Table 8. Seriousness of the slipping incidents and the length of slips on glycerol
in the age groups of firefighters at the walking speeds of 100 and 120 stepsˇmin^-1.
The values are the number of subjects in each category (n) with the ranges of the slip distances in parentheses.

	Walking speed (stepsˇmin-1)
	100	120		100	120
	Age group (years)
	33-38			43-56
Seriousness of the slips	n (slip distance range, cm)			n (slip distance range, cm)
No corrective movement	1 (2)		1 (2)	2 (2)	1 (2)
Controlled slipa	8 (1-14)		7 (2-20)	9 (2-11)	7 (3-8)
Vigorous slipb	5 (13-20)		2 (20-50)	3 (40-50)	2 (15-40)
Extremely vigorous slipc	0		1 (50)	1 (25)	4 (30-50)
	n total 14		n total 11	n total 15	n total 14

a Balance could also be regained without the safety harness. b Loss of balance is possible without the safety harness. c Balance was lost and the subject was suspended by the safety harness.