Dr. Luis Rodriguez Castellano
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Masters Thesis Project
Project type
Thesis: Effects of an Alkalizing Supplement on Power, Anaerobic Capacity and Blood Lactate during Short-Term Maximal Exercise
Date
May 2016
Location
University of Puerto Rico, Río Piedras Campus & Medical Science Campus
San Juan, Puerto Rico
Donation
Supplements donated by pH Science Holdings, Inc. (Lynnwood, WA, USA)
Authors
Dr. Luis Rodríguez-Castellano, Dr. Lucía del R. Martínez, Carmen Nevárez (MS, RD), Dr. Víctor Bonilla.
Traditional non-nutritional alkalinizing supplements, such as NaHCO3- and Na-CIT, have shown improvements in buffering capacity among athletes in anaerobic events. However, the effects of a mineral-based alkalinizing nutritional supplement (ANS) on maximal buffering capacity on a short-term maximal anaerobic test are unknown. PURPOSE: To determine the effects of an ANS on peak power (PP), anaerobic capacity (Mean Power [MP]) and blood lactate (BLac-) during a short-term maximal exercise bout. METHODS: Twenty three cyclists or tri-athletes (7 females and 16 males; 38.2 ± 10.6 years of age) participated in a double blind placebo-control study. They were matched for MP and assigned to ANS treatment (ANS) or placebo (PLA) group. Subjects visited the lab for a familiarization, pre, and posttest sessions. A 7-day supplementation of 1 tablet/11.4kg of body weight of either ANS (225mg of Ca+2, 36mg of K+, 1mg of Mg+2) or PLA (maltodextrin) was administered between tests. Testing consisted of a 30 second Wingate Anaerobic Test (WAnT-30s) to determine PP, MP, Fatigue Index (FI) and Total Work (TW). BLac- was measured at rest (BLac-R), immediately after (BLac-P0’) and 5 minutes after (BLac-P5’) the WAnT-30s. Independent T-tests were used to compare between group’s PP, MP, FI and TW. Repeated measures two-factor MANOVA was used to compare BLac-. RESULTS: There were no differences between ANS and PLA in PP (916.2 ± 222.6 vs. 856.0 ± 220.2 W, p= 0.52), MP (586.6 ± 124.5 vs. 530.6 ± 131.5 W, p= 0.31), FI (55.7 ± 8.0 vs. 57.8 ± 9.2 %, p= 0.57), and TW (956.0 ± 202.4 vs. 865.1 ± 213.3 kg.m, p= 0.31). BLac-R (1.14 ± 0.35 vs. 1.26 ± 0.54 mMol/L) increased at P0’ (8.61 ± 2.98 vs. 8.85 ± 4.27 mMol/L) and P5’ (11.95 ± 2.82 vs. 11.47 ± 3.56 mMol/L, p<0.001) in both ANS and PLA, respectively, with no between group difference (p=0.97). CONCLUSION: A 7-day supplementation with ANS had no effect on PP, anaerobic capacity or BLac-. These results suggest that maximal buffering capacity is not affected with mineral-based alkalinizing supplements during a single bout of very short maximal exercise.
