How would you like to increase endurance in your fitness training by 20% as a result of following one simple sports 
nutrition tip? Of course you would!
A recent study conducted at the University of Exeter, and published in the Journal of Applied Physiology reveals one simple way of boosting your fitness endurance while exercising, or racing at a high intensity. It all comes down to boosting the nitric oxide (NO2) in your body which helps the blood vessels relax. The special nutrition catalyst for this – L-Arginine, an amino acid.
The study looked at 9 healthy college aged men, and divided them into two groups. One group was the placebo sample, and given a black currant drink, while the other group was given a 500 ml drink which contained 6g of L-Arginine. The drink is known as ARK 1 from Arkworld International Labs.
The results of the study showed that the L-Arginine group was able to exercise 20% longer, and had 1%-2% increase in race times. The bottom line is the consumed L-Arginine was transformed into (nitric oxide) NO2 which helped to relax the blood vessels. The result of a higher levels of NO2 in the body, which in turn relaxed the blood vessels, led to the following:
1. Improvement in severe intensity exercise endurance by 20%
2. Significant reduction in systolic blood pressure
3. The reduction in the oxygen (O2) cost of exercise.
Other studies over the years have shown that drinking beetroot juice can also enhance nitric oxide levels leading to an improvement in exercise endurance.
There is also a link between increased nitric oxide, and a decrease in erectile dysfunction.
This study look promising enough for me to consider L-Arginine supplementation to increase endurance. However, I would like to see a larger study completed, and include women in that study. L-Arginine supplementation does look promising I must say.
Click here for a link to the studies abstract.
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Go ahead, and comment below. What do you think of this study? Do you think you can increase endurance by supplementing with L-Arginine? Your opinion counts. We would love to hear. Sound off by posting a comment below.
I power-walk 2.25 miles every day (and have been doing so for years). I started taking L-Arginine daily. After a month or two, I noticed I could maintain my beginning pace all the way to the end, whereas before, I would slow down ever-s0-slightly about 2/3 of the way through. I also noticed my breathing was easier. I was trying to figure out why this was occuring and then remembered that I had started taking L-Arginine. I figured this must have been the reason, as nothing else really changed for me. I was amazed at how noticeable the change was.