Effects of Marathon Running on Aerobic Fitness and Performance in Recreational Runners One Week after a Race

Table 2

Changes in aerobic fitness before and seven days after a marathon race.

	PRE	POST	value	Mean difference; 90% CL	Effect size	Qualitative inference
O2 cost (ml/kg/km)	221.0 ± 14.9	221.2 ± 11.2	0.919	0.2; ±3.5	0.02	Unclear
%O2max at AT (%)	85.8 ± 4.7	85.3 ± 4.6	0.830	−0.5; ±4.1	−0.10	Unclear
O2max (ml/kg/min)	59.3 ± 9.5	58.1 ± 9.2	0.294	−1.2; ±2	−0.12	Possibly trivial
AT (km/h)	14.6 ± 2.6	14.4 ± 2.3	0.476	−0.2; ±0.49	−0.09	Likely trivial
Peak velocity (km/h)	17.2 ± 2.5	16.9 ± 2.5	0.082	−0.3; ±0.28	−0.09	Likely trivial