Drop : heel-to-toe offset of a running shoe
RunThe height gap (mm) between the heel and forefoot of the shoe.
A 10 mm drop (classic) lifts the heel, easing the calf and Achilles but encouraging a heel strike. A 0-4 mm drop ("minimalist") spreads load better but heavily loads the calf : transition progressively over several weeks.
In TriPaced:
TriPaced doesn't prescribe a brand or specific drop. But if you switch drops between blocks, log it as a session note: an Achilles flare-up the following week is rarely a coincidence.