The Protective Effect of High-Pressure Ischemic Preconditioning on Rowing Performance During Consecutive 2000-m...

Area of Science:

• Exercise Physiology
• Sports Science
• Cardiovascular Research

Background:

• Ischemic preconditioning (IP) involves brief periods of ischemia and reperfusion.
• Low- and high-pressure ischemic preconditioning (LIPC and HIPC) are variations of IP.
• The effects of LIPC and HIPC on rowing performance and muscle oxygenation require further investigation.

Purpose of the Study:

• To examine the effects of LIPC and HIPC on muscle oxygenation, physiological responses, and performance during repeated 2000-m rowing trials.
• To compare the efficacy of LIPC and HIPC against a traditional warm-up protocol.

Main Methods:

• A counterbalanced, repeated-measures crossover study involving eleven elite high school rowers.
• Participants underwent three warm-up protocols: control (CON), LIPC (100-190 mmHg), and HIPC (210-300 mmHg).
• Measurements included blood lactate, heart rate, RPE, muscle tissue oxygen saturation (StO2), mean power, and time for two 2000-m rowing efforts.

Main Results:

• Both LIPC and HIPC induced significantly greater reductions in vastus lateralis StO2 compared to CON.
• No significant differences were observed in blood lactate, heart rate, or RPE between groups.
• HIPC significantly improved second-trial rowing performance and mean power output compared to CON and LIPC, with consistent pacing.

Conclusions:

• Ischemic preconditioning, particularly HIPC, enhances repeated high-intensity rowing performance.
• HIPC improves muscle oxygen extraction and sustains power output during intense exercise.
• IP offers practical benefits for endurance athletes seeking to optimize performance.