plantar fasciitis

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Jin Hyuck Lee ◽  
Hae Woon Jung ◽  
Woo Young Jang
Keyword(s):  
Reaction Time ◽  
Muscle Strength ◽  
Plantar Fasciitis ◽  
Peak Torque ◽  
Quadriceps Muscle ◽  
Control Group ◽  
Foot Pressure ◽  
Delayed Reaction ◽  
Hamstring Muscles ◽  
Normal Controls

Abstract Background Muscle weakness is an important etiological factor in plantar fasciitis (PF), but available data on the role of the quadriceps, hamstring, and gastrocnemius (GCM) muscles are limited. The aim of this study was to compare the strength and reaction time of the quadriceps, hamstring, and GCM muscles and foot pressure between patients with PF and normal controls. Methods A total of 21 PF patients and 21 normal controls were enrolled. Muscle strength was measured by the peak torque per body weight (Nmkg− 1 × 100). Muscle reaction time was evaluated by the acceleration time (AT, milliseconds). Foot pressure and posture were assessed by pedobarography [valgus/varus index (VV index), %]. Results The strength of the quadriceps was significantly lower in the affected ankles of the PF group than in the control group (p = 0.005). The AT of the quadriceps and hamstring muscles was significantly increased in the affected ankles of the PF group than in the control group (quadriceps: p = 0.012, hamstring: p = 0.001), while the AT of the GCM muscle was significantly decreased (p = 0.009) and significantly correlated negatively with quadriceps muscle strength (r = −.598, p = 0.004) and AT (r = −.472, p = 0.031). Forefoot (p = 0.001) and hindfoot (p = 0.000) pressure were significantly greater, with the VV index showing hindfoot valgus, in the affected ankles in the PF group compared to the control group (p = 0.039). Conclusions This study demonstrated weakness and delayed reaction time of the quadriceps and hamstring muscles, with a rapid reaction time of the GCM muscle, in patients with PF. Clinical relevance Clinicians and therapists should assess the function of the quadriceps and hamstring muscles when planning the management of PF patients without muscle tightness.

Improvement of Hand Motor Function after Radial Shock Wave Therapy in Chronic Stroke Patients

2018 ◽  
pp. 2-12
Author(s):  
M Kamaluddin ◽  
Erna Setiawati ◽  
Tanti Ajoe Kesoema
Keyword(s):  
Shock Wave ◽  
Motor Function ◽  
Controlled Trial ◽  
Hand Function ◽  
Chronic Stroke ◽  
Control Group ◽  
Shock Wave Therapy ◽  
Stroke Patients ◽  
And Control ◽  
Experimental Group

Introduction: The Radial Shock Wave Therapy (RSWT) expected could improve spasticity and hand function in chronic stroke patients. This study aimed to find out the improvement of hand function after RSWT as an additional therapy in chronic stroke patients. Methods: Design study was a randomized controlled trial. The patients were assigned randomly to the experimental group (Infrared, Stretching, and RSWT) and control group (Infrared and Stretching) for six weeks. Hand motor function was measured using Fugl-Meyer Motor Assesment (FMA) before and after intervention. Conclusion: There were improvement of wrist and hand FMA scores in the experimental as well as control group Results: Median of wrist FMA scores in the experimental and control group before intervention were 2 and 3 respectively whereas median of wrist FMA scores in the experimental and control group after intervention were 5 and 4 respectively. Median of hand FMA scores in the experimental and control group before intervention were 4 and 4 respectively whereas median of hand FMA scores in the control and experimental group after intervention were 6 and 5 respectively. The scores of wrist- hand FMA in the control and experimental group after intervention were increased P = 0.001P < 0.001 (wrist) and P = 0.001 P < 0.001 (hand) respectively. However, difference increased of wrist and hand FMA scores in the experimental group after intervention were more significant. Keywords: Spasticity, Hand Function, Stroke, Radial Shock Therapy, Fugl-Meyer Motor Assesment

Improvement of Hand Motor Function after Radial Shock Wave Therapy in Chronic Stroke Patients

2019 ◽  
pp. 2-12
Author(s):  
M. Kamaluddin K ◽  
Erna Setiawati ◽  
Tanti Ajoe Kesoema
Keyword(s):  
Shock Wave ◽  
Motor Function ◽  
Hand Function ◽  
Chronic Stroke ◽  
Control Group ◽  
Shock Wave Therapy ◽  
Stroke Patients ◽  
Before And After ◽  
And Control ◽  
Experimental Group

