Sökning: "eccentric"

Visar resultat 21 - 25 av 90 avhandlingar innehållade ordet eccentric.

1. 21. Patellar tendinopathy : on evaluation methods and rehabilitation techniques

   Författare :Anna Frohm; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Biomechanics Bromsman; decline board; eccentric training; patellar tendon load; prospective randomized study; VISA-P score study; VISA-P score study; VISA-P score.;

   Sammanfattning : Background: Patellar tendinopathy is an increasingly common overuse and degenerative injury for recreational and elite athletes. The management of this injury is often difficult and frustrating and the treatment may take a long time. LÄS MER

3. 22. The role of exercise and exercise-related factors in the control of mitochondrial oxidative function

   Författare :Brandon Walsh; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Skinned fibers; permeabilized fibers; skeletal muscle; exercise; mitochondria; ADP sensitivity; aerobic metabolism; training; eccentric; high intensity; creatine; phosphocreatine; inorganic phosphate; hydrogen ions;

   Sammanfattning : The effects of exercise and exercise-related factors on the control of mitochondrial oxidative function were investigated in human and rat skeletal muscle. Oxidative function was assessed through the measurement of oxygen consumption in chemically permeabilized (skinned) fibers. LÄS MER

4. 23. Asymmetric lateral loading of the human trunk

   Författare :Qiang-Min Huang; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Eccentric; concentric; isokinetic; electromyography; co-activation; trunk; spinal biomechanics; contraction patterns; lateral bending; lifting and lowering; balance; kinematics; postural control; IAP; support translation.;

   Sammanfattning : The overall aim of this thesis was to characterize the biomechanics and neuromuscular control of the human trunk in response to asymmetric lateral loading. The pulling force and strength capacities as well as muscle activation patterns, trunk kinematics and postural balance in relation to lateral trunk flexion and loading were given special consideration. LÄS MER

5. 24. Effects of unloading on skeletal muscle mass and function in man

   Författare :Hans Berg; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Atrophy; bedrest; concentric and isometric and eccentric muscle actions; disuse; electromyography; fatigue; fiber types and size; humans; inactivity; maximal voluntary force; recovery; skeletal muscle cross-sectional area; strength; suspension; tomog;

   Sammanfattning : An experimental human model of skeletal muscle unloading of one lower limb and confined bedrest were employed to quantitate the adaptive responses to 10 days, 4 or 6 wk of unloading in healthy humans on quadricep skeletal muscle mass and function. Muscle cross-sectional area (CSA) was assessed using tomographic imaging (CT, MRI). LÄS MER

7. 25. Acute and early chronic responses to resistance exercise using flywheel or weights

   Författare :Lena Norrbrand; Per Tesch; Ola Eiken; Per Aagaard; Mittuniversitetet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; electromyography; flywheel; magnetic resonance imaging; resistance exercise; Sports; Idrott;

   Sammanfattning : Resistance exercise using weights typically offers constant external load during coupled shortening (concentric) and lengthening (eccentric) muscle actions in sets of consecutive repetitions until failure. However, the constant external load and the inherent capability of skeletal muscle to produce greater force in the eccentric compared with the concentric action, would infer that most actions are executed with incomplete motor unit involvement. LÄS MER