Glucosamine Supplementation Improves Physical Performance in Trained Mice.

Area of Science:

• Exercise Physiology
• Nutritional Biochemistry
• Mitochondrial Biology

Background:

• d-Glucosamine (GlcN) is a popular dietary supplement with anti-inflammatory properties.
• GlcN is traditionally used for osteoarthritis and has shown life-extending benefits in animal models.
• Its effects on athletic performance and mitochondrial function remain largely unexplored.

Purpose of the Study:

• To investigate the ergogenic potential of GlcN supplementation in aerobically trained mice.
• To assess GlcN's impact on mitochondrial biogenesis, physical performance, and oxidative stress.
• To evaluate dose-dependent effects of GlcN on exercise capacity.

Main Methods:

• Mice underwent 6 weeks of aerobic training with GlcN doses of 250, 500, or 1000 mg/kg.
• Exercise performance was measured via grip strength, motor coordination, and running capacity.
• Skeletal muscle analysis included mitochondrial biogenesis markers, oxidative stress, and antioxidant enzyme levels.

Main Results:

• GlcN supplementation increased mitochondrial biogenesis markers in trained mice.
• Improved motor coordination was observed in GlcN-supplemented groups.
• A potential synergistic effect between GlcN and exercise training on running distance was noted.

Conclusions:

• GlcN supplementation, at human-equivalent doses, enhances mitochondrial adaptations to exercise.
• GlcN may improve physical performance metrics, particularly motor coordination.
• Further research is warranted to confirm GlcN's ergogenic potential in athletes.