How do I adjust fitness goals when a client's life gets derailed?

You have learned to set good goals, which is real skill. The part that still trips you is when life knocks a client off course and the plan no longer fits. That is harder, because it asks you to let go of the goal you carefully built and meet the person where they actually are. A goal is a tool, not a promise carved in stone. When a client's life gets hard, the point is not to defend the original plan. It is to keep them moving in the right direction at whatever pace their life now allows. Shrinking a goal is not failing them. It is keeping them in the game so they do not quit entirely. A smaller goal reached beats a big one abandoned. Next time life derails someone, ask them what they can realistically do this week, then build from that. You are not lowering your standards. You are adjusting the map because the road changed, which is exactly what a good guide does.