Think of a lid and a jar: the lid fits, so it can do the job. Fitness can be thought of as that matching — how well something measures up to what a job actually asks for. The gym sense sits inside the same picture: a fit body is a body that measures up to what running, lifting or a long day of work demands of it.
From the word’s history
Fitness first meant 'the state or quality of being suitable' (1570s), from the adjective fit 'suited to the circumstances, proper' (mid-15c.) + -ness. Fit only took on the athletic sense 'in condition, properly trained for action' by 1869, and fitness in the sense 'state of being physically fit' is recorded from 1935 — so the health meaning is a late branch off the older idea of measuring up to what is required.
fitness 最早(1570 年代)就是「適合、恰當」的意思,由形容詞 fit(15 世紀中,「合乎情況的、恰當的」)加字尾 -ness 造成。fit 一直到 1869 年才出現運動上「狀態好、練到可以上場」的用法,而 fitness 指「身體狀況好」更晚到 1935 年才有紀錄。所以「體能」是從比較老的「合得上要求」那個意思後來長出來的一支。
Online Etymology Dictionary (etymonline.com), entries 'fitness' and 'fit (adj.)'
原始詞典資料4 筆記錄
以下是外部詞典記錄的用法,摘錄並精簡格式,我們還沒有寫成教學內容。上面的說明才是我們自己寫的;有些用法可能上面已經講過了。
fitnessnoun/ˈfɪt.nəs/
- 1
The condition of being fit, suitable or appropriate.
- Having introduced my two characters separately, let me present them together. Why not? He, young, wealthy, honorable; she also young, also intelligent — why not bring them together? There is an eternal fitness in all things, and nothing more so than in the case of man and woman.
- That's chiefly why they're coming; I want you to meet them here and then tell me frankly what you think of their fitness for whatever we decide on doing.
- 2
The cultivation of an attractive and/or healthy physique.
- Carroll has been edging slowly towards full fitness after his expensive arrival from Newcastle United and his partnership with £23m Luis Suarez showed rich promise as Liverpool controlled affairs from start to finish.
- 3
An organism's or species' degree of success in finding a mate and producing offspring.
- 4
slangThe condition of being attractive, fanciable or beautiful.
摘錄自 英文維基詞典 English Wiktionary,已精簡格式;依 CC BY-SA 4.0 授權使用,改動後的內容同樣以此授權提供。