Cardiovascular Fitness
Conditions
Keywords
exercise, cardiovascular fitness, sprint, vo2max, interval training
Brief summary
The purpose of this study is to investigate the acute effects of different intensities (i.e., 50, 75, and 100% of maximal anaerobic power) of 4-s sprint interval exercise on physiological responses. Secondly, it will determine the relationship between intensity and recovery duration (i.e., 15, 30, or 45-s) that will stimulate the cardiovascular and metabolic systems.
Detailed description
Background Short sprint interval training (sSIT) is typically performed at maximal intensity, generating power far above what is needed to reach peak oxygen consumption (VO₂peak). However, the physiological effects of submaximal sprint intensities and different recovery periods are not well understood. Study Aim This study examined how power output and oxygen consumption (VO₂) respond to repeated 4-second sprints at 50%, 75%, and 100% of maximal power (Pmax) with rest periods of 15, 30, or 45 seconds. Methods Eleven recreationally active participants completed nine trials, each consisting of thirty 4-second cycling sprints under different intensity and recovery conditions.
Interventions
BEHAVIORALPreventive
systematically investigate the acute physiological responses induced by three levels of %Pmax intensities (50% and 75% of Pmax and all-out efforts) with three varying rest periods (15, 30, and 45-s) between thirty 4-s sprints.
Sponsors
University of Texas at Austin
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
BASIC_SCIENCE
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 30 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 | From enrollment (Day 1) to the end of treatment (9 trials) (Day 11), through study completion, an average of 5 weeks. | The %VO2peak associated with repeated submaximal power sprints (%Pmax), particularly when paired with varying rest periods, remains unknown. The aim of this study was to systematically investigate the cardiovascular changes for better exercise programming, measured in mL/min/kg. |
Countries
United States
Outcome results
None listed