EMGs were collected from 14 muscles with surface electrodes in 10 subjects walking 1.25-2.25 ms(-1) and running 1.25-4.5 ms(-1). The EMGs were rectified, interpolated in 100% of the stride, and averaged over all subjects to give an average profile. In running, these profiles could be decomposed into 10 basic patterns, 8 of which represented only a single burst. Muscles could be divided into a q...

The respiratory muscles may fatigue during prolonged exercises and thereby become a factor that limits extreme physical activity. The aim of the current study was to determine whether respiratory muscle fatigue imposes a limitation on extreme physical activity of well-trained young men. Electromyography (EMG) signals of respiratory (external intercostal and sternomastoid) and calf muscles (gast...

Denervation of muscle usually leads to muscle atrophy with fatty replacement but, uncommonly, also results in muscle hypertrophy or pseudohypertrophy with fatty replacement. We report the ultrasonographic and magnetic resonance imaging (MRI) findings of a patient with diffuse fatty infiltration of calf muscles as a result of denervation pseudohypertrophy. The elevated fasting glucose, neurogeni...

The vastly increasing number of neuro-muscular simulation studies (with increasing numbers of muscles used per simulation) is in sharp contrast to a narrow database of necessary muscle parameters. Simulation results depend heavily on rough parameter estimates often obtained by scaling of one muscle parameter set. However, in vivo muscles differ in their individual properties and architecture. H...

BACKGROUND The aim of this study was to determine (31)PMRS reference spectrum and intracellular pH of calf muscles in the dominant limb of healthy, young, male volunteers before and after intense physical effort. MATERIAL/METHODS Examinations were performed with a 1.5 T MR system. FID CSI (Free Induction Decay Chemical Shift Imaging) sequence was used with the following parameters: TR=4000 ms...

Introduction: Plantar fasciitis occurs with the deterioration of plantar fascia and related surrounding tissues around heel's medial calcaneal tuberosity. This illness usually causes tightness in calf muscles. These tight muscles are thought to interfere normal biomechanics ambulation. The invention percussion massage guns intends improve usefulness efficiency self-myofascial release, following...

may be no blood-flow through the calf muscle of a claudicant during certain forms of exercise, in particular when the patient rhythmically raises himself up and down on tiptoe of one leg. It may also be true of an athlete that there is no bloodflow through his calf muscles when performing short and rapid sprints like running 100 yards in 10 seconds. My interest in this subject started when I fo...

We describe an unusual presentation of a localized form of polyarteritis nodosa (PAN) manifested by acute onset of severe calf pain. Biopsies of the gastrocnemius muscle and fascia revealed an acute necrotizing arteritis with fasciitis. The lumens of affected vessels were occluded by thrombi. PAN localized to calf muscles is extremely rare. To our knowledge this is the first report of evidence ...

OBJECTIVE: To determine the effects of massage treatment plus 24hours of elastic calf compression on delayed onset of muscle soreness following maximum calf-raise exercises during three consecutive days. METHODS: Fourteen female students (aged 20–22 yr) who had regularly performed moderate exercise were submitted to maximum calf-raise exercises of 1 movement per 3 seconds till exhaustion. Seven...

Nineteen patients with obliterative arteriosclerotic disease of the legs and suffering from intermittent claudication were studied before and during a 6 months' training program. The maximal walking distance and the calf muscle blood flow during walking (xenon-133 clearance technique) was recorded at monthly intervals. A significant correlation was established between improvement in maximal wal...