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Table 2.

Muscle enzyme activity in vastus lateralis and triceps brachii before and after crossing the Greenland icecap on cross-country skis

Arm
Leg
BeforeAfterBeforeAfter
CS activity (μmol g-1 min-125±5 26±2  39±2 28±5 *(3 of 3) 
HAD activity (μmol g-1 min-117±3 18±1  31±3 22±6 *(2 of 3) 
PFK activity (μmol g-1 min-1190±31 136±56 *(3 of 3) 164±8 95±40 *(3 of 3) 
HSL activity (μmol g-1 min-11.03±0.37 0.39±0.08  0.32±0.06 0.32±0.07  
LDH activity (μmol g-1 min-1860±126 680±98  470±90 370±118  
H-LDH (%) 15±4 22±3  47±9 63±2 *(3 of 3) 
M-LDH (%) 85±4 78±3  53±9 37±2 *(3 of 3) 
Arm
Leg
BeforeAfterBeforeAfter
CS activity (μmol g-1 min-125±5 26±2  39±2 28±5 *(3 of 3) 
HAD activity (μmol g-1 min-117±3 18±1  31±3 22±6 *(2 of 3) 
PFK activity (μmol g-1 min-1190±31 136±56 *(3 of 3) 164±8 95±40 *(3 of 3) 
HSL activity (μmol g-1 min-11.03±0.37 0.39±0.08  0.32±0.06 0.32±0.07  
LDH activity (μmol g-1 min-1860±126 680±98  470±90 370±118  
H-LDH (%) 15±4 22±3  47±9 63±2 *(3 of 3) 
M-LDH (%) 85±4 78±3  53±9 37±2 *(3 of 3) 

Abbreviations: CS, citrate synthase; HAD,β-hydroxy-acyl-CoA-dehydrogenase; PFK, phospho-fructo-kinase; HSL,hormone-sensitive lipase; LDH, lactate dehydrogenase; H-LDH,heart-type-specific LDH; M-LDH, muscle-type-specific LDH.

Values are means ± S.E.M. N=3.

*

Number of subjects in which the change is observed, compared with the pre-test, followed by the total number of subjects.

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