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. Author manuscript; available in PMC: 2015 Oct 1.
Published in final edited form as: Med Sci Sports Exerc. 2014 Oct;46(10):2007–2013. doi: 10.1249/MSS.0000000000000320

Table 2.

Metabolic responses before and after exercise under control and Ca supplementation conditions in experiment 2 (n = 23). Results are mean±SD or mean change (95% CI).

Condition Before After* Change (95% CI) p value
iCa, mg/dL Calcium 4.87 ± 0.26 4.68 ± 0.21 −0.19 (−0.26, −0.13) <.001
Control 4.87 ± 0.23 4.58 ± 0.16 −0.29 (−0.36, −0.21) <.001
Ca vs. Control −0.09 (−0.18, −0.01) 0.04
PTH, pg/mL Calcium 51.2 ± 17.1 79.4 ± 38.9 28.3 (14.9, 41.6) <.001
Control 55.0 ± 21.2 85.6 ± 34.5 30.58 (18.5, 42.6) <.001
Ca vs. Control 6.0 (−2.6, 14.5) 0.16
CTX, ng/mL Calcium 0.37 ± 0.16 0.42 ± 0.14 0.05 (0.01, 0.10) 0.02
Control 0.41 ± 0.22 0.47 ± 0.21 0.06 (0.02, 0.11) 0.007
Ca vs. Control 0.02 (−0.03, 0.07) 0.37
Hct, % Calcium 40.73 ± 6.39 42.73 ± 2.03 0.50 (−1.23, 2.23) 0.53
Control 41.74 ± 3.12 42.22 ± 2.66 0.80 (−0.20, 1.80) 0.10
Ca vs. Control 0.30 (−1.35, 1.95) 0.69

iCa, ionized calcium; PTH, parathyroid hormone; Hct; hematocrit; CTX, C-terminal telopeptides of type I collagen

*

samples were obtained immediately after exercise for iCa, PTH, and HCT and 30 minutes after exercise for CTX