Ingunn Stemlandab, Jørgen Ingebrigtsena, Caroline S. Christiansena, Bente R. Jensenb, Christiana Hanischc, Skottea & Andreas Holtermanna*a National Research Centre for the Working Environment, Copenhagen, Denmarkb Integrated Physiology, Department of Nutrition, Exercise and Sports, University Denmarkc Work Health, Federal Institute Occupational Safety Health (BAuA), Berlin, Germany

Abstract We investigated the effects of subacromial impingement syndrome (SIS) on shoulder sensory‐motor control and maximal muscle strength. It was hypothesized that both would be impaired due to chronic pain associated with syndrome. Nine subjects unilateral SIS who remained physically active in spite nine healthy matched controls were examined determine isometric isokinetic submaximal shoulder‐abduction force steadiness at target forces corresponding 20%, 27.5%, 35% abductor torque,...

To study musculoskeletal workload in experienced surgeons during laparoscopic surgery (LS) compared with robotic assisted laparoscopy (RALS).70-90% of who regularly perform LS report symptoms, mainly neck and shoulders. Data regarding the potential ergonomic benefits RALS a clinical setting is very limited.Twelve advanced experience both each performed 2 hysterectomies on same day. was standing, sitting, latter allowing forearm head support. Bipolar surface electromyogram (EMG) recorded from...

<i>Background:</i> Age-related effects on physiological stress reactions regarding changes in salivary cortisol concentration, saliva flow rate, and masticatory muscle activity, as well the corresponding perceived mental performance response to acute stressors, have not yet been fully described. <i>Objective:</i> Thus, aim of this study was assess age-related variations these variables minor naturalistic stressors terms computer tasks. <i>Methods:</i> 13...

This study investigated maximal oxygen consumption (VO2max) and time to exhaustion while running on a lower-body positive pressure treadmill (LBPPT) at normal body weight (BW) as well how BW support affects respiratory responses, ground reaction forces, stride characteristics.Twelve runners performed VO2max tests regular an LBPPT. Furthermore, they steady-state (10km/hr, 14 km/hr, 18 km/hr) high-speed (20km/hr 22 four different BWs the VO2, heart rate, ventilation, breathing frequency...

The echogenicity patterns of ultrasound scans contain information tissue composition in muscles. aim was: (1) to develop a quantitative image analysis characterize terms intensity and structure the images, (2) use method for characterization images supraspinatus muscle, vastus lateralis muscle.Computerized texture analyses employing first-order higher-order grey-scale statistics were developed objectively m. from 9 healthy participants.The mean was higher muscle (p < 0.05) than (average...

Inappropriate floors in pig pens and slippery floor conditions may cause leg problems that reduce animal welfare. Therefore the objectives of present study were to characterise walk pigs on dry concrete solid floor, evaluate whether modify their gait according condition, suggest a coefficient friction (COF) ensures safe walking for pigs. Kinematic (50 Hz video recordings sagittal plane) kinetic (1 KHz force plate measuring three perpendicular ground reaction forces) data collected from four...

We investigated muscle activation strategy and performance of knee extensor flexor muscles in children adults with generalized joint hypermobility (GJH) compared them controls.Muscle activation, torque steadiness, electromechanical delay, strength were evaluated 39 36 during isometric extension flexion. Subjects performed maximum contractions, submaximal contractions at 25% voluntary contraction (MVC), explosive contractions.Agonist was reduced, coactivation ratio greater GJH flexion...

We investigated lower-extremity isometric tremor Approximate Entropy (irregularity), torque steadiness and rate of force development (RFD) their associations to muscle activation strategy during knee extensions in patients with Parkinson’s disease (PD). Thirteen male idiopathic PD 15 neurologically healthy matched controls performed maximal contractions (extension/flexion) as well steady submaximal powerful extensions. The showed decreased irregularity. Torque was reduced the had increased...

Running on a lower-body positive-pressure (LBPP) treadmill allows effects of weight support leg muscle activation to be assessed systematically, and has the potential facilitate rehabilitation prevent overloading. The aim was study effect running with estimate relative knee ankle joint forces. Runners performed 6-min sessions at 2.22 m/s 3.33 m/s, 100%, 80%, 60%, 40%, 20% body (BW). Surface electromyography, ground reaction force, characteristics were measured. Relative forces estimated. Leg...

Study Design. Brief (30-second) isometric trunk extensions at 5%, 20%, 40%, 60%, and 80% of maximal voluntary contraction (MVC) 3 minutes prolonged extension (20% MVC) in erect position were studied nine healthy male subjects. Objectives. To investigate the intercorrelation between intramuscular pressure tissue oxygenation paravertebral muscles during submaximal contractions further, to evaluate electromyogram as indicators force development. Summary Background Data. Local physiologic...

Intramuscular pressure (IMP) and electromyography (EMG) mirror muscle force in the nonfatigued during static contractions. The present study explores whether constant IMP-EMG relationship with increased may be extended to dynamic contractions fatigued muscle. IMP EMG were recorded from shoulder muscles three sessions: 1). brief arm abductions at angles 0 90 degrees, without 1 kg hands; 2). angular velocities 9 degrees /s, 3). prolonged abduction 30 for min followed by recovery. parallel...

In mice, certain proteins show a highly confined expression in specific muscle groups. Also, resting and exercise/contraction-induced phosphorylation responses are higher rat skeletal with low mitochondrial content compared to muscles high content, possibly related differential reactive oxygen species (ROS)-scavenging ability or glycogen content. To evaluate these parameters humans, biopsies from soleus, gastrocnemius vastus lateralis were taken before after 45 min inclined (15%) walking...

To study differences in gait patterns 10-year-old children with Generalized Joint Hypermobility (GJH) and no GJH (NGJH). A total of 37 participated (19 GJH, 18 NGJH, mean age 10.2 (SD 0.5) years). Inclusion criteria for were a Beighton score ≥5, at least one hypermobile knee joint; NGJH ≤4, knees both groups pain during the previous week. All recorded by five video cameras, while they walked across three force platforms. Net joint moments calculated 3D inverse dynamics peak values provided...