Minimalist involves running in light, flexible footwear with no cushion or a raised heel, to allow the foot to move naturally, restore strength and proprioception, and to improve foot strike.

Running in Minimalist Shoes Better for Achilles Tendon than Traditional Running Shoes
The flat, ‘heelless’ construction of a minimalist shoe was found to free up more elastic energy in the Achilles, resulting in better running economy as compared with cushioned heeled running shoes.