Table 1.

Demographics and self-reported perceived exertion for the 47 participants with complete measurements

Individual Characteristics	N	%
Gender
Female	41	87
Male	6	13
Job
Nurse	39	83
Patient care assistant	8	17
Shift Length (hours)
8	22	47
10	1	2
12	24	51
	Mean	S.D.
Age (years)	42	13
BMI (kg/m2) (N=36)	26	4
Perceived Exertion Scale$	Score	S.D.
Current shift	13*	2
Typical shift	15+	2

^$Scales ranged from 6 (no exertion at all) to 20 (maximal exertion)

^*Somewhat hard (you feel tired but can continue)

⁺Hard (heavy)