Table 1. Biochemical bone markers before and after the fatiguing exercise and reference values obtained from literature (Szulc et al., 2001). Bone marker values were adjusted with plasma volume changes. Data are mean (±standard deviation).
P1NP [ng·ml-1] CTx [ng·ml-1] P1NP/CTx [ratio]
Reference value 74 (29) (Szulc et al., 2001) .6 (.2) (Szulc et al., 2001)§ 123 (45) (calculated from (Szulc et al., 2001) D calculatedas the RMS of relative SDs)
Baseline 78 (47) .51 (.23) 157 (54)
After 85 (50) .42 (.16) 197(69)
2 hours 78 (45) .42 (.19) 190 (55)
Day 1 86 (46) .59 (.31) 166 (79)
Day 2 85 (54) .67 (.36)* 145 (71)
* signifies significant difference from baseline, p ≤ 0.05. P1NP = procollagen type I amino terminal propeptide, CTx = carboxyterminal crosslinked telopeptide.
§ Szulc et al. (2001) reported CTx results in mmol·L. The units have been converted to ng·mlwith the following equation taken from (Crofton et al., 2002):(ng·L) = (pmol·L) · 138]/7.75.