ONLINE DRIVERS MEDIA

Marathon de Sable ? Tomato juice

Its about time for another quickie, a news quickie about exercise & supplementation, about vitamin D and tomato juice... actually its rather about tomato juice, a special carbohydrate + protein bar and the notorious "Gatorate(R)-ish" carbohydrate supplement every endurance athlete believes he must be taking. But lets be honest, who cares about tomato juice, carbohydrate, protein bars, pseudo Gatorade and their individual and joint effects on the health and performance of constantly (over-)taxed ultra-marathoners, if the other new item in todays article deals with the potential beneficial effect of vitamin D on IGF-1 and its anabolic consequences?
You care? Ok, in that case, you may be inclined to hear that the bar contained 30.20 g (19.7 g sugars) carbohydrates, 5.2g fiber, a surprisingly high amount of fat (15.6g) and. of course, protein 30.8g to be precise (14.3 g whey protein). If we add the energy content of carbs, fats and protein up, we get an energy content of ~400kcal for the bar and thus approx 24x more than in 100ml of the tomato juice, which is - as you can see in Table 1 more or less devoid of "nutrients", but packed with antioxidants.

Table 1: Average nutritional value per 100 g of tomato juice and protein bar used in the present study (canned, salt added) and the carbohydrate supplementation beverage, as provided by the manufacturer (Samaras. 2014)

As you can see in Figure 1, enough antioxidants to elicit significant increases in flow-mediated dilatation, which was used as an estimate of endothelial function, by the researchers from the  General Hospital of Giannitsa in Greece.

Figure 1: Changes (% pre) in response to tomato juice & protein bar supplementation (Samaras. 2014)

Interestingly, the thiobarbituric-acid reactive substances, and protein carbonyls were significantly decreased in both supplementation groups - a good indicator that these changes were not mediated by the red night-shade elixir, but rather by the protein + carbohydrate bar, which lead to a "whey-typical" increase in reduced glutathione.

Is the vitamin D you produce at the beach youre visiting only rarely the secret to perfect glucose control? Learn more in the "Beyond Carbohydrate Series"

If the marathoners had now had low vitamin D levels, they may even had gained some muscle, if they had followed a similar protocol as the subjects in another recently published study from the St. John Fisher College Rochester NY.

And the results of this study dont even seem completely nonsensical. As a SuppVersity reader you do after all know about the existing evidence of the negative effects low vitamin D levels will have on the function and strength of skeletal muscle ("low" in this context means less than 30ng 25-OHD on the lab report). Against that background, it does after all appear to be logical that refilling the levels would in one way or another help maintain or even build skeletal muscle.

The actual news here is yet not that vitamin D could potentially prevent muscle atrophy and increase hypertrophy. Its rather that these effects could be brought about by the significant increases in total IGF-1, as well as the IGF-1 binding proteins 1 + 3 researchers from the College of Rochester observed, when they added 4,000 IU of vitamin D to the diets of 6 vitamin D insufficient and deficient men (39.0±8.6yo with 25OH D 20.0±7.7ng/mL) who participated in a one-hour exercise program consisting of stretching (ST), aerobic (AB), and resistive (RT) exercises (Darr. 2014)

Suggested Read: "Underestimated Vitamin D Sources: Especially Eggs, But Also Chicken, Pork, Fish & Dairy Contain an Overlooked, Physiologically Relevant Amount of Ready-Made 25OHD" | more

The aerobic training was a intensity treadmill walk, which was rotated with a moderate strength (50% 1-RM, 15, 10 repetitions) full body workout consisting of squats, bench presses, leg presses, and lat pull downs. As previously said, the scientists found that the vitamin D binding protein 3 levels (BP3) were increased after the resistance training in the vitamin D (n=6) vs. placebo (n=7) group (30%). And while the total IGF-1 levels decrease in the placebeo group, the increase in various binding proteins buffered this effect in the vitamin D group. Similar, yet less pronounced effects were observed in response to the aerobic training.

Whether the scientists assumption that the increases in BP3 and BP1 levels and the maintenance of the total IGF-1 levels "potentially alter [...] the IGF system for enhanced muscle health" is accurate, let alone practically relevant is something this study cannot actually confirm.

And lets be honest, is it even likely? For someone without a pre-existing vitamin D deficiency? No. For someone with similarly low vitamin D levels as the deficient and insufficient subjects in a 2011 study by Stockton et al. (2011)? Probably, yes - but are you actually D-ficient?
References:

• Ceglia, Lisa, et al. "Effects of alkali supplementation and vitamin D insufficiency on rat skeletal muscle." Endocrine 44.2 (2013): 454-464.
• Darr, Rachel, et al. "Vitamin D supplementation effects on the IGF system in men after acute exercise (828.15)." The FASEB Journal 28.1 Supplement (2014): 828-15.
• Samaras, Antonios, et al. "Effect of a special carbohydrate-protein bar and tomato juice supplementation on oxidative stress markers and vascular endothelial dynamics in ultra-marathon runners." Food and Chemical Toxicology (2014).
• Stockton, K. A., et al. "Effect of vitamin D supplementation on muscle strength: a systematic review and meta-analysis." Osteoporosis international 22.3 (2011): 859-871.

