Physiological Responses to Maximal 4-s Sprint Interval Cycling

Not Applicable

Completed

• Conditions: Exercise, Cardiovascular Function, Fatigue, Muscular Power
• Interventions: Other: inertial-load exercise (ILE)

• Registration Number: NCT04448925
• Lead Sponsor: University of Texas at Austin

Brief Summary

The optimal recovery duration depends on the intensity of exercise and in the present study the intensity was maximal power for 4-s while cycling an 'Inertial Load' ergometer (ILE). Recovery duration of 15, 30 and 45-s were given between 30 successive sprints.

Detailed Description

All subjects completed an informed consent for this study that was approved by the Institutional Review Board of the University of Texas at Austin.

Study Overview. A randomized, cross-over experimental design was conducted. Each participant visited the laboratory on four occasions which were separated by two to five days. Measurement of body mass, familiarization with experimental procedures and cycling peak oxygen consumption test (VO2peak) were performed on the first visit. Participants took part in inertial-load exercise (ILE) on the remaining test days. On each separate session, a different inter-sprint recovery duration was employed (i.e. 15, 30 or 45-s). Cycling power output, pulmonary gas exchange, vastus lateralis de-oxygenation status, heart rate and blood lactate were measured.

Study Timeline

• Study Start: 2019-01-10
• Primary Completion: 2019-07-20
• Status Verified: 2020-06
• Study Completion: 2020-06-20
• Study First Submitted: 2020-06-23
• Study First Submitted QC: 2020-06-25
• Last Update Submitted: 2020-06-25
• Study First Posted: 2020-06-26
• Last Update Posted: 2020-06-26

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 16

Inclusion Criteria

• healthy participants

Exclusion Criteria

• unhealthy

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
Recovery duration 45 seconds	inertial-load exercise (ILE)	Resting for 45 sec
Recovery duration 30 seconds	inertial-load exercise (ILE)	Resting for 30 sec
Recovery duration 15 seconds	inertial-load exercise (ILE)	Resting for 15 sec

Primary Outcome Measures

Name	Time	Method
maximal leg power	10 min

Trial Locations

Locations (1)

University of Texas at Austin Human Performance Laboratory; 🇺🇸 Austin, Texas, United States