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Most resolutions don’t fizzle because we’re lazy—they fail because our brains misjudge the tradeoff between effort and reward. We break down the science of dopamine and show how this powerful neurotransmitter influences whether you focus on benefits or get stuck on perceived costs. From the striatum’s caudate nucleus to real-world habit design, we connect research to practical steps you can use today to make goals in fitness, money, and health actually stick.