beta-Blockade used in precision sports: effect on pistol shooting performance

Area of Science:

• Sports Science
• Pharmacology
• Human Performance

Background:

• Performance in precision sports like marksmanship is susceptible to physiological factors.
• Adrenergic beta-1 receptors play a role in physiological responses to stress.

Purpose of the Study:

• To investigate the effect of metoprolol, a selective beta-1 receptor blocker, on pistol shooting performance.
• To determine if metoprolol improves shooting accuracy by mitigating hand tremor.

Main Methods:

• A double-blind, cross-over study involving 33 marksmen using standard pistols at 25 meters.
• Participants were administered metoprolol and a placebo in a randomized sequence.
• Shooting performance was measured, and cardiovascular variables were monitored.

Main Results:

• Metoprolol significantly improved pistol shooting performance by an average of 13.4% of possible improvement compared to placebo (P < 0.002).
• The most skilled athletes showed the greatest improvement with metoprolol.
• No correlation was found between shooting improvement and changes in heart rate, systolic blood pressure, or estimated maximum oxygen uptake.

Conclusions:

• Metoprolol effectively enhances pistol shooting performance, likely by reducing hand tremor.
• The observed benefits are attributed to the beta-1 receptor blocking action of metoprolol, potentially independent of significant cardiovascular changes.
• This suggests a specific mechanism for performance enhancement in precision tasks.