Amr Abdel-aziem

Cairo University | CU · Department of Biomechanics

Background/purpose The relationship between a handball player's upper body posture, body weight distribution in relation to body height is poorly understood. So, this study explored the relationship between body height and sagittal spinal curvatures and plantar pressure distribution in handball players. Method According to handball player's body h...

Objective: This study aimed to determine the prevalence of smartphones addiction, and to investigate the relationship between smartphones addiction and functional neck disability among the students of Taif University during a Covid-19 pandemic. Methods: A 1060 students from Taif University participated in this study. The smartphones addiction was e...

Objective: The purpose of this study was to investigate the effect of whole-body vibration (WBV) exercises combined with traditional physiotherapy on the hamstrings-to-quadriceps (H:Q) ratio, walking ability, and control of posture in children with hemiparetic cerebral palsy (CP). Methods: A total of 34 children with spastic hemiparetic CP (boys...

Objectives: To investigate the effect of gender on the activation ratio of vastus medialis oblique to vastus lateralis during straight leg raising and stepdown activities. Method: The cross-sectionalstudy was conducted at the College of Medical Rehabilitation Sciences, Taibah University, Medina, Kingdom of Saudi Arabia, from September 2021 to Ma...

Background: Low back pain (LBP) is one of the most common musculoskeletal disorder symptoms affecting adults' health in the workplace including academic settings. Objective: To estimate the prevalence of LBP among academic teaching staff at King Abdulaziz University, as well as to identify its socio-demographic and work-related risk factors. Me...

Background and Objectives: Following an injury, upper-body strength and proprioception training is typically suggested. To our understanding, no prior research has looked into the impact of balance training on upper-body strength and stability. So, this study investigated the effects of Biodex balance training on enhancing the dynamic stability, st...

Severe scarring caused by acne is associated with environmental effects as well as substantial physical and psychological distress, particularly in adolescents. This study aims to evaluate distribution of acne scars in Taif city as an environmental reflection of high altitude as well as its treatment with laser. Patients with moderate to severe acn...

Background/aims The lumbosacral curvature of the spine has a special role in its mobility during weight-bearing activities. Office work is a sedentary role, which requires sitting for long durations, having a negative effect on spinal posture. Therefore, low back pain risk factors in office workers are different from other populations. The aim of t...

Background: Isokinetic strength imbalance is a risk factor for movement dysfunctions and injuries related to shoulder complex. The effects of recreational weightlifting on developing the imbalances between the shoulder muscles are not yet known. Objectives: To investigate the isokinetic concentric shoulder muscle strength values (peak torque nor...

Background: Idiopathic scoliosis is a common spinal malalignment that negatively impacts the respiratory system and physical conditioning in adolescents. Equine-assisted therapy comprises therapeutic horseback riding that optimizes physical performance and mobility in a range of contexts. However, the influence of equine-assisted therapy on pulmon...

Objective: This study investigated the impact of McKenzie exercises against deep neck flexor (DNF) combined with scapulothoracic exercises on improving pain severity, cervical mobility, and functional disability. Patients and methods: Fifty-five subjects suffering from chronic neck pain participated in this randomized controlled study. They were...

Background: Clinical diagnosis of pediatric flexible flatfoot is still a challenging issue for health-care professionals. Clarke’s angle (CA) is frequently used clinically for assessing foot posture; however, there is still debate about its validity and diagnostic accuracy in evaluation of static foot posture especially in the pediatric population,...

Background: Electronic media have become integral parts of modern life, in which prolonged screen viewing time (SVT) by children is nearly unavoidable. Prolonged use of smartphones could lead to musculoskeletal problems. Objectives: To investigate the effect of SVT on head and neck posture during and after using smartphones for various periods o...

Introduction: The most frequent type of spine abnormality throughout adolescence was adolescent idiopathic scoliosis (AIS). Hippotherapy improved posture, balance and gait of different musculoskeletal conditions. Therefore, this study aims to see how hippotherapy combined with Schroth exercises affected postural asymmetry and dynamic balance in AI...

Background Hemiplegic cerebral palsy (CP) enormously affects the quadriceps and hamstring muscles. It causes weakness in the affected lower-extremity muscles in addition to muscle imbalance and inadequate power production, especially in the ankle plantar-flexor and knee extensor muscles. It also causes anomalous delayed myoelectrical action of the...

Objective The purpose of this study was to investigate the effects of stabilization exercises (SEs) combined with pelvic floor muscle (PFM) exercises versus SE alone on pain intensity, functional disability, and static and dynamic endurance of trunk muscles in women with nonspecific low back pain (LBP). Methods A total of 48 women with nonspecific...

