Posts

Showing posts with the label O2

Popular topics

Show more

Arginine Supplementation For Endurance and Intensity

Written by | published on
Image
A few days ago, my collegues from the Dutch version of Ergo-Log reported on an older study (Esporte. 2007) which showed improvements in strength in a group of subjects supplemented with 3g of arginine per day. Now, a more recent study by Bailey et al. (Bailey. 2010) investigated the effect of 6g arginine mixed in a beverage that was consumed 1 hour before the completion of "a series of 'step' moderate-intensity and severe-intensity exercise bouts". The scientists found that... Figure 1: Chemical structure of l-Arginine ( HMBD v2.5 ) Plasma [nitrite] was significantly greater following L-arginine consumption compared to placebo (ARG: 331 ± 198 vs. PLA: 159 ± 102 nM; P<0.05) and systolic blood pressure was significantly reduced (ARG: 123 ± 3 vs. PLA: 131 ± 5 mmHg; P<0.01). The steady-state VO2 during moderate-intensity exercise was reduced by 7% in the ARG condition (ARG: 1.48 ± 0.12 vs. PLA: 1.59 ± 0.14 L /min; P<0.05). During severe-intensity exercise,...
Read full article »

Nitrate Supplementation Lowers Blood Pressure and Exercise O2 Costs

Written by | published on
The hype around creatine and amino acid nitrates already calmed down. For many costumers (me included) real world results could not keep up with the promises made in glossy adverts. A recent study by Vanhatalo et al. (Vanhatalo. 2010 ) does yet show that nitrate supplementation can in fact influence physical responses to endurance exercise: The exercise protocol (two moderate-intensity step tests followed by a ramp test) was repeated 2.5 hours following first ingestion (0.5 L) and after 5 and 15 days of BR and PL. Plasma [nitrite](Baseline: 454 ± 81 nM) was significantly elevated (+39% at 2.5 h post; +25% at 5 days; +46% at 15 days; P<0.05) and systolic and diastolic blood pressure (baseline: 127 ± 6 and 72 ± 5 mmHg, respectively) were reduced by ~4% throughout the BR supplementation period (P<0.05). Compared to PL, the steady-state O2 during moderate exercise was reduced by ~4% after 2.5 hours and remained similarly reduced after 5 and 15 days of BR (P<0.05). [...] Thes...
Read full article »
Disclaimer:The information provided on this website is for informational purposes only. It is by no means intended as professional medical advice. Do not use any of the agents or freely available dietary supplements mentioned on this website without further consultation with your medical practitioner.