This is one of the most universally reported dream experiences, and its meaning is fairly consistent across dreamers: it reflects a specific, frustrating gap between the effort you're putting in and the results you're seeing.
Running from danger but going nowhere
The most common and distressing version — this usually appears during periods when you're working hard to escape or resolve a difficult situation, but the usual signs of progress aren't showing up, which is deeply demoralising even when the effort itself is genuine.
Running toward a goal but not advancing
A slightly different flavour of the same theme — this points more specifically to a goal you're actively pursuing (career, personal project, relationship repair) where your effort level feels disconnected from any visible movement toward the outcome.
Legs feeling heavy or moving in slow motion
Often adds a layer of exhaustion to the frustration — this variation frequently shows up during periods of genuine burnout, where the issue isn't lack of trying but a real depletion of energy.