Refine
Year of publication
Document Type
- Article (44)
- Conference Proceeding (9)
- Doctoral Thesis (1)
- Talk (1)
Language
- English (55) (remove)
Keywords
- Iterative learning control (2)
- Stiffness (2)
- locomotion (2)
- muscle fascicle behavior (2)
- ultrasound (2)
- ultrasound imaging (2)
- Achilles tendon (1)
- Adaptive control (1)
- Ageing (1)
- AlterG (1)
- Anatomy (1)
- Annulus Fibrosus (1)
- Architectural gear ratio (1)
- Assistive technology (1)
- Automatic control (1)
- Bone quality and biomechanics (1)
- Disc Degeneration (1)
- Environmental impact (1)
- External knee adduction moments (1)
- Force (1)
- Handbike (1)
- Human-Computer interaction (1)
- Intervertebral Disc (1)
- Intradiscal Pressure (1)
- Inverse dynamic problem (1)
- Inverse kinematic problem (1)
- Knee (1)
- Load modeling (1)
- Manipulated variables (1)
- Muscle (1)
- Muscle Fascicle (1)
- Muscle Force (1)
- Musculoskeletal model (1)
- Musculoskeletal system (1)
- Nucleus Pulposus (1)
- Paralympic sport (1)
- Physiology (1)
- Rehabilitation Technology and Prosthetics (1)
- Rehabilitation engineering (1)
- Robotic rehabilitation (1)
- Running (1)
- Simulation (1)
- Skeletal muscle (1)
- Surgical Navigation and Robotics (1)
- Tendon Rupture (1)
- Tendon properties (1)
- Tendons (1)
- Training (1)
- Ultrasound (1)
- achilles tendon (1)
- agility (1)
- biomechanics (1)
- community dwelling (1)
- connective tissue (1)
- drop jump (1)
- electromyography (1)
- energy absorption (1)
- energy dissipation (1)
- force generation (1)
- gait (1)
- healthy aging (1)
- high-intensity exercise (1)
- hyper-gravity (1)
- hypo-gravity (1)
- intraclass correlation coefficient (1)
- mechanical buffer (1)
- muscle mechanics (1)
- overload (1)
- parabolic flight (1)
- performance testing (1)
- physiology (1)
- prevention (1)
- psychosocial (1)
- rehabilitation (1)
- running (1)
- sEMG (1)
- sarcomere operating length (1)
- series elastic element behavior (1)
- shoulder (1)
- sprint start (1)
- standard error of measurement (1)
- stiffness (1)
- stretch reflex (1)
- stretch-shortening cycle (1)
- tendon rupture (1)
- test-retest reliability (1)
- ultrasonography (1)
- unloading (1)
- walking (1)
- walking gait (1)
BACKGROUND: Muscle stretch reflexes are widely considered to beneficially influence joint stability and power generation in the lower limbs. While in the upper limbs and especially in the muscles surrounding the shoulder joint such evidence is lacking. OBJECTIVE: To quantify the electromyographical response in the muscles crossing the shoulder of specifically trained overhead athletes to an anterior perturbation force. METHODS: Twenty healthy male participants performed six sets of different external shoulder rotation stretches on an isokinetic dynamometer over a range of amplitudes and muscle pre-activation moment levels. All stretches were applied with a dynamometer acceleration of 10,000∘/s2 and a velocity of 150∘/s. Electromyographical response was measured via sEMG. RESULTS: Consistent reflexes were not observed in all experimental conditions. The reflex latencies revealed a significant muscle main effect (F (2,228) = 99.31, p< 0.001; η2= 0.466; f= 0.934) and a pre-activation main effect (F (1,228) = 142.21, p< 0.001; η2= 0.384; f= 1.418). The stretch reflex amplitude yielded a significant pre-activation main effect (F (1,222) = 470.373, p< 0.001; η2= 0.679; f= 1.454). CONCLUSION: Short latency muscle reflexes showed a tendency to an anterior to posterior muscle recruitment whereby the main internal rotator muscles of the shoulder revealed the most consistent results.