After testing AI-generated workout plans from Apple’s revamped Siri AI and ChatGPT, a tech journalist found only one program worth sticking with. The writer, a 36-year-old man who exercises regularly at home, fed both chatbots an identical prompt requesting a three-day hypertrophy-focused plan using only dumbbells and calisthenics, with sessions no longer than 45 minutes. Siri AI produced a plan with a “push” day for chest, shoulders, and triceps; a “pull” day for back, biceps, and rear delts; and a “legs and core” day. It suggested three sets of 8-12 reps with 60-90 seconds of rest between sets, and advised focusing on controlled movements and progressive overload. Each exercise included a short explanation. After working through both plans and consulting a professional personal trainer, the journalist concluded that one plan was “the better program by some margin,” while the other left them with a “one size fits all” regime. The article did not specify which AI provided the winning plan.