Showing posts with label during. Show all posts
Showing posts with label during. Show all posts

Saturday, March 21, 2015

Slow Cooking During a Recession

Im hopping on a plane in a little bit to head to Chicago for the 5th annual BlogHer conference, where Ill be speaking on the "Food Blogging During a Recession" panel. I look forward to reconnecting with the talented women behind Simply Recipes, and Lunch in a Box, and meeting those behind Show Me the Curry, and Wine Girl.

Im both excited and nervous. Im excited to be going to another BlogHer conference---my first was last year, and I had a ball. I had more fun in 3 days at that conference than I had in all 5 years of college.

Im nervous to leave the kids for so long. Im not nervous for them---theyll have an absolute ball with my parents, Im nervous about being so far away and missing them. Dreadfully.


hang on, I need to blow my nose.


Im excited that Adam is coming with me. We havent gone away alone for about 6 years. I love that Adam has agreed to share his birthday and our 10-year anniversary with 1500 women bloggers.

Im nervous about flying. Super nervous.

I really shouldnt talk about it, or Ill hyperventilate.

Im also kind of nervous to be around so many people, who all seem to know each other. Im a fairly new blogger, and I definitely get butterflies in my stomach at blogging events.

Im thrilled to be speaking on the Food Blogging panel, but I feel a bit like Im cheating since its about Food Blogging During a Recession. Slow Cooking is pretty much built for recession (I hate that word) eating.

I first started slow cooking as a newlywed to save time and money. I loved it that I could throw in some forgotten and frostbitten meat with a jar of pasta sauce and come home to a tasty meal with literally no work on my end.
I love how you can save SO MUCH MONEY through slow cooking. It does take a bit of beforehand planning, I know, but the reward of not slitting your wrists at the end of the week is well worth it.

Ive shared in the past that I didnt save any money last year with my year-long slow-cooking challenge. We knew that I would spend more money on groceries and planned accordingly. Im so glad that last year was last year, because Id have a hard time justifying the spices I bought last year and the duck and the haggis parts this year. It would just be wasteful.


Here are the top 10 ways that you can save money right this minute by slow cooking:

1) Plan your meals. Seriously. Take the time on Sunday night to plan your meals out. Many people do red meat on Monday, chicken on Tuesday, leftovers Wednesday, vegetarian on Thursday, and fish on Friday. Its up to you if you plan for the weekend days. We seem to always be out of the house for at least one of the weekend evenings, but I still try to have an idea for a dinner so were not reaching for the take-out menus.


2) Use dried beans. They are filling, nutritious, freeze well, and are CHEAP.


3) Make your own yogurt. Yup, in the slow cooker. It totally works.


4) Make your own granola. Granola is wickedly expensive, and can be laden with preservatives and artificial sweeteners.


5) Make your own baby food. This is so easy, and really makes a whole lot of sense. The little jars are bad for the environment and your wallet.


6) Make your own take-out.
In my book (have I mentioned the book? Its oh so pretty, and frugally priced, I might add) I have a chapter Ive entitled Take Out Fake Out.

here are some of my absolute favorites:


Mongolian Beef
Lemon Chicken
Pho
Thai Curry
Indian Curry
Chicken Makhani (Indian Butter Chicken)
Thai Coconut Curry Soup
Fried Rice
Chow Mein (this is SO SO SO good! great, now I want this. Now. have I mentioned Im pregnant?)
Gyros
Tamales
Philly Cheesesteaks

7) Cook the lazy way.

8) Re-purpose leftovers. Cook a Rotisserie-Style Chicken. Then make Barbecue Chicken and Cornbread Casserole the next night. Then make broth. Then make Clean-out-the-Pantry Minestrone Soup, or Chicken Noodle Soup.


9) Stretch your wine budget by making mulled wine.


10) If you, or someone you love, has allergies, cooking from scratch is a necessity to ensure that you have safe food. There is no easier way to cook than to slow cook. Im a complete fool in the kitchen, yet I can work a slow cooker. You can too.


For further reading:

Save Money By Using Your Slow Cooker
Meal Planning with the Slow Cooker
Frequently Asked "A Year of Slow Cooking Questions"
Alphabetical Listing of All Recipes

There are so many other great ways to save money through slow cooking, and Id love to hear other great ideas---feel free to leave as many as youd like in the comments, or a link to your favorite budget-friendly recipe.

