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A Real-World High-Intensity Interval Training Protocol for Cardiorespiratory Fitness Improvement

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Does Sprint Interval Training Cause Interference in Concurrent Training? A Meta-Analysis Study.

Diego Ferraro Farro^1,2, Marcelo Guimarães³, Eduarda Blanco-Rambo³

¹Department of Physical Education and Health, University of the Republic Uruguay, Montevideo, Uruguay.

International Journal of Sports Medicine

|February 24, 2026

Summary

This summary is machine-generated.

Sprint interval training (SIT) combined with resistance training (RT) improves cardiorespiratory fitness without hindering strength or power. Short sprints may enhance jump performance in concurrent training programs.

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Area of Science:

Exercise Physiology
Sports Science
Human Performance

Background:

Concurrent training (CT) combining endurance and strength can cause interference effects.
Sprint interval training (SIT) is proposed to mitigate CT interference.
Limited research exists on SIT-based CT's impact on neuromuscular and cardiorespiratory adaptations.

Purpose of the Study:

To systematically review and meta-analyze the effects of SIT-based CT on strength, hypertrophy, VO₂max, and sprint performance.
To compare SIT+RT interventions against resistance training (RT) alone.

Main Methods:

Systematic review and meta-analysis adhering to PRISMA 2020 guidelines.
Searched PubMed, Embase, and SPORTDiscus for eligible randomized controlled trials.
Included studies with healthy adults (≥18 years) involving at least six supervised sessions over two weeks.

Main Results:

No significant differences were found in lower-body strength, upper-body strength, jump performance, or sprint performance between SIT+RT and RT alone.
SIT+RT significantly improved maximal oxygen consumption (VO₂max) compared to RT alone.
Short sprint protocols (≤10 s) within SIT-based CT showed greater improvements in jump performance.

Conclusions:

Incorporating SIT into CT enhances cardiorespiratory fitness without compromising strength or power.
SIT-based CT may potentiate jump performance, particularly when utilizing short sprint durations.
SIT presents a viable option to attenuate potential interference effects in concurrent training.