title: Effect of acute potassium-magnesium aspartate supplementation on ammonia concentrations during and after resistance training.
abstract: This study examined the effects of aspartate supplementation (ASP) on plasma ammonia concentrations ([NH4+]) during and after a resistance training workout (RTW). Twelve male weight trainers were randomly administered ASP or vitamin C in a crossover, double blind protocol, each trial separated by 1 wk. ASP and vitamin C were given over a 2-hr period beginning 5 hr prior to the RTW. The RTW consisted of bench, incline, shoulder, and triceps presses, and biceps curls at 70% of one repetition maximum (1-RM). After the RTW a bench press test (BPT) to failure at 65% of 1-RM was used to assess performance. [NH4+] was determined preexercise, 20 and 40 min midworkout, immediately postexercise, and 15 min postexercise. Treatment-by-time ANOVAs, paired t tests, and contrast comparisons were used to identify mean differences. No significant differences were observed between treatments for [NH4+] or BPT. [NH4+] increased significantly from Pre to immediately postexercise for both the ASP and vitamin C trials. Acute ASP supplementation does not reduce [NH4+] during and after a high intensity RTW in weight trained subjects.
authors.affiliation: Department of Physical Education, Indiana State University, Terre Haute 47809, USA.
authors.forename: J L
authors.initials: JL
authors.lastname: Tuttle
authors.forename: J A
authors.initials: JA
authors.lastname: Potteiger
authors.forename: B W
authors.initials: BW
authors.lastname: Evans
authors.forename: J C
authors.initials: JC
authors.lastname: Ozmun
mesh_terms: D000293:Adolescent; D000328:Adult; D000641:Ammonia / Q000097:blood*; D000704:Analysis of Variance; D001205:Ascorbic Acid / Q000008:administration & dosage / Q000494:pharmacology; D018592:Cross-Over Studies; D004311:Double-Blind Method; D015444:Exercise / Q000502:physiology*; D005527:Food, Fortified; D006801:Humans; D007773:Lactates / Q000097:blood; D008297:Male; D011195:Potassium Magnesium Aspartate / Q000008:administration & dosage / Q000494:pharmacology*
chemical_list: D007773:Lactates; D000641:Ammonia; D011195:Potassium Magnesium Aspartate; D001205:Ascorbic Acid