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Official Journal of the Italian Sports Medicine Federation
Indexed/Abstracted in: BIOSIS Previews, EMBASE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 0,163
Online ISSN 1827-1863
Coelho Pereira B. 1, Da Trindade C. Pereira A. K. F. 2, Coutinho De Oliveira C. V. 3, Silva A. S. 4
1 Biomedical Engineering, Universidade do Vale do Paraíba – UNIVAP, São José dos Campos, São Paulo, Brazil;
2 Department of Morphology, Universidade Federal da Paraíba, João Pessoa, Brazil;
3 Department of Nutritional Sciences, Universidade Federal da Paraíba, João Pessoa, Brazil;
4 Department of Physical Education, Universidade Federal da Paraíba, João Pessoa, Brazil
AIM: The aim of this paper was to evaluate the influence of the cervical spine positioning in plasma oxygen saturation and capacity for resistance exercise in young and previously trained adults.
METHODS: Fifteen subjects (20.9±2.3years) of both genders who are used to perform resistance exercises, participated in the study. In a randomized and cross-over design, they perform lateral flexion of the shoulder (flying machine), until concentric failure. Pulse oximetry was checked before, during and after each series. Blood samples were collected for verification of lactate in the range of one to three minutes after the end of each series.
RESULTS: The saturation measurements performed immediately post exercise showed no differences between the control and the experimental procedures, as well as the lactatemia. However, the exercise performed in the experimental procedure resulted in lower drop in O2 saturation during exercise than in control procedure (96.6±1.2 to 94.1±1.5% and 97.0±0.8% to 90.3±5.8% respectively, P<0.05). Despite the lower fall in O2 saturation during the exercise in the experimental procedure, this phenomenon was not accompanied by better exercise tolerance. This can be explained by some aspects, as: other factors (as vascularization and partial pressure of oxygen in the tissues) also are implicated in artery-venous difference, which has influence in O2 availability to the muscles; the metabolic character of exercise employed could be a limiting step on O2 delivery.
CONCLUSION: The rectification of the cervical part of the column in order to improve oxygenation while performing resistance exercises until concentric failure is able to minimize the drop in oxygen saturation during a series of resistance exercise, but is not able to improve tolerance for this exercise.
language: English, Italian