Table 4

Plasma (POsmol) and urine (UOsmol) osmolality, and UOsmol/POsmolratio of UER along MSUM competition
Stage 1 Stage 2 Stage 3 Stage 4 Stage 5
Pre Post Pre Post Pre Post Pre Post Pre Post
Plasma Osmolality (mOsmol/kg)
UER 281 (16) 287 (14)* 283 (16) 297 (17)* 272 (13) 291 (16)** 271 (12) 298 (10)** 283 (15) 296 (10)**
CON 287 (13) 276 (14) 270 (9)
SR 280 (18) 286 (17)* 282 (17) 294 (16)* 273 (15) 287 (16)** 270 (10) 298 (6)** 286 (13) 294 (10)*
FR 282 (12) 289 (9)* 285 (11) 302 (18)** 271 (9) 297 (14)** 273 (14) 299 (14)** 278 (17) 298 (11)**
Urine Osmolality (mOsmol/kg)
UER 535 (278) 811 (261)** 673 (311) 914 (367)** 792 (306)††b 997 (352)**† 750 (293)†† 898 (333)** 834 (343)†† 1050 (402)**††
CON 577 (197) 545 (78) 608 (349)
SR 514 (295) 840 (226)** 702 (326) 969 (393)** 849 (294)†† 1075 (356)**†† 770 (301)†† 939 (323)** 846 (355)†† 1086 (400)**††
FR 562 (256) 775 (298)** 636 (293) 844 (324)** 722 (311) 899 (326)**c 724 (285) 847 (344)** 818 (334) 1004 (406)**
Urine to Plasma Osmolality ratio
UER 2.0 (0.6) 2.7 (0.9)** 2.6 (1.0) 3.3 (1.1)** 3.3 (1.0)††bb 3.9 (1.2)††** 3.1 (1.0)†† 3.3 (1.0)** 3.5 (1.1)††bb 4.2 (1.3)††**
CON 2.0 (0.3) 2.0 (1.0) 2.2 (1.2)
SR 2.0 (0.7) 2.8 (0.9)** 2.8 (1.0) 3.7 (1.3)**cc 3.5 (0.9)†† 4.2 (1.1)††** 3.2 (1.0)†† 3.3 (1.0)** 3.6 (1.1)†† 4.4 (1.2)††**
FR 2.1 (0.6) 2.6 (0.9)** 2.1 (1.0) 2.8 (1.3)** 3.1 (1.0) 3.5 (1.1)** 3.1 (1.0) 3.3 (0.9)** 3.4 (1.3)†† 4.0 (1.5)††**
Individual UER response range (UOsmol/POsmol ratio)
0.6 to 2.9 0.9 to 4.0 0.4 to 4.6 0.5 to 6.1 1.3 to 4.8 1.6 to 6.1 1.1 to 4.7 1.1 to 5.0 0.9 to 5.4 1.1 to 6.6

Mean (SD): UER (UOsmon = 72, POsmoln = 28); Control (CON, n = 12); slow runners (SR; MSUM mean speed <8 km/h, UOsmon = 40, POsmoln = 17); fast runners (FR; MSUM mean speed ≥8 km/h, UOsmon = 32, POsmoln = 11). †† p < 0.01 and † p < 0.01 vs. Stage 1; **p < 0.01 and *p < 0.05 vs. pre-stage; bbp < 0.01 and bp < 0.05 vs. CON; ccp < 0.01 and cp < 0.05 vs. SR.

Costa et al.

Costa et al. Nutrition Journal 2013 12:13   doi:10.1186/1475-2891-12-13

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