Four Stair Descend Test Functional Test

**Semantic type:** Intellectual Product

**Definition:** A timed function test, one of a series of exercise testing modalities that were initially introduced in the 1960s, that measures functional mobility by assessing the time taken and techniques used to descend four standard-size stairs.

**Synonyms:** - 4 Stair Descend - 4-STAIR DESCEND - D4STR1