Table 2.

Factor structure matrix with communalities of each item and eigenvalues, and % of variance accounted for each factor.

Preliminary item	Content	Factor		Communality coefficient
		1	2
No.2	I feel refreshed.	0.77	−0.57	0.60
No.1	My body is full of energy.	0.76	−0.53	0.59
No.15	My limbs feel strong and light.	0.76	−0.49	0.59
No.4	I feel rejuvenated when I wake up in the morning.	0.74	−0.43	0.53
No.11	My chest feels clear and fresh.	0.70	−0.45	0.49
No.8	My breathing feels comfortable.	0.68	−0.47	0.48
No.14	I am full of energy even if I go out for two days in a row (excluding going out for work or study).	0.67	−0.45	0.49
No.12	I do not get tired even if I walk or stand for more than 30 min.	0.66	−0.44	0.48
No.5	My body does not feel stiff anywhere.	0.65	−0.33	0.46
No.10	My lower abdomen is warm.	0.59	−0.35	0.37
No.7a	My head feels heavy and achy.	0.57	−0.35	0.36
No.19	I have a passion for life.	0.58	−0.81	0.65
No.17	I am active and enthusiastic in everything I do.	0.50	−0.76	0.58
No.28	I am confident.	0.55	−0.75	0.59
No.21	I look forward to every new day.	0.52	−0.74	0.56
No.29	I feel hopeful about the future.	0.55	−0.73	0.58
No.20	I am usually cheerful.	0.48	−0.73	0.54
No.25	I am pleasantly immersed when I am doing something.	0.43	−0.72	0.54
No.23	I am excited by the idea of what I want to do.	0.34	−0.70	0.52
No.31	I find a positive side even in difficult situations.	0.48	−0.69	0.48
No.30	I find it interesting and fun even if something is repeated.	0.46	−0.58	0.40
No.32	I wonder about the meaning of the things I experience.	0.25	−0.52	0.31
Eigenvalues		9.60	2.22
% of variance		43.65	10.11

Factor 1 = physical vitality, factor 2 = psychological vitality. ^aReversed item. Bold text indicates which factor the item is included in.