Effect of sprint interval training on circulatory function during exercise in sedentary, overweight/obese women

• Published in: European journal of applied physiology Vol. 111; no. 8; pp. 1591 - 1597
• Main Authors: Trilk, Jennifer L., Singhal, Arpit, Bigelman, Kevin A., Cureton, Kirk J.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01.08.2011; Springer; Springer Nature B.V
• Subjects: Acceleration; Adult; Athletic Performance - physiology; Biological and medical sciences; Biomedical and Life Sciences; Biomedicine; Blood Circulation - physiology; Body mass index; Cardiovascular disease; Cardiovascular Physiological Phenomena; Diabetes; Exercise; Exercise - physiology; Female; Fundamental and applied biological sciences. Psychology; Health care; Heart rate; Human Physiology; Humans; Hypertension; Interval training; Mortality; Obesity; Obesity - physiopathology; Occupational Medicine/Industrial Medicine; Original Article; Overweight; Overweight - physiopathology; Physical Education and Training - methods; Physical fitness; Physical Fitness - physiology; Running - physiology; Sedentary Lifestyle; Sports Medicine; Time Factors; Vertebrates: body movement. Posture. Locomotion. Flight. Swimming. Physical exercise. Rest. Sports; Womens health; Workloads; Young Adult; Aerobic capacity; Cardiac output; Training intensity; Physical conditioning; Stroke volume; Physical exercise; Human; Obesity; Physical training; Intensity; Nutrition disorder; Running locomotion; Overweight; Sport; Blood volume; Female; Conditioning; Nutritional status; Interval
• ISSN: 1439-6319; 1439-6327; 1439-6327
• DOI: 10.1007/s00421-010-1777-z

Very high-intensity, low-volume, sprint interval training (SIT) increases muscle oxidative capacity and may increase maximal oxygen uptake ( ), but whether circulatory function is improved, and whether SIT is feasible in overweight/obese women is unknown. To examine the effects of SIT on and circulatory function in sedentary, overweight/obese women. Twenty-eight women with BMI > 25 were randomly assigned to SIT or control (CON) groups. One week before pre-testing, subjects were familarized to testing and the workload that elicited 50% was calculated. Pre- and post-intervention, circulatory function was measured at 50% of the pre-intervention , and a GXT was performed to determine . During the intervention, SIT training was given for 3 days/week for 4 weeks. Training consisted of 4–7, 30-s sprints on a stationary cycle (5% body mass as resistance) with 4 min active recovery between sprints. CON maintained baseline physical activity. Post-intervention, heart rate (HR) was significantly lower and stroke volume (SV) significantly higher in SIT (−8.1 and 11.4%, respectively; P  < 0.05) during cycling at 50% ; changes in CON were not significant (3 and −4%, respectively). Changes in cardiac output ( ) and arteriovenous oxygen content difference [(a − v)O 2 diff] were not significantly different for SIT or CON. The increase in by SIT was significantly greater than by CON (12 vs. −1%). Changes by SIT and CON in HR max (−1 vs. −1%) were not significantly different. Four weeks of SIT improve circulatory function during submaximal exercise and increases in sedentary, overweight/obese women.