If youre headed to Chicago for the conference, please come by the Food Blogging During a Recession Panel and say Hi! I look forward to meeting new people, and reconnecting with those I met last year.
Read more »

Saturday, March 7, 2015

Carbohydrate Supplementation During Workouts Who Benefits How Much and Which Type s of CHO are Best

Compared to liquid beverages, gels have the advantage of causing lower GI stress, when significant quantities of CHOs are consumed during exercise. Bars, can be held in the cheek pouch and chewed during critical phases of a race.
The headline gives it away. Todays SuppVersity article is a brief review of the (mostly sponsored) literature on Gatora.... ah, I mean carbohydrate supplementation during exercise. The headline also implies that the usefulness and efficacy of carbohydrate supplements depends on exercise duration and the type of exercise.

As a seasoned student of the SuppVersity you will know that certain paradox involved with regard to the duration / type of exercise. Short exercise durations, for example, shouldnt require large CHO boluses, long duration exercise, on the other hand, is fueled mostly by fat - so why should you supplement with carbohydrates, anyway?
Want to improve your exercise performance? Try sodium bicarbonate, as well!

The Hazards of Acidosis

Build Bigger Legs W/ Bicarbonate

HIIT it Hard W/ NaCHO3

BA + Bicarb are Synergists

Bicarb Buffers Creatine

Creatine + Baking Soda = 2x Win!
I promise to answer this and other questions in the following paragraphs, but before I do so, I would like to point out that there is as of now no evidence that the much-praised "fat adaptation" increases the exercise performance to an "Olympia" level. Carbohydrate supplements, on the other hand, are still part of the regular supplementation regimen for the 99% of the top athletes.

That being said, the human physiology dictates that the use of carbohydrate supplements during aerobic workouts that last less than 60 minutes is useless, because muscle glycogen is generally not limiting to performance when exercise durations are less than ~60 minutes.

It should not work for short duration exercise, but it still does

Interestingly, 16 out of 23 studies, Trent Stellingwerff and Gregory R. Cox from the Canadian Sport Institute-Pacific and the Australian Institute of Sport reviewed for their recent paper in Applied Physiology have found that carbohydrate supplementation and/or oral (mouth) exposure to carbohydrate can improve performance of tasks less than 1 hour in duration:
You wont fully deplete your muscular glyocogen levels
during short duration resistance training (Haff. 2003)
"In 2004 a seminal paper was published showing that a carbohydrate mouth-wash (swirling 25ml of a 6% CHO beverage (only ~1.5g of CHO in 25ml [6.4% maltodextrin solution (CHO)]) around in the mouth for ~10 sec, every 7.5min) significantly improved time trial (TT) performance [in seven male and two female endurance cyclists] by ~3% (Carter et al. 2004a)." (Stellingwerff & Cox. 2014)
This effect of CHO mouth-washing to improve performance in events from 30-60min has now been replicated in several other performance studies (10 of 13 studies) using both cycling and running interventions and with both sweet (sucrose) and non-sweet (maltodextrin) caloric CHO sources,as compared to 5 non-caloric artificial sweetener placebo trials showing no performance enhancing effects.
Figure 1: Hard to believe, but true - In 2010 Pottier et al. observed that CHO mouth-rinsing, but not CHO ingestion increases the 1h high intensity time-trial performance in trained subjects.
 "All these findings have been mechanistically supported with a functional magnetic resonance brain imaging study showing that CHO mouth-washing from both sweet tasting glucose and non-sweet maltodextrin can stimulate the brain areas of the insula/frontal operculum, orbitofrontal cortex and striatum, which are involved with brain centers responsible for reward and motor control (Chambers et al. 2009). Interestingly, if the mouth (oral receptors) and GI tract is by-passed by CHO infusion straight into the blood stream then 1h cycling TT performance was unaltered as compared to no CHO supplementation (Carter et al. 2004b)." (Stellingwerff & Cox. 2014)
Studies evaluating the effects on perceived exertion (Fares et al. 2011) found similar benefits all of which support the idea that the effect does not occur in the musculature, but rather in the head.
So what do you do to benefit during short-duration (<60) minute workouts? To benefit during short duration exercise exercise (<1h) ~1.5g of high GI carbohydrates (30g/h total = max) consumed or used as a mouth-wash in servings of 25ml for 5 to 10 sec every 8 to 10 min of exercise will do the trick. Since it can be difficult to actually drink / mouth-wash with CHO during critical phases of the race, Stellingwerff and Cox suggest "placing a sports confectionary in the cheek cavity" as a more practical option for some athletes.
It should be obvious that the physiological, or rater intra-muscular benefits of carbohydrate supplements increases with the exercise duration.