Background: One of the important goals in the treatment of spastic cerebral palsy is to maintain efficient and effective walking in order to be independent in activities and participate in society. Objective: To compare the efficacy of foot combination taping of kinesio tape and athletic tape vs ankle foot orthosis in correcting spatiotemporal g...

Objective: To evaluate the perceptions of undergraduate applied medical sciences students in the educational environment. Study Design: A cross-sectional study of all applied medical sciences from December 2018 to January 2019 was carried out. The DREEM questionnaire was distributed to faculty students studying applied medical science. Mean and sta...

Background: The prevalence of anxiety, depression, and stress increased due to COVID 19 crises. Anxiety and depression are the most common psychiatric disorders. The goal of the current study was to compare the effects of aerobic training to cognitive behavioral therapy on university students suffering from mild to moderate anxiety and depression a...

Background: Patients with chronic low back pain (LBP) have an impaired dynamic spinal stability, which may lead to arm injuries. Objectives: To examine the latissimus dorsi and gluteus maximus muscles activation pattern and the upward scapular rotation in patients with chronic LBP. Methods: Sixty-one right-handed males were divided into two gr...

Objective This study evaluated the angular kinematic and moment of the ankle and foot during shod walking and barefoot walking in individuals with unilateral chronic ankle instability (CAI). Methods Twenty eight recreational soccer players with unilateral CAI were recruited for this cross sectional study. A three dimensional motion analysis system...

Background Nonspecific low back pain (LBP) in collegiate athletes is shown to be accompanied by poor core endurance. Consequently, trunk muscle stabilization exercises for lumbar instability are widely used. Virtual reality (VR) training can activate the cerebral cortex and enhance the cortex to control balance and improve motion function. The purp...

Background Forward head and rounded shoulder posture (FHRSP) is a common clinical postural misalignment. It leads to flexion posture of the spine which increases the amount of tension on the nerve roots, which inversely affects muscle strength and function of the upper extremity. So, this study was conducted to examine the effect of FHRSP on hand g...

Objective The purpose of this study was to investigate the effect of whole-body vibration (WBV) on muscle work and bone mineral density (BMD) of the lumbar vertebrae and femur in postmenopausal women. Methods Forty-three postmenopausal women with low BMD were randomly assigned to WBV and control groups. Both groups received calcium and vitamin D s...

Study aim : This study aimed to examine the effect of carrying backpacks on neck posture and ground reaction forces (GRFs) and to investigate the relationship between neck angles and GRFs during backpack carriage in schoolchildren. Material and methods : The craniohorizontal angle (CHA), craniovertebral angle (CVA), sagittal shoulder posture (SSP)...

Objectives: This study aims to examine the effect of backward walking (BW) and forward walking (FW) on the myoelectric activity ratio of the vastus medialis oblique (VMO)/vastus lateralis (VL) in females with patellofemoral pain syndrome (PFPS). Patients and methods: Between September 2016 and December 2016, a total of 40 female participants (me...

Objective: To date little is known about altitude effects on the contractile properties of the skeletal muscles. So, this study was conducted to examine the effect of continuous and intermediate exposure to moderate altitude on the concentric peak torque of ankle dorsiflexors and plantar-flexors, and hand grip strength. Materials and methods: One h...

Background/Aims Little is known regarding the activation of knee and hip muscles during backward walking in patellofemoral pain syndrome. This study examineD the effects of backward walking and forward walking on the activation of knee extensors, hip abductors, and adductors in patients with patellofemoral pain syndrome. Methods A total of 20 fema...

The objective of the current study was to examine the effect of pregnancy during the 2nd and 3rd trimesters on ground reaction forces (GRFs). Twenty-four non-pregnant women and forty-eight pregnant women in the second and third trimesters participated in this cross-sectional study. Qualisys Gait Analysis System was used to analyze peaks and time pa...

Background and objective. Aromatase inhibitor therapy for postmenopausal women with breast cancer is associated with a decrease in bone mineral density (BMD). Both Pulsed electromagnetic fields (PEMFs) and treadmill walking exercises have a positive effect on bone osteoporosis. So, this study aimed to evaluate the effect of PEMFs and treadmill weig...

Background and objective. Aromatase inhibitor therapy for postmenopausal women with breast cancer is associated with a decrease in bone mineral density (BMD). Both Pulsed electromagnetic fields (PEMFs) and treadmill walking exercises have a positive effect on bone osteoporosis. So, this study aimed to evaluate the effect of PEMFs and treadmill weig...

