Changes in Biochemical, Strength, Flexibility, and Aerobic Capacity Parameters after a 1700 km Ultraendurance Cycling Race

Table 1

Pre and post mean and SD values of the studied biochemical variables.

Parameter	Unit	Samples		% change			Cohen’
		Prerace	Postrace
Urea	mg/dL	32.3 ± 7.3	29.5 ± 2.0	−8.6	−.674	.500	−0.38
Creatinine	mg/dL	1.1 ± 0.2	1.1 ± 0.2	0	−.674	.500	0.00
Sodium	mmol/L	144.0 ± 0.8	143.3 ± 2.1	−0.5	−.816	.414	−0.87
Potassium	mmol/L	4.5 ± 0.2	4.5 ± 0.1	−1.1	−.447	.655	0.00
Chloride	mmol/L	106.3 ± 1.0	106.5 ± 1.3	0.2	−.272	.785	0.20
LDH	UI/L	424.8 ± 36.3	411.8 ± 47.3	−3.1	−.730	.465	−0.36
CK	UI/L	81.0 ± 23.3	82.3 ± 32.8	1.5	−.674	.500	0.06
Iron	μg/dL	132.0 ± 27.4	172.8 ± 60.6	30.9	−1.461	.144	1.49
Ammonium	μmol/L	62.4 ± 17.1	78.0 ± 13.3	25.0	−1.095	.273	0.91
Testosterone	ng/L	4.2 ± 2.5	3.9 ± 2.6	−6.5	.000	1.000	−0.12
Cortisol	μg/dL	14.3 ± 2.3	14.6 ± 0.6	2.5	−.674	.500	0.13
Transferrin	mg/dL	188.8 ± 7.3	204.5 ± 17.1	8.3	−.674	.500	2.15
Hemoglobin	mg/dL	167.8 ± 9.5	141.6 ± 15.7	−15.6*	−2.023	.043	−2.76
Triglycerides	mg/dL	86.2 ± 9.1	127.0 ± 32.2	70.5	−1.753	.080	4.51
Creatinine clearance	mL/min	143.3 ± 17.3	128.0 ± 28.8	−10.7	−.674	.500	−0.87
Lactate	mmol/L	2.3 ± 0.6	2.2 ± 0.3	−3.5	.000	1.000	−0.17

versus prerace sample. Ck: creatinine kinase; LDH: lactate dehydrogenase.