Sökning: "knee extensors"

Visar resultat 1 - 5 av 13 avhandlingar innehållade orden knee extensors.

1. 1. Biomechanical analyses of flywheel resistance exercise : From a space- and ground-based perspective

   Författare :Maria Sjöberg; Ola Eiken; Elena Gutierrez-Farewik; Hans E Berg; Patrik Sundblad; Loren FZ Chiu; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; AnyBody Modeling System; concentric; eccentric; eccentric overload; inverse dynamics; knee extensors; microgravity; musculoskeletal deconditioning; net-joint moment; AnyBody Modeling System; excentrisk; excentrisk överbelastning; invers dynamik; knäextensorer; koncentrisk; ledmoment; mikrogravitation; muskuloskeletal nedbrytning; Teknik och hälsa; Technology and Health;

   Sammanfattning : Astronauts suffer degradation of postural muscles and weight-bearing bones during long-duration spaceflight. Resistance exercise is used as a primary countermeasure against these degradations. LÄS MER

3. 2. Effects of unloading and resistance exercise on skeletal muscle function, size and composition in man

   Författare :Björn Alkner; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Atrophy; bed rest; confinement; countermeasure; electromyography; human; knee extensors; magnetic resonance imaging; microgravity; muscle function; myosin heavy chains; plantar flexors; resistance exercise; skeletal muscle; spaceflight; strength; training specificity; unloading;

   Sammanfattning : Exposure to microgravity, i.e., spaceflight, causes muscle unloading leading to muscle atrophy and dysfunction. Thus, there is a need for effective countermeasures to combat these effects. LÄS MER

4. 3. Elite sprinters, ice hockey players, orienteers and marathon runners : isokinetic leg muscle performance in relation to muscle structure and training

   Författare :Christer Johansson; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Electromyography; endurance; enzyme histocytochemistry; fatigue; ice hockey; isokinetic; muscle contraction; OBLA; orienteering; running;

   Sammanfattning : In male athletes from different sports, isokinetic knee extensor, and in orienteers also plantar flexor peak torque (PT), contractional work (CW) and integrated surface electromyograms (iEMG) were analysed.Single contraction PT, CW and iEMG in sprinters and marathon runners were signi­ficantly correlated to the cross-sectional area (CSA) of m. LÄS MER

5. 4. The injured anterior cruciate ligament and neuromuscular rehabilitation

   Författare :Rose Zätterström; Människan i rörelse: hälsa och rehabilitering; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Surgery; long-term follow-up; short-term; non-surgical treatment; ACL injury; associated lesions; orthopaedics; traumatology; Kirurgi; ortopedi; traumatologi;

   Sammanfattning : Two prospective, short-term and long-term consecutive randomized studies on non-surgical treated patients with an ACL injury were performed. None of the patients were athletes on a professional level. LÄS MER

7. 5. Gait strategy in myelomeningocele : movements, mechanics and methods

   Författare :Elena M Gutierrez; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Myelomeningocele; spina bifida; gait analysis; movement analysis; muscle paresis; compensatory movements; orthoses; centre of mass.;

   Sammanfattning : The overall aim of this thesis was to describe the movement patterns employed in self-ambulatory children with a range of muscle paresis due to nervous tissue damage resulting from myelomeningocele, a common congenital malformation of the spinal column resulting in sensory and motor paresis. Using 3D movement analysis, the upper and lower body kinematics, movement of the center of mass, and joint moments, powers, and work done during gait in 32 children with lumbo-sacral myelomeningocele were analyzed and divided into 5 groups based on the severity of paresis. LÄS MER