Showing papers on "Interval training published in 1990"

Cardiovascular responses to exercise in Nigerian women.

Abstract: Forty-two sedentary Nigerian women participated in the exercise programme aimed at investigating the value of two different training methods in influencing resting systolic and diastolic blood pressures and heart rate. The subjects were randomly divided into three groups. Group I (15 subjects) exercised under Interval Training Protocol (ITP). Group 2 (15 subjects) exercised under Continuous Training Protocol (CTP). The last group (12 subjects) was the control. The training period lasted 12 weeks. Data analysis using analysis of covariance (ANCOVA) revealed significant differences between the pre- and post-training resting systolic and diastolic blood pressure as well as the heart rate measurements. The level of significance for the three cardiovascular variables was 0.001. The interval training group demonstrated superior cardiovascular responses over that of the continuous training group.

Anaerobic threshold alterations caused by interval training in 11-year-olds.

Abstract: The purpose of this study was to examine the effects of the interval training on metabolic parameters at maximal work and at the anaerobic threshold in 11 year olds. The subjects were five healthy male children. They trained outdoor for 50 min a day, five times a week for six weeks, using interval work at 25 and 50% above their anaerobic threshold. Before and after training program, they performed a progressive exercise test on a cycle ergometer. During the last 15 sec of each power output measurements were made of oxygen uptake (VO2), carbon dioxide output (VCO2), heart rate (HR), ventilation (VE), ventilatory equivalent for oxygen (VEO2) and ventilatory equivalent for carbon dioxide VECO2). Following training, the group increased their anaerobic threshold (expressed as %VO2max) significantly (P less than 0.05) during the progressive exercise test, by 22%. Also at the anaerobic threshold level, increases were observed following training in CO2 output (VCO2-AT) and respiratory exchange ratio (R). Oxygen uptake (VO2, l.min-1) was increased by 19%, but the difference was not significant (P greater than 0.05). Maximal ventilatory equivalent for (VECO2max) decreased significantly (P less than 0.05). Maximal heart rate was reduced significantly (P less than 0.05). We conclude that training led to an increase of both anaerobic and aerobic metabolism, at any submaximal work above the anaerobic threshold, for this specific age group.

Acute cardiovascular and metabolic changes in interval and endurance training in selected patients following aortocoronary bypass operation

Abstract: UNLABELLED This study compared the acute changes of cardiovascular and metabolic reactions during interval and continuous training after coronary bypass surgery. Two groups of 9 male patients (age: 59 +/- 4 and 56 +/- 6 years, resp.) each trained on bicycle ergometer start on post-operative days 24 and 26, resp. In both training groups training heart rate was set at 86% of individual maximum heart rate. In the last week of training the exercise intensity in the group of patients who were trained by the continuous method was at 83 watts, and at 20:121 watts in the group of patients who were trained by interval method (rest:work each 1:1 min). At this exercise training that lasted for 20 min the acute response of heart rate, blood pressure, rate-pressure product, glucose, lactate and catecholamines was measured. RESULTS In both methods there were no significant differences in systolic and diastolic pressure, rate-pressure product, in glucose or catecholamine levels. However, there was a significantly higher rate of lactate in the second 10 min of the interval training. And, in spite of higher peripheral exercise intensity by interval training, there was no higher cardiac work than by the continuous training. These findings suggest that interval training strains the oxidative capacity of the trained muscles in a more intensive and direct way than does continuous training.

Training Methods for High Performance Disabled Athletes

Abstract: Different types of exercise/physical activity training can be incorporated into many facets of activity programming available to a spinal cord injured (SCI) person. These include: 1. The inpatient’s rehabilitation process 2. The recreational aspect of daily living activities 3. The specialized training for the “elite” wheelchair athlete