The logic is simple. A horse coming back too soon after a certain distance workout might be sore from that workout. An extra day's rest may prove to be more beneficial. However, few horses will win if the other contenders have larger problems.

f - Furlongs / B - Breezing / H - Handled

Days Before Race	1	2	3	4	5	6+
Workout Distance=> 3f-B	--	--	--	--	--	--
Workout Distance=> 3f-H	Out	--	--	--	--	--
Workout Distance=> 4f-B	Out	Out	--	--	--	--
Workout Distance=> 4f-H	Out	Out	Out	--	--	--
Workout Distance=> 5f-B	Out	Out	Out	--	--	--
Workout Distance=> 5f-H	Out	Out	Out	Out	--	--
Workout Distance=> 6f-UP	Out	Out	Out	Out	Out	--

Sincerely ... Kep, "The Handicapper"