LDL peroxidation in adolescent female gymnasts

Area of Science:

• Exercise Physiology
• Nutritional Biochemistry
• Cardiovascular Health

Background:

• Physical exercise can increase free radical formation in vivo.
• Low-density lipoproteins (LDL) are prone to oxidation, a key factor in atherosclerosis development.
• Understanding exercise effects on lipid profiles and redox status is crucial for athlete health.

Purpose of the Study:

• To evaluate the impact of intense, regular physical exercise on lipid profiles.
• To assess the effect of intense, regular physical exercise on redox status.
• To investigate these effects in adolescent gymnasts.

Main Methods:

• Clinical and anthropometric evaluations were performed on 20 adolescent gymnasts.
• Blood samples analyzed lipid profiles (cholesterol, HDL, LDL, triglycerides, apolipoproteins), plasma trace elements (Zn, Cu, Se), and red blood cell enzymes.
• Redox status was assessed via malondialdehyde (MDA) and MDA-LDL levels; eating habits were evaluated using a 24-hour recall.

Main Results:

• Gymnasts exhibited favorable lipid profiles with low total cholesterol, LDL-cholesterol, and Apo B, but high HDL-cholesterol and Apo A1.
• Higher total cholesterol and LDL-cholesterol correlated with lower plasma copper levels.
• Significant negative correlations were observed between MDA-LDL and zinc, copper, and transmembranar reductase (TMR).

Conclusions:

• Intense physical exercise in this cohort induced a beneficial lipid profile.
• Lower plasma copper and zinc levels were associated with increased susceptibility to LDL peroxidation.
• The observed correlation between MDA-LDL and TMR may indicate increased TMR consumption due to exercise-induced oxidative stress.