The effect of mekenzies exercises on Cardiovascular responses in khatam al_Anbia hospital personals in Zahedan

Repetitive exercises of the type recommended by McKenzie for the lumbar spine such as flexion and extension exercises in standing (FIS and EIS) and lying positions (FIL and EIL) have been used in the management of low back pain for 20 years. The Cardiovascular responses of exercises that performed in a lying position are well known. Therefore the purpose of this study was to examine the Cardiovascular effects of 4 exercises used in the Mckenzie system. For this control trial (before and after) study 72 subjects without cardiovascular or cardiopulmonary disease and who were representative of people susceptible to low back pain were studied. 36 men and 36 women divided three groups (low fat normal high fat) after determined BMI. Everyone performed 4 exercises in 4 days. Subjects performed sets of 10 15 and 20 repetitions of the assigned exercise with a 20 minute rest between sets. Heart Rate Blood Pressure and rate-pressure product (an index of myocardial work) were recorded before and after each set of repetitions. After 10 repetitions flexion and extension in lying were more hemodynamically demanding than in standing. This trend persisted for 15 and 20 repetitions however at 20 repetitions the hemodynamic demands were different across exercise groups (ie FIL > EIL > FIS > EIS). Hemodynamically demanding were more in men due to women and also in high fat and due to normal and low fat (ie:high fat>normal>low fat) Discussion and Repetitive exercises of the type suggested by McKenzie for the lumbar spine can have hemodynamic effects in people with no cardiovascular or cardiopulmonary conditions. These effects may be important with respect to cardiac work and patients for whom these exercises are indicated should have a cardiac and pulmonary risk factor assessment to determine whether heart rate and blood pressure should be monitored.