Programme hopping - switching workout programmes every 2-4 weeks chasing novelty - is one of the most common mistakes in the gym. New programmes feel productive because novelty creates muscle soreness (DOMS), which beginners confuse with an effective workout. But suitability for specific goals, not novelty, is what makes a programme effective. On the other extreme, running the same programme for years without variation leads to accommodation and stagnation.
The right time to change a programme is when: progress has completely stalled for 4-6 weeks despite proper recovery, nutrition, and deloads; you've achieved the stated goal of the programme; you've been running the programme for the typical recommended duration (usually 8-16 weeks depending on complexity); or the programme no longer aligns with your evolved goals (changed from fat loss focus to muscle building, for example).
Not-valid reasons to change: you're bored (boredom is not a valid performance indicator), you're sore (or not sore enough - soreness is a poor proxy for effectiveness), you saw a more exciting programme on social media, or you've hit a temporary rough week. Respect the time investment required for any programme to produce its intended results. Advanced programmes often take 8-12 weeks to truly show their value. The lifters who make the most progress are those who commit to a well-designed programme and execute it thoroughly before evaluating its effectiveness.