Table 2. Blood metabolites.

		Intervention group			Control group
Blood
variable	Test	Pre	Post	n	Pre	Post	n
pH	3rd 200 m	7.39±0.04	7.40±0.04	15	7.39±0.04	7.39±0.03	16
pH	5th 200 m	7.23±0.06	7.22±0.07	15	7.20±0.09	7.20±0.07	17
ΔpH	3rd → 5th	0.17±0.05	0.18±0.06	15	0.19±0.07	0.19±0.06	16
ΔLactate	3rd → 5th	7.8±2.7 mM	7.2±2.6 mM	15	8.2±2.6 mM	8.3±2.6 mM	17
K+	3rd 200 m	4.78±0.35 mM	4.74±0.44 mM	15	4.69±0.23 mM	4.66±0.36 mM	16
K+	5th 200 m	5.15±0.53 mM	5.01±0.61 mM	15	5.09±0.88 mM	4.95±0.56 mM	17
ΔK+	3rd → 5th	0.43±0.54 mM	0.27±0.67 mM	15	0.38±0.85 mM	0.34±0.56 mM	16

Blood variables obtained from a fingertip sample after the 3^rd and 5^th of five 200 m swims performed at increasing speeds before and after a 12 week intervention period. The third 200 meter was swum on a identical speed before and after the intervention whereas the fifth 200 meter was swum with maximal effort.