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J Ehrig

Publications and source records attributed to J Ehrig.

11 recordsLinked to original sources
PubMed2002

Oxygen uptake in whole-body vibration exercise: influence of vibration frequency, amplitude, and external load.

Vibration exercise (VbX) is a new type of physical training to increase muscle power. The present study was designed to assess the influence of whole-body VbX on metabolic power. Specific oxygen uptake (sVO(2)) was assessed, testing the hypotheses that sVO(2) increases with the frequency of vibration (tested in 10 males) and with the amplitude (tested in 8 males), and that the VbX-related increase in sVO(2) is enhanced by increased muscle force (tested in 8 males). With a vibration amplitude of 5 mm, a linear increase in sVO(2) was found from frequencies 18 to 34 Hz (p < 0.01). Each vibration cycle evoked an oxygen consumption of approximately 2.5 micro l x kg(-1). At a vibration frequency of 26 Hz, sVO(2) increased more than proportionally with amplitudes from 2.5 to 7.5 mm. With an additional load of 40 % of the lean body mass attached to the waist, sVO(2) likewise increased significantly. A further increase was observed when the load was applied to the shoulders. The present findings indicate that metabolic power in whole-body VbX can be parametrically controlled by frequency and amplitude, and by application of additional loads. These results further substantiate the view that VbX enhances muscular metabolic power, and thus muscle activity.

Adult↗
PubMed2000

Bone-muscle strength indices for the human lower leg.

This cross-sectional study is based on images from the lower leg as assessed by peripheral quantitative computer tomography (pQCT). Measurements were performed in 39 female and 38 male control subjects and 15 female professional volleyball players, all between 18 and 30 years of age. The images were obtained at shank levels of 4%, 14%, 33%, and 66% from the distal end. Bone and muscle cross-sectional areas, and the bones' density-weighted area moment of resistance and of inertia were assessed. From these, muscle-bone strength indices (MBSIs) were developed for compression (CI = 100. bone area/muscle area) and bending (BI = 100. bone area moment of resistance/muscle area/tibia length). Significant correlations between muscle cross-sectional area and bone were found at all section levels investigated. The strongest correlation for compression was observed in the sections at 14% (correlation coefficient r = 0.74), where 4.10 +/- 0.46 cm(2) bone, on average, was related to 100 cm(2) muscle. The compression index (CI) at the 14% level was independent of the tibia length. Interestingly, the 15 athletes had significantly greater CIs than the control subjects. This is most probably due to the greater tension development in the athletes. The highest correlation for bending was for anteroposterior bending at 33% of tibia length (r = 0.81), where the area moment of resistance, R, was on, average, 4.21 +/- 0.54 cm(3)/100 cm(2) muscle/m tibia length. Analysis of the bones' area moment of inertia showed that buckling is a possible cause of bending at the 33% and 66% levels, but not at the 14% level. No gender differences in MBSI were found. Likewise, age was without significant effect. The data show that bone architecture depends critically on muscle cross section and tension development. Moreover, bone geometry (e.g., the tibia length) influences the geometrical distribution of bone mineral, as it was found that long bones adapted to the same compressive strength are wider than short ones. We conclude that MBSIs offer a powerful diagnostic tool for bone disorders and may contribute to improving the treatment of bone metabolic and other diseases.

Absorptiometry, Photon↗
PubMed1976

[Contribution to the clinical picture of Wegener's granulomatosis].

On the basis of 5 casuistics of Wegener's granulomatosis the author deals with the difficulties of the diagnosis and differential diagnosis, whereby above all is referred to the preculiarities of the cases and the malinterpretation of the diagnoses on admission to the hospital.

Adult↗
PubMed1976

[Evaluation of Brdicka's reaction in tumor diagnostic (author's transl)].

We have investigated the polarographic behaviour of sera from patients of an ORL-department by means of Brdicka reaction. It could be shown, that patients with cancer or acute inflammation had significantly increased values. But the arithmetic mean of this groups is enclosed by the scattering of the normal collective, therefore is no practically use for diagnostic purposes possible.

Carcinoma, Squamous Cell↗
PubMed1975

[Clinical-biochemical study of systemic panchondritis].

With the help of a casuistic and the results of own investigations clinical, differential-diagnostic, biochemical, pathogenetic and therapeutic aspects of panchondritis systemica are described. The very rare clinical picture, which coincides with chondrolysis and perichondritis, manifests itself intermittently in the region of the auricles, the nose, the cartilaginous parts of the ribs as well as of the chondroskeleton of the respiratory system and in most cases has a fatal termination. Probably on the basis of the pathogenetically decisive changes of the basic substance in addition to this arthritic symptoms, symptoms similar to Bechterew's disease, carditic as well as ocular and internal ear symptoms may appear. Results of own investigations refer to considerable abnormalities in the glucosamine glycan metabolism, in which case the question must remain open, whether these biochemical and immunologic factors are to be regarded as the primary pathogenetic cause. For avoiding irreparable and dangerous defects of the cartilage a sufficiency dosed treatment with corticoids is necessary.

Adult↗