Assertion: calf raise | /r/HasProperty | done on raised surface
Facets:
value: lower than the toes
type: OTHER
value: to allow a greater stretch
type: PURPOSE
value: frequently
type: TEMPORAL
value: with the heel
type: MANNER
Source sentences:
text: They are frequently done on a raised surface with the heel lower than the toes to allow a greater stretch on the working muscles.