CHO supplementation during exercise that lasts 60 minutes or longer

In view of the fact that it is 100% logical and well established by studies by Coyle et al. (Coyle 1992a; Coyle 1992b) that the intake of carbohydrate (glucose alone, and glucose + fructose blends) can significantly improve prolonged endurance capacity and performance (>60min of exercise (Jeukendrup 2010)).
Figure 2: Overview of the performance increases in the 50 studies Stellingwerff & Cox reviewed (2014)
Against that background I will not bother you with another overview of the results, but focus on the efficacy of different carbohydrate supplementation strategies and types of carbohydrate supplements for exercise durations beyond the "magical" hour.

Glucose + fructose - the combination advantage

As a SuppVersity reader youve previously heard about the benefits of combining glucose and fructose in your intra-workout beverage. It is thus only logical that most commercially available formulas are mixtures  glucose + fructose (GLU:FRU) or maltodextrin + fructose - so-called "multi-transportable CHOs". The advantage of using both glucose and fructose is that the carbohydrates will be absorbed via SGLT1 and GLUT5 intestinal transporters.
Comparison of single vs. mutliple CHO sources (CHO, carbohydrate; FRU, fruc- tose; GLU, glucose; Perf, performance; P, placebo; TT, time-trial; TTE, time to exhaustion; Signif, Significant; SUC, sucrose; Stellingwerff & Cox. 2014)
Fructose + glucose mixtures excel, but it takes carbohydrate intake rates of more than 60g/h for the advantages to reach statistical significance. Why? Well, less than 60g/h dont overload the regular glucose transporters in the gut, and the advantage of having both SHLT1 and GLUT5 intestinal transport becomes irrelevant. Several studies have now shown that high intake rates (>70g/h) of GLU:FRU blendsduring moderate intensity, prolonged (>2h) exercise, results in ~8% improvement in endurance performance over both a  1h  TT  (Currell  and  Jeukendrup  2008)  and  over  100km  of  cycling  (Triplett,  Doyle  et  al.  2010) compared to glucose alone, and 19.5% versus water (see Table 1). Another research group has shown  further increases in performance with GLU:FRU blends over multiple sprints  after an endurance pre-load (OBrien and Rowlands 2011; OBrien, Stannard et al. 2013).
Specifically during long(er) duration exercise, when the carbohydrate consumption can exceed 60g/h there is a significant performance increase with multi- vs. single source carbohydrate supplements (Stellingwerff & Cox. 2014)
An advantage that has been scientifically established among others by Jeukendrup et al. (2010) who found that this pattern of CHO ingestion results in ~20 to 50% higher CHO oxidation rates compared to the ingestion of a drink that contains nothing but glucose or maltodextrin.


Now an increase in carbohydrate oxidation alone does not sound like something you would aim for as an endurance athlete. In practice, increases in carbohydrate oxidation have yet been shown to increase the performance during prolonged exercise bouts compared to isocaloric glucose-only beverages. (Currell et al. 2008; Triplett et al. 2010; OBrien et al. 2011; OBrien et al. 2013).
So how much does it take during long(er) 1-2h+ exercise: Youve already learned that glucose + fructose mixtures should be preferred to carbohydrate supplements with only one type of CHO. While 30-60g/h, which is the amount of carbohydrates that is currently suggested by the American College of Sport Medicine (ACSM 2000; Sawka, Burke et al. 2007) appears to be be enough for exercise durations ranging from 60-120 minutes, recent evidence suggests that hard exercise bouts which last longer than 2h require up tp 90g/h or carbohydrate solutions with a CHO content of >8%.
Needless to say that there is still research to be done with respect to individual influencing variables of carbohydrate requirements. The currently available evidence, for example, is largely based on results from runners and cyclists. Two other factors / issues that come to mind are...
  • the dose-response relationship, which appears to be capped at 75g/h - at least according to a large-scale multi-center study by Smith et al. (Smith. 2013) who found that their subjects, endurance trained cyclists or triathletes experienced significant performance increases, with increasing amounts of carbohydrates (0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110 and 120g of CHO/h) during a 2h constant load ride.

