Correct

筋道

/ jīn dào / 
Strokes

Example

As an Adjective

(of food) chewy; al dente

1
Kōngxīn
空心
miàn
面
chī
吃
qǐlai
起来
jiǎngjiu
讲究
jīndào
筋道
  
。
Miàn
面
yào
要
zhǔ
煮
de
得
gāng
刚
dào
到
huǒhòu
火候
  
,
miàn
面
xīn
心
yīngyǒu
应有
diǎnr  
点儿
jiáo
嚼
tóu
头
  
。

Spaghetti should be eaten al dente—cooked until just done and retaining some ‘bite' at the core.

2
Jīndào
筋道
miàntiáo
面条

chewy noodles

As an Adjective

(of an old person) sturdy

3
Zhège
这个
bāshí
八十
suì
岁
de
的
lǎotóu
老头
shēnzigǔ
身子骨
hái
还
hěn
很
jīndào
筋道
  
。

This old man, though 80 years old, is still very sturdy.