体力たいりょく
tairyoku

Noun

1. physical strength; power; stamina; endurance; vigor; resistance to disease

体力たいりょく維持いじするにはちゃんとべなければいけません。
tairyokuo iji suruniwa chanto tabenakereba ikemasen.
You must eat properly to keep up your strength.
Noun

2. strength (of a business, economy, etc.)