What is the clinical evidence from this study?

Study design: RCT. Population: Healthy, sedentary young adults (n=46). Intervention: Single-sprint training vs. No training intervention. Primary outcome: Change in forearm post-occlusive reactive hyperemia (PORH) via ultrasound (cm/s) (p=BFincl = 0.177).

What question did this study set out to answer?

This research aims to determine if brief intense exercise bouts can improve vascular and cardiorespiratory function.

June 24, 2026Frontiers in PhysiologyOpen Access

Cardiorespiratory and vascular function outcomes following 4 weeks of single-sprint training

View Full Paper

Ask AI

Bookmark

Key result

Single-sprint training fails to improve vascular or cardiorespiratory function in healthy young adults.

P BFincl = 0.177
n=46

Why the study?

Does a 4-week single-sprint training program improve vascular and cardiorespiratory function in healthy young adults?

Population

46 healthy participants ages 18–35

Comparison

20s maximal cycling sprint 3 days/week for 4 weeks vs No training intervention

Follow-up

4 weeks

Authors

MCMatthew A. ChatlaongUniversity of Mississippi JBJ. BentleyUniversity of Mississippi HDHannah C. DowellUniversity of Mississippi

Discussion

Member takes

Implication

No benefit from 4-week sprint training on vascular or cardiorespiratory function in healthy young adults; leaves open effects in clinical populations or with longer protocols.

Key Points

This research aims to determine if brief intense exercise bouts can improve vascular and cardiorespiratory function.
Randomized trial with 46 healthy participants aged 18-35 assigned to training (n=24) and control (n=22) groups.
Training involved 20s maximal cycling sprints, 3 days/week, without warm-up or cool-down.
Assessments included post occlusive reactive hyperemia, flow-mediated dilation, and graded exercise testing at pre-, mid-, and post-intervention.
No significant training effect on vascular and cardiorespiratory outcomes was observed.
Forearm post occlusive reactive hyperemia changes were 0.35 (11.61) for training vs. -1.59 (10.06) for control.
Maximal oxygen uptake changes were 0.00 (0.19) for training vs. 0.05 (0.14) for control.

Study Design

Type

RCT (n=46)

Blinding

Open-label

Randomization

Random draw procedure

Multicenter

Structured PICO

Does a 4-week single-sprint training program improve vascular and cardiorespiratory function in healthy young adults?

Population

46 healthy participants ages 18–35

Intervention

20s maximal cycling sprint (no warm-up or cool-down) 3 days/week for 4 weeks

Comparator

No training intervention

Outcome

Vascular function (assessed via post occlusive reactive hyperemia, brachial flow-mediated dilation, and passive leg movement hyperemia) and cardiorespiratory fitness (assessed via graded exercise testing) at 4 weekssurrogate

Main Result

Absolute Event Rate: 0.35% vs -1.59%

p-value: p=BFincl = 0.177

A 4-week program of brief intense exercise bouts (20s maximal cycling sprint 3 days/week) did not produce meaningful improvements in vascular or cardiorespiratory function in healthy young adults.

Limitations

Short intervention duration of 4 weeks
Missing data for some participants due to poor ultrasound or NIRS signal quality
Did not account for menstrual cycle phase systematically

Cite This Study

Chatlaong et al. (2026) conducted an RCT in Healthy, sedentary young adults (n=46). Single-sprint training vs. No training intervention was evaluated on Change in forearm post-occlusive reactive hyperemia (PORH) via ultrasound (cm/s) (p=BFincl = 0.177). Four weeks of single-sprint training consisting of a 20-second maximal cycling sprint 3 days per week did not meaningfully improve vascular or cardiorespiratory function in healthy young adults.

synapsesocial.com/papers/6a3c238ad15afadd906fa4ca https://doi.org/10.3389/fphys.2026.1741749

Topics

Cardiac Rehabilitation and Lifestyle Interventions

View Full Paper

Ask AI

Bookmark

Implication

No benefit from 4-week sprint training on vascular or cardiorespiratory function in healthy young adults; leaves open effects in clinical populations or with longer protocols.

Cardiorespiratory and vascular function outcomes following 4 weeks of single-sprint training

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Main Result

Limitations

Cite This Study

Topics

Cardiorespiratory and vascular function outcomes following 4 weeks of single-sprint training

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Main Result

Limitations

Cite This Study

Also Consider

Topics

Also Consider