Table 1. MFI-20 items.

a	+	1.	I feel fit
b		2.	Physically I feel only able to do a little
c	+	3.	I feel very active
d	+	4.	I feel like doing all sorts of nice things
a		5.	I feel tired
c	+	6.	I think I do a lot in a day
e	+	7.	When I am doing something, I can keep my thoughts on it
b	+	8.	Physically I can take on a lot
d		9.	I dread having to do things
c		10.	I think I do very little in a day
e	+	11.	I can concentrate well
a	+	12.	I am rested
e		13.	It takes a lot of effort to concentrate on things
b		14.	Physically I feel I am in a bad condition
d	+	15.	I have a lot of plans
a		16.	I tire easily
c		17.	I get little done
d		18.	I don't feel like doing anything
e		19.	My thoughts easily wander
b	+	20.	Physically I feel I am in an excellent condition

Codes preceding item numbers, referring to subscales:

a general fatigue.

b physical fatigue.

c reduced activity.

d reduced motivation.

e mental fatigue.

+ positively stated.

Answer categories:

yes, that is true.

no, that is not true.