Cardiovascular Fitness
Conditions
Keywords
exercise, cardiovascular fitness, sprinting, performance
Brief summary
High-intensity interval training (HIIT) is an effective tool to improve cardiovascular fitness and maximal anaerobic power. Different methods of HIIT have been studied but the effect of a maximal effort cycling and very short exercise time (i.e., 4-s) with short recovery time (15-30 s) and a high number of repetitions (i.e., 30 bouts) is unknown.
Detailed description
The investigators examined the effects of training at maximal anaerobic power during cycling (PC) on maximal anaerobic power, peak oxygen consumption (VO2peak), and total blood volume in 11 young healthy individuals (age: 21.3±0.5 y) (6 men, 5 women). Methods: Participants trained three times a week for eight weeks performing a PC program consisting of 30 bouts of 4-s at an all-out intensity (i.e., 2 minutes of exercise per session). The cardiovascular stress progressively increased over the weeks by decreasing the recovery time between sprints (30 to 24 to 15-s) and thus session time decreased from 17 to \< 10 min.
Interventions
OTHER4-s sprint inertial load training
A program employing 30 bouts of 4s inertial load sprint training with progressively reduced recovery time (30 to 15 s) between sprints is effective for improving blood volume, VO2peak and maximal power.
Sponsors
University of Texas at Austin
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 49 Years
Healthy volunteers
Yes
Inclusion criteria
Young (18-30), Healthy, Recreationally active, but untrained (not meeting ACSM's recommendations of 150 min/week of moderate-vigorous aerobic exercise) -
Exclusion criteria
Cardiovascular disease Smoking Subjects who were exercising regularly (\>75 min/week) were excluded. \-
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Cardiovascular changes | Pre and post training (8 weeks) | Maximal oxygen consumption (VO2max) is an indicator of health and fitness. The investigators measured VO2max with a graded exercise using electronically braked cycling ergometer. |
| Blood volume changes | Pre and post training (8 weeks) | Hematological variables can effect the performance of the people. The investigators measured total blood volume, red blood cell volume, and plasma volume before and after training. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Performance changes | Pre and post training (8 weeks) | Study participants trained at maximal anaerobic power for 4-s. Therefore, the investigators measured maximal anaerobic power with different testing methods. |
Countries
United States
Outcome results
None listed