Table 2. Mean of the change rate of performance indices in subjects.

	Study group
Index’s change rate	Probiotic	Control	p
	n=23 ‏(Mean±SD‏)	n=23 ‏(Mean±SD‏)
400 m crawl swimming record (min-sec)	-0.039±0.09	-0.005±0.02	0.222
VO2max (ml/kg-1.min-1)	0.56±096	0.01±055	0.022