Can Changes in Sit-To-Stand Performance Throughout A 30-S Time Interval Be Used as A Marker of Performance Fatigability in Middle-Aged To Older Adults?

Table 1. Baseline characteristics of participants (mean ± standard deviation)

		Middle-aged		Older adults		Significance level (p-value) *
Parameters		Males (N = 50)	Females (N = 43)	Males (N = 48)	Females (N = 54)	Age	Sex
Age (years)		61.7 ± 2.6	59.1 ± 3.0	71.5 ± 4.8	71.4 ± 5.3	< .001	.029
Body mass (Kg)		81.2 ± 11.9	67.5 ± 11.5	83.0 ± 10.0	66.5 ± 11.7	.724	< .001
Height (cm)		176.7 ± 6.5	164.7 ± 4.9	174.9 ± 5.9	161.3 ± 6.3	< .001	< .001,
BMI (Kg/m²)		26.0 ± 3.5	24.9 ± 4.3	27.1 ± 3.0	25.6 ± 4.3	.138	.015
30sSTS	Repetitions (#)	18.0 ± 2.4	18.0 ± 2.2	16.4 ± 2.3	15.5 ± 2.6	< .001	.175
	Relative power (W/Kg)	4.25 ± 1.12	3.24 ± 0.40	3.84 ± 0.66	2.87 ± 0.63	< .001	< .001
	Allometric Power (W/m²)	109.0 ± 21.9	80.5 ± 15.8	103.9 ± 19.5	72.0 ± 13.0	< .001	< .001

BMI = body mass index; 30sSTS = 30-second sit-to-stand test.* P-values are from two-way ANOVA with age group and sex as fixed factors.