Sprint Interval Training in Young Sedentary Adults

NCT07596836 | Completed

• 1 other identifier: ST-SIT-VO2MAX-2026
• Study Type: interventional
• Target: 40
• Locations: 1 country
• Sites: 1

Brief Summary

This randomized controlled trial evaluated the effects of a 6-week supervised sprint interval training program on cardiorespiratory fitness in healthy sedentary young adults. Forty participants aged 20 to 25 years were randomly assigned to either a sprint interval training group or a control group. The sprint interval training group completed supervised cycle-ergometer sessions three times per week for 6 weeks, while the control group maintained their usual sedentary routine. The primary outcome was maximal oxygen uptake (VO2max). Secondary outcomes included resting heart rate and 6-minute walk test distance. The study aimed to determine whether a short-term, time-efficient sprint interval training program could improve cardiovascular capacity and functional exercise performance in sedentary young adults.

Conditions

Sedentary Lifestyle; Cardiorespiratory Fitness

Keywords

Sprint interval training; VO2max Cardiorespiratory fitness Resting heart rate 6-minute walk test Sedentary adults Young adults Randomized controlled trial

Outcome Measures

Primary Outcomes (2)

• Change in Resting Heart Rate

  Resting heart rate was measured in the morning after 10 minutes of seated rest using a heart rate monitor. Values were recorded in beats per minute before and after the 6-week intervention.

  Baseline and 6 weeks

• Change in Maximal Oxygen Uptake (VO2max)

  VO2max was assessed using a maximal exercise test on a cycle ergometer with breath-by-breath respiratory gas analysis. VO2max values were recorded in ml/kg/min before and after the 6-week intervention.

  Baseline and 6 weeks

Study Arms (2)

Sprint Interval Training Group

EXPERIMENTAL

Participants in this group completed supervised sprint interval training sessions on a cycle ergometer three times per week for 6 weeks.

Behavioral: Sprint Interval Training

Control Group

NO INTERVENTION

Participants in this group maintained their usual sedentary routine and did not receive an additional exercise program during the study period.

Interventions

Sprint Interval Training BEHAVIORAL

The sprint interval training intervention consisted of supervised cycle-ergometer sessions performed three times per week for 6 weeks. Each session included a 5-minute warm-up at 50% VO2max, followed by 4 to 6 repetitions of 30-second all-out sprint bouts on a Monark 894E cycle ergometer, with 4-minute active recovery periods between sprints. The number of sprint repetitions was progressively increased from 4 repetitions in the first two weeks to 6 repetitions in the following four weeks.

Also known as: SIT

Sprint Interval Training Group

Eligibility Criteria

• Age: 20 Years - 25 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Aged between 20 and 25 years Healthy sedentary adult Engaging in less than 150 minutes per week of moderate-to-vigorous physical activity IPAQ score below 600 MET-min/week or not participating in any regular exercise program Willing to provide written informed consent

You may not qualify if:

• Known history of cardiovascular, pulmonary, or metabolic disease, such as hypertension or diabetes Musculoskeletal injury or orthopedic condition that would prevent exercise participation Pregnancy or breastfeeding Smoking Regular medication use

Sponsors & Collaborators

• Sezer Taştan: lead

Study Sites (1)

Ankara Demirspor

Ankara, Ankara, 06000, Turkey (Türkiye)

Location

MeSH Terms

Conditions

Sedentary Behavior

Interventions

High-Intensity Interval Training

Condition Hierarchy (Ancestors)

Behavior

Intervention Hierarchy (Ancestors)

Physical Conditioning, Human; Exercise; Motor Activity; Movement; Musculoskeletal Physiological Phenomena; Musculoskeletal and Neural Physiological Phenomena

Study Officials

• Sezer Taştan, phD

  Ankara Demirspor

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Masking Details: No masking was used because participants and research staff were aware of the exercise-training intervention.
• Purpose: OTHER
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR INVESTIGATOR
• PI Title: Principal Investigator

Model Details: Participants were randomly assigned in a 1:1 ratio to either a supervised sprint interval training group or a control group.

Study Record Dates

• First Submitted: May 13, 2026
• First Posted: May 19, 2026
• Study Start: March 11, 2026
• Primary Completion: April 22, 2026
• Study Completion: April 22, 2026
• Last Updated: May 19, 2026

Record last verified: 2026-05

Locations

TU (1)