Being out of shape often manifests through increased fatigue during routine activities, shortness of breath with minimal exertion, persistent joint pain, and difficulty maintaining good posture. Observing changes in physical performance, such as a heightened effort required for tasks previously completed easily, or changes in body composition, can also indicate a decrease in fitness levels. Objective measures like body weight or fat percentage, alongside these subjective experiences and observational cues, provide a comprehensive understanding of your current fitness state.