Four Weeks of Sprint Interval Training Improves 5-km Run Performance

Area of Science:

• Exercise Physiology
• Sports Science
• Cardiorespiratory Fitness

Background:

• Sprint interval training (SIT) is known for rapid cardiorespiratory fitness improvements.
• SIT requires less time and volume than traditional endurance training.
• The impact of short-term SIT on 5-km run performance remains unexplored.

Purpose of the Study:

• To investigate the effects of a 4-week SIT program on 5-km run performance.
• To assess changes in maximum oxygen uptake following short-term SIT.
• To compare the performance improvements between a SIT group and a control group.

Main Methods:

• Thirty healthy, untrained participants (18-25 years) were assigned to a control or SIT group.
• The SIT group underwent 4 weeks of training, 3 times weekly, with 3-8 maximal intensity sprints.
• Performance was measured via a 5-km time trial and an incremental treadmill test.

Main Results:

• Sprint interval training participants showed a 4.5% improvement in 5-km run performance (p < 0.001).
• Significant increases in absolute (4.9%, p = 0.04) and relative (4.5%, p = 0.045) maximum oxygen uptake were observed.
• The SIT group outperformed the control group in both 5-km performance and cardiorespiratory measures.

Conclusions:

• Short-term SIT is effective in significantly improving 5-km run performance in untrained young men.
• SIT serves as a time-efficient strategy for enhancing cardiorespiratory fitness and endurance.
• This study highlights SIT's potential as a practical training modality for improving running performance.