Sports Participation Promotes Beneficial Adaptations in the Erythrocyte Guanylate Nucleotide Pool in Male Athletes Aged 20-90 Years.

"all data are expressed as mean ? standard deviation (sd). table 1"

"Disclosure The authors declare no conflicts of interest in this work."

"National Science Centre in Poland funded this research (grant no. DEC-2013/09/B/NZ7/02556)."

"All testing procedures were performed in the LaBthletics Human Movement Laboratory of the Poznan University of Physical Education (Poznań, Poland). Each participant submitted his written consent to participate after he had been informed of the purpose and risks of the study, and the testing procedures. The protocols used in this study were approved by the Ethics Committee at the Karol Marcinkowski Poznan University of Medical Sciences and align with the Declaration of Helsinki. The study was registered in the clinical trials registry under the trial registration number: NCT05113914."