IIntroduction: The Radial Shock Wave Therapy (RSWT) expected could improve spasticity and hand function in chronic stroke patients. This study aimed to find out the improvement of hand function after RSWT as an additional therapy in chronic stroke patients. Methods: Design study was a randomized controlled trial, in December 2018. The patients were assigned randomly to the experimental group (Infrared, Stretching, and RSWT) and control group (Infrared and Stretching) for six weeks. Hand motor function was measured using Fugl-Meyer Motor Assesment (FMA) before and after intervention. Results: The median values of wrist FMA scores in the experimental and control group before and after intervention were 2 vs 5 (p=0.001) and 3 vs 4 (p<0.001) respectively. The median values of hand FMA scores in the experimental and control group before and intervention were 4 vs 6 (p=0,.001) and 4 vs 5 (p<0.001). However, the delta between before and after intervention was higher in experimental group. Conclusion: The improvement of wrist and hand FMA scores after added treatment by RSWT was tend to higher.Keywords: Spasticity, Hand Function, Stroke, Radial Shock Therapy, Fugl-Meyer Motor Assesment

Relationship between muscle volume and contractile properties of the human knee extensors

2016 ◽  
Vol 41 (1) ◽  
pp. 110-113 ◽  
Author(s):  
Martin Behrens ◽  
Niklas Brown ◽  
Robert Bollinger ◽  
Dieter Bubeck ◽  
Anett Mau-Moeller ◽  
...  
Keyword(s):  
Knee Flexion ◽  
Femoral Nerve ◽  
Quadriceps Muscle ◽  
Muscle Volume ◽  
Contractile Properties ◽  
Knee Extensors ◽  
Resonance Imaging ◽  
Human Knee ◽  
The Relationship ◽  
Stimulation Of

The present study was designed to investigate the relationship between volume and electrically evoked twitch properties of the quadriceps muscle. Supramaximal single and doublet stimulation of the femoral nerve was used to assess contractile properties at 45° and 80° knee flexion. Muscle volume was measured using a 1.5-Tesla magnetic resonance imaging scanner. Quadriceps muscle volume was only significantly correlated (r = 0.629) with peak twitch torque induced by doublet stimulation at 80° but not at 45° knee flexion.

scholarly journals A prospective study of the muscle strength and reaction time of the quadriceps, hamstring, and gastrocnemius muscles in patients with plantar fasciitis

2020 ◽  
Author(s):  
Jin Hyuck Lee ◽  
Woo Young Jang
Keyword(s):  
Reaction Time ◽  
Muscle Strength ◽  
Plantar Fasciitis ◽  
Peak Torque ◽  
Quadriceps Muscle ◽  
Control Group ◽  
Foot Pressure ◽  
Delayed Reaction ◽  
Hamstring Muscles ◽  
Normal Controls

Abstract Background: Muscle weakness has been reported to be an important etiological factor in plantar fasciitis (PF), but the data available in the quadriceps, hamstring, gastrocnemius (GCM) muscles is limited . The aim of the study was to compare the strength and reaction time of the quadriceps, hamstring, and gastrocnemius (GCM) muscles and foot pressure between patients with PF and normal controls. Methods: 21 PF patients and 21 normal controls were registered. Muscle strength was measured by the peak torque per body weight (Nm kg−1 × 100). Muscle reaction time was evaluated by the acceleration time (AT, milliseconds). Foot pressure and posture were assessed by pedobarography [valgus/varus index (VV index), %].Results: The strength of the quadriceps was significantly decreased in the affected ankles of the PF group than in the control group (p=0.005). The AT of the quadriceps and hamstring muscles was significantly increased in the affected ankles of the PF group than in the control group (quadriceps: p=0.012, hamstring: p=0.001), while the AT of the GCM muscle was significantly decreased (p=0.009) and was significantly negatively correlated with quadriceps muscle strength (r=-.598, p = .004) and AT (r=-.472, p=.031). Forefoot (p=0.001) and hindfoot (p=0.000) pressure were significantly greater, with the VV index showing hindfoot valgus, in the affected ankles of the PF group when compared to those of the control group (p=0.039).Conclusion: This study demonstrated weakness and delayed reaction time of the quadriceps and hamstring muscles, with a rapid reaction time of the GCM muscle, in PF patients. Clinical Relevance: Clinicians and therapists should assess the function of the quadriceps and hamstring muscles when planning the management of PF patients without muscle tightness.

