Strength Training

Latest science on strength training for muscle growth, performance and health

Strength Training

The Hidden Costs of Steroid Use: Fertility and Health Risks in Recreational Lifters

This comprehensive review examined the growing trend of non-medical testosterone and anabolic-androgenic steroid (AAS) use among young men engaged in recreational strength training. Researchers synthesized current international evidence to understand the physical and psychological impacts of these substances. They found that while users often seek to enhance muscle mass and performance, they face severe, sometimes long-lasting consequences. Key findings highlight profound endocrine disruption, specifically the suppression of the hypothalamic-pituitary-gonadal axis, which leads to impaired sperm production and significant fertility disturbances. The study also noted that psychological factors—such as muscle dysmorphia, body-image concerns, and social pressure—heavily drive this behavior. The authors emphasize the urgent need for better clinical strategies to help users recover their natural hormone production and reproductive function after stopping steroid use, noting that long-term data on full recovery remains a limitation.

Eccentric Training Produces Greater Muscle Growth Than Concentric in Older Adults Meta-Analysis

A meta-analysis of 28 RCTs (n=1,450 participants aged 60+) found that eccentric-focused training produced 18% greater muscle hypertrophy, 23% greater strength gains, and significantly more improvement in functional capacity compared to traditional concentric training. Injury rates were comparable between groups when appropriate loading was used.