Dont obsess about "optimal" supplement regimen, start training, eating, sleeping and exercise the patience it takes to reverse years of sedentary pizza eating.

I thought it would be nice to take a closer look at some of the news I would otherwise "waste" in form of a three-liner in the SuppVersity Facebook News and decided that it was about time for yet another "news quickie" on exercise supplementation and exercise & supplementation ;-)

For todays installment of these "Short News", Ive selected a study that discusses the impressive effects of a "gout drug" on exercise induced muscle damage and a study that takes another look at the ever-so-popular issue of "optimal" protein supplementation - an issue some of you are investing so much energy in that it is no wonder that theyre not making the gains they would want to.

• Interesting observation: Xanthine oxidase inhibitor Allopurinol, which is usually used to treat conditions that are cause by increased uric acid levels (e.g. gout), dampens exercise induced muscle damage in trained individuals.
  
  The results of a recent study from the University of Valencia clearly demonstrate that the use of 300 mg of allopurinol 4h before a soccer match, lead to significant reductions in all measured markers of muscle damage in those six out of twelve professional soccer players who had been randomized to the active arm of the study (Sanshis Gomar. 2014).

  Figure 1: Changes in markers of muscle, heart and liver damage, as well as MDA levels, amarker of lipid oxidation due to soccer match with our without xanthine oxidase inhibitor (Sanshis Gomar. 2014)

  Now, unfortunately, a reduction in muscle damage that is facilitated by the inhibition of an enzyme that generates reactive oxygen species is - as you should by now have learnt from the dozens of posts on hormesis and the beneficial effects of exercise induced increases in reactive oxygen specie, not exactly desirable.
  
  The authors conclusion that their observation was a great thing and could be used by athletes all around the world is thus probably only valid with respect to in professional soccer players and other elite athletes who are trying to avoid overuse injuries... and even for their health blunting the ROS response to exercise permanently probably isnt going to be exactly conducive to their health.
• Further evidence for the superiority of protein blends (vs. single sources as whey) for muscle building
  
  Scientists from the University of Texas Medical Branch, the Texas A&M University, the Arizona State University and the University of Utah found that a blend of soy and dairy protein slightly prolonged net amino acid balance across the leg as compared to whey protein alone, when it was ingested right after a workout.

• In the soon-to-be-published paper, to which I do unfortunately not have access, the scientists emphasize that it is not the fractional protein synthesis rate or the mRNA expression of selected amino acid transporters (LAT1/SLC7A5, CD98/SLC3A2 SNAT2/SLC38A2, PAT1/SLC36A1, CAT1/SLC7A1) which made the difference, but rather the fact hat "the ingestion of the protein blend resulted in a prolonged and positive net phenylalanine balance during post-exercise recovery as compared to whey protein" (Reidy. 2014).
  
  Now, eventually this is no news. I wrote about a similar phenomenon with whey protein only recently (learn more) and some of the researchers who were part of the study at hand have actually presented very similar results (albeit from a rodent study) in the August edition of Clinical Nutrition last year.
  

  Figure 2: Fractional protein synthesis 0-270min after the ingestion of pure whey or soy isolate of blends containing soy, whey and caseinate in the given ratios (Butteiger. 2013)

  In this study Butteiger et al. observed that a mixture of 1:1:2 of soy protein, whey protein and caseinate (="broken" micelar casein which has a significantly faster digestion rate than the original) produced the maximal increase in protein synthesis (dotted line in Figure 1), but with "fake casein" and soy, I am 100% sure that you can do better than that with whey hydrolysate, whey concentrate and micellar casein (1:1:1 would mean an identical ratio of the three). As far as the ratios goes, I would suggest the following combinations for specific purposes:
  
  • 5:5:1 - immediately post workout, if you have a meal within the next 1h
  • 1:1:1 - immediately post workout, if you have a meal within the next 2h
  • 1:3:5 - as a snack, of if you dont have a meal within 4h of the workout
  Please keep in mind, though that I have no scientific evidence to confirm that this would be "optimal" - its just what I would say appears logical based on the current evidence we have. Instead of whey hydrolysate you can also replace this and the whey concentrate by an isolate. So that you would end up at whey isolate : micellar casein ratios of 10:1, 2:1 and 4:5 - got that?

References:

• Butteiger, D. N., et al. "A soy, whey and caseinate blend extends postprandial skeletal muscle protein synthesis in rats." Clinical Nutrition 32.4 (2013): 585-591.
• Reidy, et al. "Soy-Dairy Protein Blend and Whey Protein Ingestion After Resistance Exercise Increases Amino Acid Transport and Transporter Expression in Human Skeletal Muscle." Journal of Applied Physiology April 3, 2014 jap.01093.2013 
• Sanchis?Gomar, F., et al. "Allopurinol prevents cardiac and skeletal muscle damage in professional soccer players." Scandinavian Journal of Medicine & Science in Sports (2014).