The influence of aerobic exercise training on the double product break point in low-to-moderate risk adults

• Published in: European journal of applied physiology 2011-02, Vol.111 (2), p.313-318
• Main Authors: Hargens, Trent A., Griffin, Diane C., Kaminsky, Leonard A., Whaley, Mitchell H.
• Format: Article
• Language: English
• Subjects: Adult; Aerobics; Anaerobic threshold; Anaerobic Threshold - physiology; Biological and medical sciences; Biomedical and Life Sciences; Biomedicine; Blood pressure; Blood Pressure - physiology; Body composition; Body mass index; Cardiovascular disease; Cardiovascular Diseases - etiology; Cardiovascular Diseases - physiopathology; Electrocardiography; Exercise - physiology; Exercise intensity; Exercise Test; Female; Fitness training programs; Fundamental and applied biological sciences. Psychology; Heart rate; Heart Rate - physiology; Human Physiology; Humans; Ischemia; Male; Occupational Medicine/Industrial Medicine; Original Article; Physical Education and Training; Physical fitness; Risk Factors; Sedentary Lifestyle; Sports Medicine; Vertebrates: body movement. Posture. Locomotion. Flight. Swimming. Physical exercise. Rest. Sports; Young Adult
• ISSN: 1439-6319; 1439-6327
• DOI: 10.1007/s00421-010-1661-x

The double product is the product of the heart rate and systolic blood pressure. The double product break point (DPBP) is a physiologic threshold that occurs at similar exercise intensities to that of the ventilatory threshold (VT). The influence of aerobic exercise training on the DPBP has not yet been examined. The purpose of this study was to examine whether aerobic exercise training (ET) increases the exercise intensity at which the DPBP occurs, and whether it increases in a similar fashion to the VT. Seven males and 11 females, all sedentary (mean ± SD: age = 29.9 ± 10.5 years) underwent supervised cardiopulmonary exercise testing using a cycle ergometer ramp protocol at baseline and after 8 weeks of vigorous ET on a cycle ergometer. The VT was determined by gas analysis and the V-slope method. Experienced observers using standardized instructions visually determined the DPBP. Following ET, V O 2peak , maximal workload, and body composition variables all showed significant positive changes. The V O 2 at which the DPBP and VT occurred increased significantly from baseline to follow-up ( P