ORIGINAL ARTICLE   

Gazzetta Medica Italiana Archivio per le Scienze Mediche 2018 June;177(6):271-6

DOI: 10.23736/S0393-3660.17.03662-2

Copyright © 2017 EDIZIONI MINERVA MEDICA

language: English

Effects of niacin on blood lactate postmaximal exercise

Kelly P. MASSEY ✉, Scott J. PHELTS, Kevin HUNT, Emily SIMONAVICE

School of Health and Human Performance, Georgia College & State University, Milledgeville, GA, USA

BACKGROUND: The purpose of this study was to examine the effects of pre-workout supplementation of flush-free niacin, inositol hexanicotinate (IHN), on blood lactate measurements post exercise.
METHODS: Using a random crossover design, 13 participants completed a supramaximal exercise cycle protocol. Participants fasted for 12 hours and arrived one hour before testing. Participants were randomly assigned to ingest 2000 mg of IHN prior to one of the two testing trials. Participants performed two Wingate cycle tests during each session. Blood samples were taken at rest and post exercise at two minute intervals. All samples were analyzed with the YSI 1500 Sport Lactate Analyzer and levels recorded. After 72 hours of recovery, participants returned to the lab to complete the remaining trial. The same fasting protocol was followed prior to the second test.
RESULTS: Lactate levels were not significantly different between tests at any measured time point (P>0.05). Larger peak power was observed in the treatment (T) group however the difference was not significant (C: 971.6±192.37, T: 985.2±218.19 Watts, P>0.05). A stronger correlation was seen between peak power and rate of fatigue in the control (C) group (C: r =0.855, T: r =0.758 Watts/sec, P<0.05) compared to the T group.
CONCLUSIONS: An acute supplementation of IHN prior to exercise does not seem to significantly alter peak power or lactate accumulations from supramaximal cycle exercise in a normal healthy population.

KEY WORDS: Dietary supplements - Inositol niacinate - Exercise