Time-Trial Performance in Elite Speed Skaters After Remote Ischemic Preconditioning

Area of Science:

• Sports Science
• Exercise Physiology
• Cardiovascular Research

Background:

• Speed skating causes lower limb deoxygenation, potentially impacting performance.
• The acute effects of deoxygenation in speed skating are not fully understood.
• Remote ischemic preconditioning (RIPC) is explored for its potential to mitigate these effects.

Purpose of the Study:

• To investigate if RIPC can alter muscular oxygenation during speed skating.
• To determine if RIPC improves 1000-m time-trial performance in elite speed skaters.

Main Methods:

• Randomized, single-blind, placebo-controlled, crossover study with 9 elite speed skaters.
• Participants completed 1000-m time trials after RIPC or a sham procedure.
• Near-infrared spectroscopy (NIRS) monitored muscle oxygenation in the vastus lateralis.

Main Results:

• RIPC demonstrated a negligible effect on overall performance and NIRS variables compared to sham.
• A subgroup of sprinters showed a likely decrease in tissue saturation index at the trial's start.
• Metabolic changes in the subgroup included increased deoxyhemoglobin-deoxymyoglobin and possibly total hemoglobin-myoglobin.

Conclusions:

• RIPC does not provide a practical ergogenic benefit for 1000-m speed skating in elite athletes.
• Further research is needed to explore RIPC's role in training for increased physiological stress in sprinters.