Table 2 Concentration of erythrocyte adenylate pool of endurance runners (EN; n = 86), sprinters (SP; n = 58), and controls (CO; n = 62).

From: Life-long sports engagement enhances adult erythrocyte adenylate energetics

Variable (µmol/L RBC)

EN

SP

CO

p

Effect size (η2)

ATPrest

1736.3 ± 98.8†,‡

1779.0 ± 97.1#,‡

1647.1 ± 85.8#,†

< 0.001*

0.234

ADPrest

215.2 ± 23.4†,‡

240.8 ± 26.6#

243.5 ± 23.7#

< 0.001*

0.232

AMPrest

22.0 ± 4.3‡

20.64 ± 4.0‡

26.8 ± 4.3#,†

< 0.001*

0.269

TANrest

1973.4 ± 96.2†,‡

2040.4 ± 83.5#,‡

1917.4 ± 77.5#,†

< 0.001*

0.227

AECrest

0.934 ± 0.01‡

0.931 ± 0.01‡

0.922 ± 0.01#,†

< 0.001*

0.239

ATP/ADPrest

8.2 ± 1.0†,‡

7.5 ± 1.0#,‡

6.8 ± 0.9#,†

< 0.001*

0.251

ADP/AMPrest

10.0 ± 1.5†,‡

11.9 ± 1.4#,‡

9.2 ± 1.4#,†

< 0.001*

0.350

  1. Data are given as means ± SD. *Significant between-group differences as indicated by one-way ANOVA (p < 0.05); †Significantly different from sprint-trained athletes. ‡Significantly different from untrained controls. #Significantly different from endurance-trained athletes.
  2. ATP adenosine-5′-triphosphate, ADP adenosine-5′-diphosphate, AMP adenosine-5′-monophosphate, TAN total adenine nucleotides, AEC adenylate energy charge, ATP/ADP adenosine-5′-triphosphate/adenosine-5′-diphosphate ratio, ADP/AMP adenosine-5′-diphosphate/ adenosine-5′-monophosphate ratio. TAN (total adenine nucleotides) was calculated from following formula: TAN = [ATP] + [ADP] + [AMP], AEC (adenylate energy charge) was evaluated according to the formula by Atkinson AEC = ([ATP] + 0.5[ADP])/([ATP] + [ADP] + [AMP]), rest resting value.
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