Physiological and Perceptual Responses During 4-Second Exercise

The University of Texas System (UT)

Status: Completed

Conditions: Cardiovascular Fitness

Treatments: Behavioral: Preventive

Study type: Interventional

Funder types: Other

Identifiers

NCT06912932

STUDY00004240-CR01

Details and patient eligibility

About

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.

Full 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.

Enrollment: 11 patients

Sex: All

Ages: 18 to 30 years old

Volunteers: Accepts Healthy Volunteers

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.

Trial design

Primary purpose: Basic Science

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: None (Open label)

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11 participants in 9 patient groups

50% Pmax and 15-s rest duration

Active Comparator group

Description:

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

Treatment:

Behavioral: Preventive

50% Pmax and 30-s rest duration

Active Comparator group

Description:

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

Treatment:

Behavioral: Preventive

50% Pmax and 45-s rest duration4

Active Comparator group

Description:

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

Treatment:

Behavioral: Preventive

75% Pmax and 15-s rest duration

Active Comparator group

Description:

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

Treatment:

Behavioral: Preventive

75% Pmax and 30-s rest duration

Active Comparator group

Description:

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

Treatment:

Behavioral: Preventive

75% Pmax and 45-s rest duration

Active Comparator group

Description:

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

Treatment:

Behavioral: Preventive

All-out Pmax and 15-s rest duration

Experimental group

Description:

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

Treatment:

Behavioral: Preventive

all-out Pmax and 30-s rest duration

Experimental group

Description:

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

Treatment:

Behavioral: Preventive

all-out Pmax and 45-s rest duration

Experimental group

Description:

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

Treatment:

Behavioral: Preventive