Introduction. There is some recent evidence that temporal specificity is important for optimizing training for muscular performance. This study was to examine the long-term effects of static stretching performed at different times of day on hamstring torque and flexibility. Methods. The total of 60 trained male subjects with tight hamstring were se...

Objective: The aim of this study was to examine the effect of eccentric isotonic training on hamstring flexibility and eccentric and concentric isokinetic peak torque in trained and untrained subjects. Methods: Sixty healthy subjects (mean age: 21.66 ± 2.64) were divided into three equal groups, each with 20 voluntary participants. Two experimen...

Study aim: This study compared the body balance and neck angle differences in children when carrying a traditional backpack versus a double-sided bag. Material and methods: By using the Biodex balance system and a three dimensional motion analysis system, the postural bal­ance and neck angles were assessed in 33 school children while carrying a tra...

Introduction. There is some recent evidence that temporal specificity is important for optimizing training for muscular performance. This study was to examine the long-term effects of static stretching performed at different times of day on hamstring torque and flexibility. Methods. The total of 60 trained male subjects with tight hamstring were se...

[Purpose] To examine the effect of physiotherapy rehabilitation program on moderate knee osteoarthritis in patients with different pain intensities. [Subjects and Methods] Sixty subjects (37 men and 23 women) with moderate knee osteoarthritis participated in the current study. Randomization software was used to select the participating subjects’ nu...

Background and objective: The trunk muscles are vital for the maintenance of spinal stability. Little is known regarding the eccentric strength of back and hip extensor in patients with low back pain due to lumbar spondylosis. So, this study was conducted to examine the effect of lumbar spondylosis on the eccentric and concentric peak torque of lum...

Background and purpose: Electrical stimulation (ES) has been used as one potential rehabilitative treatment option to restore motor function and improve recovery in patients with paresis, especially stroke patients. Multiple stimulation parameters affect the force response of muscle, creating a large number of possible ES parameter protocols. Withi...

Increasing anthropometric measures brings considerable spinal loads during sports practice, which inversely affects the adaptation abilities of the spinal structures; this in turn influences the spinal curvatures. So, this study was conducted to explore the relationship between anthropometric measures and sagittal spinal curvatures in handball play...

Objective: To compare the effects of backward walking training and forward walking training on spatiotemporal gait parameters, and gross motor function measures in children with cerebral palsy. Design: Randomized controlled clinical trial. Setting: Physical therapy clinics. Subjects: A total of 30 children with hemiparetic cerebral palsy of...

Background: Decreased muscle strength and functional capacity are main problems in chronic obstructive pulmonary disease (COPD). Neuromuscular electrical stimulation (NMES) and whole-body vibration (WBV) training are used to overcome this problem. Objective: To compare the effect of NMES and WBV training when added to the traditional pulmonary reha...

Öz • en • tr Objective: This study was conducted to evaluate the physiotherapy students’ satisfaction with learning and teaching process of faculty of applied medical sciences, Taif University, KSA. Methods: A cross-sectional study was conducted. A total of 132 undergraduate physiotherapy students completed a questionnaire consisted of 36 questio...

Purpose: Pregnancy is characterized by many musculoskeletal changes that affect daily living activities and walking. The purpose of this study was to examine the effect of pregnancy on pelvic and trunk kinematics, and their relationship during the three pregnancy trimesters. Methods: Three-dimensional pelvis and trunk motions were measured using...

Background: Repetitive movements and poor posture are associated with over-use of smartphones when texting or playing games and significantly contribute to the symptoms of pain and discomfort in the upper extremities. Objective: This study investigated the effect of exercise training and postural correction on disabilities of the arm, shoulder, and...

Background: Physical activity and sports can be associated with low back pain. However, little is known about the relationship between core stability and nonspecific low back pain (LBP) among athletes. Purpose: The purpose of this study was to investigate the relationship between core endurance and back dysfunction in collegiate male athletes wi...

Objectives: This study aims to investigate the efficacy of deep neck flexor exercises in the management of neck pain. Patients and methods: Sixty patients with non-specific neck pain of at least six-week duration were randomized into one of three groups: group 1 - physical therapy agents including transcutaneous electrical nerve stimulation, contin...

Background: Carrying the school bag may lead to forward leaning of the head and trunk which may result in spinal deformities. Objective: The purpose of this study was to evaluate the effect of carrying a backpack on neck angles and ground reaction forces (GRFs) in children. Methods: 3-D motion analysis system, with a force plate, was used to e...

