Can Juicing enhance performance?

As I write this, its exactly 1 day and 15 hours until the start of the London Marathon and I have just broken one of the golden rules - don't try anything new in race week.

What I've done isn't exactly heinous and I have done so under good authority (my colleague the multi marathon smashing and cyclist extraordinaire) but none-the-less i'm a little nervous.

I have just consumed my first beetroot juice.

Numerous studies have linked the consumption of Beetroot juice to increased stamina and speed, which I simply couldn't resist ahead of Sunday's marathon. Beetroots are high in nitrate, which when ingested is converted into nitrite then nitric acid.

Nitric acid has two effects on the body, firstly it causes blood vessels to dilate so you can provide more blood through them. Secondly, it makes the mitochondria (the powerhouses of cells) more efficient so they create the same amount of energy whilst consuming less oxygen. These basically means you are producing more oxygen but utilizing it more efficiently which can only lead to good things!

So to make my juice I juiced a whole cooked beetroot with an apple and Satsuma and a little water. The taste was ok - very beetrooty. Luckily i'm a fan of the taste to it works for me. The maximum effects as described above take place between 2 and 2.5 hours from consumption, so assuming I don't experience any untoward effects, I will have another with my breakfast on Sunday morning and hopefully reap the rewards and hit my goal of a 3:30 finish!

My nerves are slowly turning to excitement and i'm feeling pretty pumped right now. Bring. It. On.

Carb Loading 101

With the London Marathon just 4 days away, the running side of training is done (I actually have just one easy 10 minute left!) all efforts now need to be concentrated on fueling. As I have been tapering for around a week already, my muscles are already starting to refill with Glycogen following the months of constant depletion from long, intense training. Physically I can feel this, especially over the last few days when during my last runs I have felt heavy! I have to keep reminding myself this is a good thing as fuel is what's going to get me round the course.

Carb loading is a term used frequently in running and endurance circles but what does it actually mean? Put simply, it the process of increasing the amount of calories you consume from Carbohydrates in order to maximize the amount of Glycogen in your muscles. This is essential in endurance events as Glycogen will be your main fuel source and is most efficiently converted into energy. Once depleted, you will be forced to burn fat and finally muscle which won't provide the same amount of energy and is slower to metabolise meaning you will find activity much more challenging despite levels of fitness.

Historically, it was advised to completely deplete Glycogen stores by consuming a low carb diet for around 4 days, then switching to high carbs to refill. Thankfully, more modern research has demonstrated there is no need to empty first (which is a great thing for all us Carb lovers!)

So how much Carbohydrate actually constitutes loading - well, it varies from person to person but typically you should aim for 4 grams of Carbs for each KG of body weight. So, if you weigh 60 kg  then you would need 240g. Each gram of carbohydrate is 4 calories (on average) so this is a total of 960 calories. You can start loading from 5 days out - I personally plan to start tomorrow as my diet is already pretty carb heavy. Try to distribute your intake evenly throughout the day and by meal to get the most from your diet.

You can get some level of Carbs from pretty much every food group out there (meat and fish being the exception for the most part) however the volume and quality varies dramatically. Below I have rounded up the highest carb containing foods by group, along with their volumes for reference. By focusing on these foods, you can ensure you're able to hit the needed intake amounts as focusing on lesser carb heavy foods, you will become full before hitting the requirement.

Fruit	Measure	Carb content in Grams
Blueberries	1/2 cup	25
Banana	1 Whole	27
Mango	1 Whole	31
Papaya	1 Whole	33
Pear	1 Whole	26
Vegetables	Measure	Carb content in Grams
Sweetcorn	1 cup	44
Potato	1 Whole	43
Sweet Potato	1 Whole	28
Grains	Measure	Carb content in Grams
Bagel	1 Whole	35 - 50
Bread	2 Slice's	25
Bulgar	1 Cup	34
Cous Cous	1 cup	36
Croissant	1 Whole	26
English Muffin	1 Whole	25
Muffin	1 Whole	29 - 28
Noodles	1 Cup	40
Pita	1 Whole	33
Rice	1 cup	44
Spaghetti	1 cup	40
Beans	Measure	Carb content in Grams
Baked Beans	1/2 Cup	24
Misc	Measure	Carb content in Grams
Frozen Yogurt	1 Cup	36
Cake	1 piece	34 - 50
Brownie	1 piece	36

Note that I whilst have included some desserts, the Carbs here come pretty much entirely from sugar which will be expended much quicker than those in whole foods. However, given what we're about to undertake, a little indulgence is as good for the body as it is for the mind!

Good luck to everyone running London or any other race this weekend - remember, all the hard work has already been done so relax, smile and enjoy!

Feeling fruity

There are so many health benefits of Oranges you would be crazy to not be eating them. I eat at least one pretty much every day and when i'm feeling run down up this even more as they contain so much goodness.

Starting with the obvious, they are jam packed with Vitamin C which helps to boost immunity thanks to its role in protecting the body from free radicals. When you exercise frequently at high intensity you are more risk from free radicals because of the stress this induces. Antioxidants fight off free radicals so a diet high in these is essential and have even been linked to reducing the risk of heart disease. A single orange can provide almost all the RDI of Vit C so the more the merrier here.

For the same reason Vit C helps with immunity, it also helps to prevent skin damage and can even help with the appearance of anti-aging. As well as being high in Vit C, Oranges have high levels of Vitamin A the properties of which keep the body moisturised, in particular the eyes.

They contain high levels of insoluble fibre which not only makes you feel fuller for longer but is key to maintaining healthy bowel function by preventing constipation and can even prevent IBS. The rich fibre content also means they control blood sugar levels making them a great choice for everyone but in particular diabetics.

For all these reasons, they make a great snack so next time you're snacking, reach for an Orange!