Akademik

ноги несут
• ПОКА НОГ И НОСЯТ <НЕСУТ> кого coll
[VPsubj; subord clause; usu. this WO]
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⇒ as long as a person has the strength to walk:
- пока X-a ноги носят{{}}≈ as long as X's legs can (will) carry him;
- as long as X is on his feet;
- as long as X can get about.

Большой русско-английский фразеологический словарь. — М.: ACT-ПРЕСС КНИГА. . 2004.