Purpose: To evaluate the ankle concentric dorsiflexors and plantarflexors’ strength in patients with knee osteoarthritis (OA). Methods: Forty subjects with knee OA were included in the study. The first group consisted of 20 subjects suffering from unilateral tibiofemoral knee OA, with mean age (57.60 ± 4.50 years), mean weight (88.95 ± 11.93 kg), a...

BACKGROUND: Muscle function and functional performance are affected in patients with osteoarthritis (OA). PURPOSE: To assess the relationship between knee OA and ankle proprioception and concentric peak torque of the dorsiflexor and plantar-flexor muscles in older patients. METHODS: Forty participants took part in the study; 20 participants with ch...

Isokinetic training and Russian current stimulation have been advertised to increase muscle strength. So, the purpose of this study was to compare between unilateral isokinetic concentric training and Russian current stimulation on the quadriceps strength of ipsilateral and contralateral limbs. Sixty healthy male subjects were randomly assigned int...

Objective: To study the effect of additional backward walking training on postural control in children with hemiparetic cerebral palsy. Design: Randomized controlled study. Setting: Physical therapy clinics. Subjects: Thirty spastic hemiparetic cerebral palsied children of both sexes (10-14 years, 14 girls and 16 boys). Intervention: Children w...

Purpose: To explore the difference between measuring the Q-angle from standing and supine position in trained subjects suffering from patellofemoral pain. Methods: The patellofemoral pain group (study group) consisted of 30 male participants (age = 26.8 ± 4.5 years, height = 172.9 ± 7.2 cm, mass = 73.3 ± 16.7 kg), the control group consisted of 30...

Abstract Objectives: to study the extent to which the pain severity in moderate knee osteoarthritis could affect the force production of the quadriceps in terms of eccentric and concentric isokinetic torque under different angular velocities. Methods: Sixty male patients diagnosed as moderate bilateral knee osteoarthritis according to Altman grade...

Background and aim: Decreased back extensor muscles endurance is the most common significant finding in patients with discogenic low back pain (DLBP). The aim of this study was to determine whether the holding time at partial range of motion (ROM) is different from full ROM during back extension endurance testing. Methods: Fifty consecutive chronic...

Objective: The purpose of this study was to evaluate the effect of continuous ultrasound [US] compared with placebo US combined with conventional physiotherapy program for patients with cervical spondylosis.Methods: This was a randomized placebo-controlled trial. Patients, diagnosed with cervical spondylosis, were randomly assigned to one of two gr...

The purpose of this study was to explore the effect of unilateral ankle instability on walking energy expenditure. Chronic ankle instability group consisted of 20 subjects their age average (21.4±5.55) years, height average (177.85 ± 4.96) cm and weight average (81.25 ± 6.87) kg, they were referred from orthopedic specialist. The control group cons...

Abstract In this study, we compared the isokinetic torques of hip flexors/extensors and abductors/adductors in soccer players suffering from osteitis pubis (OP), with normal soccer players. Twenty soccer male athletes with OP and 20 normal soccer athletes were included in this study. Peak torque/body weight (PT/BW) was recorded from hip flexor/exte...

The purpose of this study was to evaluate the effect of head angles on ground reaction forces (GRFs) while carrying ordinary backpack. Methods: Thirty children aged between 8-12 years. The static test, to examine the neck angles through three dimensional motion analysis cameras. The dynamic test, to examine the GRF through force platform. Results:...

Background: The peak expiratory flow rate (PEFR) is an important and simple determinant of ventilatory functions. Increased body weight, especially in adolescents, has a negative impact on functional performance. Here an experimental study of the effect of aerobic exercise program on those subjects regarding ventilation and body weight. Objective:...

The purpose of this study was to explore the effect of unilateral ankle instability on walking energy expenditure. Chronic ankle instability group consisted of 20 subjects their age average (21.4±5.55) years, height average (177.85 ± 4.96) cm and weight average (81.25 ± 6.87) kg, they were referred from orthopedic specialist. The control group cons...

Objective: The purpose of this study was to determine if peak torques generated by the hip abductor and adductor muscles are dependent on test position in healthy adults. Methods: Thirty healthy right-handed volunteers participated in this study their average age was 26.5 ± 5.6 years, their average weight was 71.94 ± 11.91 kg, and their average hei...

Osteitis pubis refers to a painful, inflammatory condition involving the pubic bones, pubic symphysis, and adjacent structures. So, the aims of the study were to evaluate the strength of trunk muscles of soccer players suffering from osteitis pubis, and to compare the agonist/antagonist ratio of trunk muscles in osteitis pubis athletes with that of...

