You're confusing etymology and meaning. The fact that 'sprint', in completely different usage, has that meaning, does not mean any of that connotation carries

You're confusing etymology and meaning. The fact that 'sprint', in completely different usage, has that meaning, does not mean any of that connotation carries over to this context. There is a clear rational purpose to breaking tasks up into parts. There are atomic units of work. Very few tasks can't be broken up into two-week segments.