Effect of strength training combined with antioxidant supplementation on muscular performance

2018 ◽  
Vol 43 (8) ◽  
pp. 775-781 ◽  
Author(s):  
Maurilio T. Dutra ◽  
Sávio Alex ◽  
Marcio Rabelo Mota ◽  
Nathalia B. Sales ◽  
Lee E. Brown ◽  
...  
Keyword(s):  
Strength Training ◽  
Randomized Study ◽  
Muscle Thickness ◽  
Peak Torque ◽  
Quadriceps Muscle ◽  
Muscle Performance ◽  
Control Group ◽  
Total Work ◽  
Antioxidant Supplementation ◽  
Significant Group

This was a placebo-controlled randomized study that aimed to investigate the effects of strength training (ST) combined with antioxidant supplementation on muscle performance and thickness. Forty-two women (age, 23.8 ± 2.7 years; body mass, 58.7 ± 11.0 kg; height, 1.63 ± 0.1 m) were allocated into 3 groups: vitamins (n = 15), placebo (n = 12), or control (n = 15). The vitamins and placebo groups underwent an ST program, twice a week, for 10 weeks. The vitamins group was supplemented with vitamins C (1 g/day) and E (400 IU/day) during the ST period. Before and after training, peak torque (PT) and total work (TW) were measured on an isokinetic dynamometer, and quadriceps muscle thickness (MT) was assessed by ultrasound. Mixed-factor ANOVA was used to analyze data and showed a significant group × time interaction for PT and TW. Both the vitamins (37.2 ± 5.4 to 40.3 ± 5.6 mm) and placebo (39.7 ± 5.2 to 42.5 ± 5.6 mm) groups increased MT after the intervention (P < 0.05) with no difference between them. The vitamins (146.0 ± 29.1 to 170.1 ± 30.3 N·m) and placebo (158.9 ± 22.4 to 182.7 ± 23.2 N·m) groups increased PT after training (P < 0.05) and PT was higher in the placebo compared with the control group (P = 0.01). The vitamins (2068.3 ± 401.2 to 2295.5 ± 426.8 J) and placebo (2165.1 ± 369.5 to 2480.8 ± 241.3 J) groups increased TW after training (P < 0.05) and TW was higher in the placebo compared with the control group (P = 0.01). Thus, chronic antioxidant supplementation may attenuate peak torque and total work improvement in young women after 10 weeks of ST.

scholarly journals Improvement of Hand Motor Function after Radial Shock Wave Therapy in Chronic Stroke Patients

2018 ◽  
Vol 7 (01) ◽  
pp. 2
Author(s):  
M. Kamaluddin K ◽  
Erna Setiawati ◽  
Tanti Ajoe Kesoema
Keyword(s):  
Shock Wave ◽  
Motor Function ◽  
Hand Function ◽  
Chronic Stroke ◽  
Control Group ◽  
Shock Wave Therapy ◽  
Stroke Patients ◽  
Before And After ◽  
And Control ◽  
Experimental Group

IIntroduction: The Radial Shock Wave Therapy (RSWT) expected could improve spasticity and hand function in chronic stroke patients. This study aimed to find out the improvement of hand function after RSWT as an additional therapy in chronic stroke patients. Methods: Design study was a randomized controlled trial, in December 2018. The patients were assigned randomly to the experimental group (Infrared, Stretching, and RSWT) and control group (Infrared and Stretching) for six weeks. Hand motor function was measured using Fugl-Meyer Motor Assesment (FMA) before and after intervention. Results: The median values of wrist FMA scores in the experimental and control group before and after intervention were 2 vs 5 (p=0.001) and 3 vs 4 (p<0.001) respectively. The median values of hand FMA scores in the experimental and control group before and intervention were 4 vs 6 (p=0,.001) and 4 vs 5 (p<0.001). However, the delta between before and after intervention was higher in experimental group. Conclusion: The improvement of wrist and hand FMA scores after added treatment by RSWT was tend to higher.Keywords: Spasticity, Hand Function, Stroke, Radial Shock Therapy, Fugl-Meyer Motor Assesment

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