Effect of Ethnicity on Changes in VO2max and Cardiac Output in Response to Short-Term High Intensity Interval Training

Effect of Ethnicity on Changes in VO2max and Cardiac Output in Response to Short-Term High Intensity Interval Training

The purpose of this study was to determine if ethnicity alters training responsiveness to a low dose of high intensity interval training in inactive women.

Prior to the session, women completed a 4-minute warmup at 10 % PPO. Each subject completed 9 sessions of HIIT over a 3-week period which consisted of eight to ten 1-minute bouts of cycling at 85% PPO with 75-second recovery between bouts at 10 % PPO. This protocol is well-tolerated in inactive individuals. Continuously during each session, heart rate was monitored using telemetry. On days 1, 3, 6, and 9 of training, the physical activity enjoyment scale (PACES) was completed. VO2max and cardiac output max were assessed prior to training, as well as post.

Inclusion Criteria:

• Women
• Between the age of 18-45
• Healthy and non-obese (BMI < 30 kg/m2)
• Perform less than 150 minutes per week of exercise in the last 12 months
• 100% Caucasian or 100% Hispanic

Exclusion Criteria:

• Injured
• Obese
• Active
• Mixed ethnicity