To determine if the eccentric evertor/invertor and dorsiflexor/plantar-flexor ratio are altered in subjects with chronic ankle instability. Twenty chronic ankle instability (CAI) subjects as an experimental group, and twenty healthy subjects as a control group, were matched in age, gender, and activity level. CAI subjects have a history of at least...

Purpose of the study: This study was done to determine if there is a relationship between job satisfaction and job performance. Methods: This study was performed on 50 subjects (30 males, and 20 females) from the employee of physical therapy faculty/Cairo University, those who are currently held as employment status. Job satisfaction and job perfor...

The purpose of this study was to examine the effect of chronic ankle instability (CAI) on eccentric peak torque of the ankle musculature. The study included fifty participants divided into two groups; the first group consisted of twenty five subjects suffering from CAI, the second group consisted of twenty five subjects with no prior history of ank...

Background and objective: Stretching exercise protocols, as part of outpatient treatment or home exercise programs, are used to improve muscle flexibility. So, the aim of the study was to examine the body position effect (standing and supine) and dynamic range of motion (DROM) stretching techniqueon hamstring flexibility. Material and Methods: Seve...

Background: Burn leads to catabolic process in the form of severe muscle weakness, loss of mass and function. So, it is important to maintain the muscle strength of patients with burn. Objective: To evaluate the effect of Russian current stimulation on the peak torque of quadriceps muscles of healed burned patients. Materials and Methods: Forty vol...

Background: Trunk and hip joint stability and strength are important for proper gait mechanics and foot position during heel strike. So, it is important to consider the patency of all the leg joints for stability during gait. Objective: To examine the effect of unilateral chronic ankle instability on kinematics and kinetics of trunk and lower extre...

The aim of this study was to examine the long-term effects of static stretching of the plantar-flexor muscles on eccentric and concentric torque and ankle dorsiflexion range of motion in healthy subjects. Seventy five healthy male volunteers, with no previous history of trauma to the calf that required surgery, absence of knee flexion contracture a...

The ankle joint requires very precise neuromuscular control during the process of transition from terminal swing to the early stance phase of the gait cycle. Altered ankle joint arthrokinematics, and muscular activity have been cited, as potential factors that may lead to an inversion sprain during aforementioned time periods. The purpose of the st...

Background: Test-retest strength reliability of the Electronic Push/Pull Dynamometer (EPPD) in the measurement of the extensor and flexor muscles on a new constructed chair. The objective of the study was to assess reliability of Electronic Push/Pull Dynamometer in the measurement of the knee flexion and extension at 90° and 60° on a new constructe...

The ankle joint requires very precise neuromuscular control during the transition from terminal swing to the early stance phase of the gait cycle. Altered ankle joint arthrokinematics and muscular activity have been cited as potential factors that may lead to an inversion sprain during aforementioned time periods. The purpose of the study was to in...

Objective: To evaluate the improvement rate of quadriceps muscle peak torque in healthy subjects and patients with burn injuries after an isokinetic training programme. Subjects: Thirty male volunteers, 15 healthy and 15 subjects with burn injury after complete healing, participated in the study. Methods: Concentric and eccentric torque of quadrice...

Trunk and hip joint stability and strength are important for proper gait mechanics and foot position during heel strike. The ankle joint requires very prices neuromuscular control during the transition from terminal swing to the early stance phase of the gait cycle. So, it is important to consider the patency of all the leg joints for stability dur...

Objectives: To determine the chronic effect of static stretching program of hamstring on knee flexors concentric torque. Methods: Twenty four volunteers male participants (age = 24.08 ± 2.6 years, height 171 ± 5.6 cm, weight = 66.5 ± 5.8 kg). The participants performed a 30 sec static stretch for 6 weeks (three times / week). The knee extension ran...

The purpose of this study was to examine the eccentric torque measures of the ankle musculature in participants with stable ankles and participants with functional ankle instability (FAI) at two angular velocities 30 and 90o/sec. The study included fifty untrained participants(31 male,19 female, age ranged from 19-34 year) divided into two groups;...

The purpose of the study was to assess and compare the oxygen consumption and energy expenditure of normal subjects during walking and running at the same speed. Fifteen volunteers participated in the study. Their body height ranging from 175-185cm with a mean value of 179.5cm (±3.4) and mean weight of 80.47kg (±3.24). Each subject walked on a trea...

The purpose of the study was to identify the relationship between body mass index and energy expenditure of normal subjects with different body weight and height. Fifty two volunteers participated in the study. They were divided into two groups. group (A) consisted of 26 subjects with body height ranging from 165-174 cm with a mean value of 169.5 c...