Table 3. Changes from test 1 to test 2 in membrane factor for CO (Dm), lung capillary blood volume (Vc), nitric oxide lung transfer (TL), carbon monoxide lung transfer (TL) and lung volume (VA) at rest and during exercise in Players and Control children. Data are mean ± standard deviation (SD).
Players Children Control Children
test 1 test 2 test 1 test 2
Rest Exercise Rest Exercise Rest Exercise Rest Exercise
DmCO 44.1 50.1 † # 48.0 * 53.2 *† # 42.7 49.5 †  43.5 * 47.4 *† 
(ml·min-1·mmHg-1) (5.2) (6.7) (9.2) (11.7) (6.5) (9.7) (9.7) (13.8)
Vc (ml) 50 # 53 †  44 # 56 *†  49 55 †  46 66 *† 
(4) (10) (9) (11) (3) (6) (12) (17)
TLNO 87 # 99 95 *# 105 * 84 98 86 * 94 *
(ml·min-1·mmHg-1) (5) (10) (18) (23) (5) (7) (19) (27)
TLCO 15.5 16.7 # 16.3 20.0 *# 16.2 17.0 16.7 20.9 *
(ml·min-1· mmHg-1) (3.7) (4.5) (2.8) (3.3) (1.2) (3.2) (3.9) (4.6)
VA 3.0 # 3.3 † # 3.4 # 3.7 *† # 3.1 # 3.4 † # 3.5 # 3.9 *† #
(L) (.5) (.8) (.6) (.7) (.4) (.7) (.8) (.8)
* denote significant (p ≤ 0.05) difference between both groups in same test, between rest and exercise in the same group, and between test 1 and test 2, respectively.
†  denote significant (p ≤ 0.05) difference between both groups in same test, between rest and exercise in the same group, and between test 1 and test 2, respectively.
# denote significant (p ≤ 0.05) difference between both groups in same test, between rest and exercise in the same group, and between test 1 and test 2, respectively.