Angiotensin-converting enzyme genotype and physical performance during US Army basic training

Area of Science:

• Exercise Physiology
• Human Genetics
• Sports Science

Background:

• Previous research indicated a link between angiotensin I-converting enzyme (ACE) genotype and enhanced physical performance in elite athletes.
• The applicability of these findings to broader, more diverse populations remained unclear.

Purpose of the Study:

• To investigate the association between ACE genotype and physical performance in a heterogeneous population of US Army recruits.
• To determine if ACE genotype influences changes in aerobic capacity and muscular endurance during basic military training.

Main Methods:

• ACE genotyping was performed using polymerase chain reaction on 147 US Army recruits (62 male, 85 female).
• Peak oxygen uptake and Army Physical Fitness Test (APFT) scores (including sit-ups, push-ups, and a 2-mile run) were assessed before and after an 8-week basic training program.
• Statistical analyses were conducted to compare performance metrics across different ACE genotypes (II, ID, DD).

Main Results:

• No statistically significant differences in peak oxygen uptake or APFT scores were observed between subjects with different ACE genotypes, either before or after training.
• While the II genotype group showed slightly higher APFT scores, these differences did not reach statistical significance.
• Adjusted analyses, accounting for baseline fitness, revealed no ACE genotype-related performance advantages.

Conclusions:

• ACE genotype does not appear to be a strong determinant of aerobic power or muscular endurance in healthy, young, ethnically diverse American adults.
• The findings suggest that the influence of ACE genotype on physical performance may be population-specific and less pronounced in heterogeneous groups.