On the influence of muscular exercise, sweating, amd massage, on the metabolism / by J.C. Dunlop ... [and others].

Date:
[1897]
Catalogue details

Licence: Public Domain Mark

Credit: On the influence of muscular exercise, sweating, amd massage, on the metabolism / by J.C. Dunlop ... [and others]. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    abstraction of proteid from other tissues may result from excessive muscular work. In undertaking this investigation, it appeared desirable to render the observations as complete as possible, and hence, not only were the various nitrogenous excretions in the urine dealt with, but the excre- tions of the principal inorganic constituents were also investigated. The analyses were divided between the four observers. Mr Maccadam estimated the potassium and sodium in the urine, Dr Stockman estimated the uric acid and creatinin in the urine, Dr Paton the chlorides and phosphates of the urine, Dr Paton and Mr Maccadam the sulphates, and Dr Dunlop the total nitrogen, urea, extractive nitrogen and preformed ammonia of the urine and the nitrogen of the faeces and food stuffs. The general management of the observations was undertaken by Dr Dunlop. There are two factors which must necessarily complicate obser- vations on the effects of muscular exercise, the one sweating, the other the mechanical influence of contracting muscle on the flow of blood and lymph. These two factors we have investigated by separate experiments, adopting the dry heat of a Turkish bath to produce sweating, and general massage to imitate the mechanical influence on the blood and lymph flow. We shall here give, firstly, a detailed statement of the experiments undertaken; secondly, a consideration of the effects produced on each of the excretions examined; and, lastly, conclusions to be derived from the results. Reference to previous work will principally be found in the second part. I. Report of Experiments. Five experiments were made, of these three were to investigate the effect of excessive muscular exercise, one that of sweating and one that of massage. In all of them the general arrangement was similar. The subject was put on a rigidly fixed diet for a period of seven days. It was found impracticable to continue the conditions for a longer period. The muscular work was done on the fourth day. This crave a sufficiently long fore-period to show changes on the experiment day, and a sufficiently long after-period to show later changes.