Jogging is very beneficial. It's good for your legs and your feet. It's also very good for the ground. It makes it feel needed.

In Schulz’s characteristic deadpan style, the line parodies earnest health advice by extending it into absurd empathy for inanimate nature. The first sentences sound like conventional fitness boosterism, but the punchline—jogging being “good for the ground” because it “makes it feel needed”—turns the logic sideways. The humor depends on anthropomorphism: the ground is treated as a neglected participant in modern life, suddenly validated by being stepped on. As with much of Peanuts, the joke also hints at a gentle existential theme: the desire to be “needed” is universal, even if projected onto the most unlikely object.