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P Yazbek

Publications and source records attributed to P Yazbek.

5 recordsLinked to original sources
PubMed1994

[Cardiopulmonary exercise test in the evaluation of healthy elderly men].

PURPOSE: To study methodological aspects and results of cardiopulmonary exercise tests in elderly. METHODS: Twenty-five men (mean age 65 +/- 5 years) performed a cardiopulmonary exercise test using a bicycle ergometer and a progressive continuous work load increase protocol was employed. A computadorized system (2001 CAD/Net System-MGC), which includes a gas analyser and a pneumotacograph, was used for on line monitoring of oxygen and carbon dioxide expired fraction and also of pulmonary flow. RESULTS: We observed the following values of oxygen uptake, pulmonary ventilation and respiratory gas exchange: rest=4 +/- 1 ml/kg-1/min-1, 11 +/- 2 l/min-1 and 0.80 +/- 0,1, respectively: anaerobic threshold=12 +/- 3 ml/kg-1/min-1, 29 +/- 6 l/min-1 and 0.90 +/- 0.1, respectively: respiratory compensation point=18 +/- 4ml/kg-1/min-1, 47 +/- 1 l/min-1 and 1.07 +/- 0.1, respectively, and peak of exercise = 13 +/- 5 ml/kg-1/min-1, 76 +/- 18 l/min-1 and 1.21 +/- 0.2, respectively. The anaerobic threshold and the respiratory compensation point were achieved at 53 +/- 11 and 77 +/- 9% of peak oxygen uptake respectively. The elderly shown slightly increased values of the relation volume dead/tidal volume at rest with a slightly smaller decrease of its values during exercise in comparison to data obtained from young healthy untrained subjects. The heart rate prescription for exercise based on the heart rate reserve was higher than that based on the cardiorespiratory and metabolic responses (113-126bpm vs 96-114bpm). CONCLUSION: The cardiorespiratory and metabolic responses pattern in the elderly is quite heterogeneous. The heart rate prescription for exercise based on conventional stress tests seems to overestimate cardiorespiratory and metabolic capacity in healthy elderly men. The determination of anaerobic threshold and respiratory compensation point from cardiopulmonary exercise test data optimize exercise prescription for healthy elderly men.

Aged↗
PubMedDate not supplied

Assessment of functional capacity during gait using a reciprocal propulsion orthosis (ARGO)--a comparative study with a conventional mechanical orthosis.

One subject (male, 24 years) with an incomplete motor and sensitive SCI, neurological level C6-C7 was submitted to a comparative study during gait using an advanced reciprocating gait othosis (ARGO) and a conventional mechanical orthosis (CMO) and respiratory and metabolic variables were compared at peak effort and in the second minute of recovery. We found that the ARGO, as with the CMO, not guarantee gait independence but the ARGO does enable a more functional gait pattern with a more efficient ventilation. The ratio of CO2/O2 showed that ARGO enable aerobic conditions of work and the energy expenditure using is significantly lower than CMO.

Adult↗
PubMedDate not supplied

[Osteomyoarticular injuries in a physical conditioning program].

From the follow-up of one hundred and thirty patients in a physical conditioning program during the period of one year, partially disabling lesions with preliminary complaints were observed at the beginning of the program in thirteen patients, and lesions during the development of the program were observed in nineteen patients. Within the first group, four patients had to quit the program, two temporarily and two definitively. In the second group, five patients had to interrupt the program for periods varying from twenty days to two months. In both groups, treatment involving physical agents, kinesiotherapy and drugs was proposed. Interruptions in the physical conditioning program for periods longer than three weeks imply in considerable reduction of the cardiovascular benefits. The clinician must be aware of the fact that sedentary patients have not only cardiovascular, but also musculoskeletal deconditioning. These patients must be evaluated by the physiatrist in order that the disabling lesions be avoided and treated.

Adult↗