⚠️ Elbow and Bicep Tendon Safety NoteThe preacher curl places the bicep in a fully lengthened position at the start of the movement — a position associated with proximal bicep tendon stress. Individuals with a history of bicep tendon tears, SLAP lesions, or active elbow tendinopathy should obtain medical clearance before heavy preacher curl training….

⚠️ Knee and Lower Back Safety NoteThe hack squat machine places the spine in a fixed incline that concentrates lower body loading at the knee joint. Individuals with active patellofemoral pain syndrome, patellar tendinopathy, or recent ACL reconstruction should obtain medical clearance before hack squat training — the fixed pad position prevents natural forward trunk…