Studies related to Power Output and L-Tyrosine

Effects of tyrosine supplementation ration on anaerobic sports capacity and plasma catecholamine levels in soccer athletes
Effect None
Values Wingate. Peak power (w). Mean and SEM. Placebo: before 854.67 ± 40.22, after 911.52 ± 42.15. Tyrosine: before 942.25 ± 35.79, after 936.87 ± 42.55. Power drop. Placebo: before 542.09 ± 31.30, after 685.63 ± 43.96. Tyrosine: before 695.33 ± 50.00, after 703.71 ± 37.03. Mean power. Placebo: before 528.34 ± 16.61, after 531.21 ± 17.46. Tyrosine: before 547.21 ± 19.94, after 533.61 ± 18.31.
Trial Design randomized
Trial Length 12weeks
Number of Subjects 14
Sex m
Notes for this study:
In this randomized, single-blind crossover trial, 14 soccer players took 2 g of tyrosine daily or placebo for 2 weeks before crossing over. On a Wingate cycling test, tyrosine failed to produce improvements in peak power, power maintenance, and mean power. Were wasn't a statistically significant difference in heart rate, lactic acid, blood glucose, noradrenaline, or dopamine. Epinephrine was reduced more when taking tyrosine for those who took it first but not those who took it second.
Funding issues for this study:
Not declared.

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