An unexpectedly busy afternoon leads to hours of continuous sitting, leaving the body stiff, low on energy, and reluctant to jump into a major workout. When you spend hours locked in back-to-back meetings or deep task focus, shifting gears feels genuinely difficult. Physical inertia sets in alongside mental fatigue. Waiting for an ideal, hour-long gap in the schedule often results in doing nothing at all, because the barrier to entry feels too high after a long day.