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Table 3 Phenyalanine and Tyrosine Kinetics

From: Aerobic fitness does not modulate protein metabolism in response to increased exercise: a controlled trial

 

LOW-FIT (n = 5)

FIT (n = 6)

 

BL

(D4)

EX1

(D7)

EX2

(D11)

BL

(D4)

EX1

(D7)

EX2

(D11)

P-values (Group × Time Effect)

Qp

(umol·kgFFM-1·h-1)a

51.6 ± 7.0

48.7 ± 3.1

50.0 ± 6.2

55.2 ± 7.1

55.4 ± 3.9

54.7 ± 8.0

0.73

Qpt

(umol·kgFFM-1·h-1)b

7.6 ± 1.9

6.2 ± 1.6

5.9 ± 1.7

6.0 ± 2.1

4.9 ± 2.6

4.8 ± 1.4

0.97

Qp - Qpt

(umol·kgFFM-1·h-1)c

44.1 ± 6.3

42.4 ± 2.6

44.1 ± 5.7

49.3 ± 6.1

50.5 ± 4.3

49.9 ± 7.6

0.62

(Qp - Qpt) - Qp

(umol·kgFFM-1·h-1)d

-7.5 ± 1.9

-6.3 ± 1.6

-5.9 ± 1.7

-6.0 ± 2.1

-4.9 ± 2.6

-4.8 ± 1.4

0.29

  1. a whole-body protein breakdown
  2. b net protein oxidation (conversion rate from phenylalanine to tyrosine)
  3. c whole-body protein synthesis
  4. d net protein balance