Assertion: calf | /r/HasProperty | one of the most difficult
Facets:
value: with all of this in mind
type: OTHER
value: of all the muscle groups
type: OTHER
value: traditionally
type: OTHER
Source sentences:
text: Of all the muscle groups that bodybuilders focus on, calves have traditionally been one of the most difficult to make grow.
text: With all of this in mind, the calves aren’t the most difficult muscle to activate, but they certainly don’t activate as well as smaller muscles (15).