Improved VO2max and Cardiac Output in Response to Training
Conditions
Keywords
HIIT, Inactive, Women
Brief summary
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.
Detailed description
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.
Interventions
OTHERHigh intensity interval training
Repeated, brief, and intense exercise bouts separated by active recovery
Sponsors
California State University, San Marcos
Study design
Allocation
NON_RANDOMIZED
Intervention model
SEQUENTIAL
Primary purpose
PREVENTION
Masking
NONE
Intervention model description
This study was a longitudinal, repeated measures between subjects design.
Eligibility
Sex/Gender
FEMALE
Age
18 Years to 45 Years
Healthy volunteers
Yes
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in baseline in VO2max at 3 weeks | 3 weeks | Each participant performed VO2max testing on an electronically-braked cycle ergometer using a ramp protocol. During exercise, subjects expired through a plastic mouthpiece and low resistance valve into tubing connected to a mixing chamber. Measures of ventilation and expired fractions of oxygen and carbon dioxide were obtained throughout exercise by a metabolic cart. Gas exchange data including VO2, VCO2, and ventilation were time-averaged every 15 seconds. The test was terminated when the subject's pedal cadence was below 50 rev/min. |
| Change in baseline in cardiac output max at 3 weeks | 3 weeks | During the VO2max assessment, participants wore a thoracic impedance device to measure heart rate and stroke volume, calculating their cardiac output. |
Countries
United States
Outcome results
None listed