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Monday, 22 September 2008

Post workout nutrient intake

Ok before we start I’ve had a few people emailing me about nutrition. I’d just like to point out that these observations are not the definitive answer for your training needs. These observations are an ongoing study that is occurring in the field of training nutrition. I expect they will mutate over time as we gather more information. Also, like everything else, individual variation plays a part as well. So, bear in mind that although these are the finding we can draw from today’s research, there could be some changes over time.

Now on with the show:

Most of the information for this has come from the books “Power Eating” by Kleiner & “Nutrient Timing” by Ivy & Portman & I recommend everyone who has an interest buy both these books.
Like last time we’ll split our plan into first goals we wish to achieve from our Post-workout nutrition:

After training get (or keep) us in an anabolic state
Speed elimination by increasing blood flow
Replenish glycogen stores
Initiate tissue repair
Reduce muscle damage & boost the immune system

First let’s look at how easy it is to fall into a catabolic state

Notice how timing plays such a crucial role in your post exercise nutrition plan. Just a 3 hour delay in getting your post-exercise nutrition can push you into a catabolic state. 1

Insulin levels are also raised most by consuming a protein/carb drink 2. This actually causes blood flow to the muscles to increase, so you get more nutrition to the cells & remove waste faster. 3

For the immunity we have increased levels of plasma L-glutamine when protein-carbohydrate is consumed 4.

Also there is performance enhancement on your following training session when you consume a protein-carbohydrate post workout shake instead of simply carbs 5.

So, you can see there is some evidence about mixing simple carbs & proteins for a post workout recovery drink.

Here are the guides I would suggest at the moment:

Protein 30 grams
High glycemic carbs 40-50 grams
BCAA’s 1-2 grams
L-glutamine 5 grams
Vit c 60-120mg
Vit E 80-400 IU.

The best way to consume these:

Here’s the best way to consume the above after exercise nutrition.

Straight after your exercise, but before your cool-down stretch have your BCAA’s , l-glutamine (also a good time if you supplement with creatine to take that as well).

Now do your cool down

After cool-down now consume your protein-carbs-vitamins.

(NOTE: there has been some possible concern raised about vitamin E & health issues, so these rules may be modified if these prove to have some foundation).

New research recently

New research in the American journal of Physiology, Endocrinology has found that co-ingestion of carbohydrate during recovery does not further stimulate post-exercise muscle protein synthesis when ample protein is ingested 6, which has thrown the whole issue open once again, but this is one study that is against the general tide of research, but do bear in mind that this subject is not a closed book & a definitive answer is still some way off.

1 Levenhagen, D.K., Carr, C., Carlson, M.G.,et al., “Postexercise protein intakeenhances whole-body and leg protein accretion in humans.” Medicine and Science in Sports and exercise, 34: 828-837, 2002.

2 Zawadzki, K.M., Yaspelkis, B.B., Ivy, J.L., “Carbohydrate-protein complex increases the rate of muscle glycogen storage after exercise” Journal of Applied Physiology, 72: 1854-1859, 1992.

3 Laakso, M., Edelman, S.V., Brechtel, G., Baron, A.D., “Decreased effect of insulin to stimulate skeletal muscle blood flow in obese men: a novel method for insulin resistance.” Journal of clinical Investigation, 85: 1844-1852, 1990.

4 van der Schoor, P., et al., “Ingestion of protein hydrolysate prevents the post exercise reduction in plasma glutamate.” International Journal of Sports Medicine, 18: S115, 1997

5 Williams, M.B., Raven, P.B., Donovan, L.F., et al., "Effects of recovery beverage on glycogen restoration and endurance exercise performance," Journal of Strength and Conditioning Research, 17: 12-19, 2003

6 Koopman R, Beelen M, Stellingwerff T, Pennings B, Saris W.H., Kies A.K., Kuipers H, van Loon L.J., "Coingestion of carbohydrate with protein does not further augment postexercise muscle protein synthesis." American journal of Physiology, Endocrinology and metabolism, Sep;293(3): E833-42, 2007.

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