Signs indicating a need for a fitness routine change include plateauing in performance, loss of motivation, signs of overtraining, or frequent fatigue. If workouts feel repetitive or no longer challenging, it's time to reassess goals. Changes in physical health, such as joint pain or lingering injuries, may also signal that the current routine isn't suitable. A lack of progress in attaining desired results can suggest that the program needs modifications. Listening to one's body and feeling like workouts lack enjoyment are essential cues for change.