Does Shoulder Position Affect Biceps Growth? 🤔💪 Long-held theories have held that training the biceps in a lengthened position (like the Bayesian curl) leads to greater hypertrophy than a shortened position (like the preacher curl), as seen in other muscles like the hamstrings. But a 2025 study by Attarieh et al. put this to the test! 🔬 👨‍🔬 What did they test? Researchers compared the two exercises with identical resistance profiles but different shoulder positions: ✅ Preacher Curl – Biceps