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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