Physiological and Perceptual Responses During 4-Second Exercise

NCT ID: NCT06912932

Last Updated: 2025-04-06

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

11 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-04-04

Study Completion Date

2024-10-02

Brief Summary

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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

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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.

Conditions

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Cardiovascular Fitness

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

NONE

Study Groups

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50% Pmax and 15-s rest duration

Participants used 50% Pmax and 15-s rest duration during 30 bouts of 4-s sprint interval training.

Group Type ACTIVE_COMPARATOR

Preventive

Intervention Type BEHAVIORAL

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.

50% Pmax and 30-s rest duration

Participants used 50% Pmax and 30-s rest duration during 30 bouts of 4-s sprint interval training.

Group Type ACTIVE_COMPARATOR

Preventive

Intervention Type BEHAVIORAL

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.

50% Pmax and 45-s rest duration4

Participants used 50% Pmax and 45-s rest duration during 30 bouts of 4-s sprint interval training.

Group Type ACTIVE_COMPARATOR

Preventive

Intervention Type BEHAVIORAL

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.

75% Pmax and 15-s rest duration

Participants used 75% Pmax and 15-s rest duration during 30 bouts of 4-s sprint interval training.

Group Type ACTIVE_COMPARATOR

Preventive

Intervention Type BEHAVIORAL

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.

75% Pmax and 30-s rest duration

Participants used 75% Pmax and 30-s rest duration during 30 bouts of 4-s sprint interval training.

Group Type ACTIVE_COMPARATOR

Preventive

Intervention Type BEHAVIORAL

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.

75% Pmax and 45-s rest duration

Participants used 75% Pmax and 45-s rest duration during 30 bouts of 4-s sprint interval training.

Group Type ACTIVE_COMPARATOR

Preventive

Intervention Type BEHAVIORAL

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.

All-out Pmax and 15-s rest duration

Participants used all-out Pmax and 15-s rest duration during 30 bouts of 4-s sprint interval training.

Group Type EXPERIMENTAL

Preventive

Intervention Type BEHAVIORAL

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.

all-out Pmax and 30-s rest duration

Participants used all-out Pmax and 30-s rest duration during 30 bouts of 4-s sprint interval training.

Group Type EXPERIMENTAL

Preventive

Intervention Type BEHAVIORAL

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.

all-out Pmax and 45-s rest duration

Participants used all-out Pmax and 45-s rest duration during 30 bouts of 4-s sprint interval training.

Group Type EXPERIMENTAL

Preventive

Intervention Type BEHAVIORAL

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.

Interventions

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Preventive

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.

Intervention Type BEHAVIORAL

Eligibility Criteria

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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.
Minimum Eligible Age

18 Years

Maximum Eligible Age

30 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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University of Texas at Austin

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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Human Performance Laboratory, Department of Kinesiology and Health Education, the University of Texas at Austin

Austin, Texas, United States

Site Status

Countries

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United States

Other Identifiers

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STUDY00004240-CR01

Identifier Type: -

Identifier Source: org_study_id

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