    Figure 3: Mean log time to complete time trial (natural) as function of CHO treatment condition with fitted quadratic curve (with 95% CI of mean curves). Differences 100 represent percent change in performance. The quadratic function relating CHO ingestion rate to time complete time trial for 43% (95% CI = 11%–75%,P= 0.059) of the variation in mean performance score (Smith. 2013)
    The CHO given was a 1:1:1 glucose:maltodextrin:fructose blend. Results indicated incremental performance improvements of 1.0%, 2.0%, 3.0%, 4.0%, and 4.7% at 9, 19, 31, 48, and 78g CHO/h, respectively, with diminishing performance enhancement seen at CHO levels >78g/h.

    The optimal amount for performance (+4.7%) was 78g/h, with a range of 68 to 88g/h. However, even at 10g/h, a 1.0% increase in performance was observed, showing even a small amount of carbohydrate has the potential to positively impact performance. 
  • the optimal mix of glucose, dextrose, fructose, maltodextrin or other "special" carbohydrates  - needless to say that waxy maize, hydroxypropyl distarches (learn more) or the expensive fast absorbing highly insulinogenic patented carbohydrate source Vitargo come to mind, when we are talking about finding the optimal mix of different carbohydrate sources - a mix, by the way, of which you can safely assume that it will differ according to the physiological demands of the workout and the exercise duration.

    One thing we shouldnt forget, though, is that next to optimal performance, optimal GI tolerance, i.e. the absence of bloating, diarrhea & co would be an important criteria the "optimal" carbohydrate blend would have to meet.
  • Figure 4: CHO suppl. ameliorates  testosterone reductions in 800m runners (de Sousa. 2010)
    the impact of carbohydrate supplementation on hormonal changes during and in response exercise - several human studies suggest that CHO supplementation attenuates the suppression of the hypothalamic-pituitary-gonadal axis and the rise in stress hormones during periods of intense training; a recent rodent study shows that the provision of carbohydrate supple- ments can prevent / reverse exercise-associated menstrual dysfunction (de Sousa. 2010; Zhao. 2014)
I guess, I could come up with additional research gabs, but in the end, a list of "gaps" is not exactly useful for you. Much in contrast to a conclusion, which I am about to formulate in the bottom line, now.
Bottom line: As of now it looks as if the recommendations I made in the light(er) blue boxes for short (<1h), long (1-2h) and ultra-long (>2g) workouts are the best we have.

For the majority of resistance trainees, intra-workout carbohydrate supplementation is at best facilitative. The repletion of the depleted glycogen stores after your workouts, however, is necessary | learn more about glycogen repletion
What I find particularly interesting is that for shorter duration exercise situations (<1h) and high(er) exercise intensity, similar benefits can be achieved with swallowing vs.  outh-washing with only 30g/h of liquid CHO sources. Performance increases in the 2.6% ± 3.3% range may not sound earth-shattering, but if you were running for an hour, your competitor who made sure to bring a carb bottle would be 83s faster than you are - thats 83s which could make the difference between first and last place.

For longer duration exercise, the studies, Stellingwerff and Cox reviewed in the previously cited article yielded an intermediate improvement of 4.9%±4.9% with significantly higher values in studies investigation long(er) + higher intensity exercise. The notion that carbohydrate supplements were useless and the various position statements of sporting bodies all over the world just a concession to the sponsoring money of the industry is thus unwarranted | Comment on Facebook!
References:
  • Carter,  J.,  Jeukendrup,  A.E.,  Mundel,  T.,  and  Jones,  D.A.  (2003).  Carbohydrate  supplementation  improves moderate and high-intensity exercise in the heat. Pflügers Archiv : European journal of physiology446: 211-9.
  • Carter, J.M., Jeukendrup, A.E., and Jones, D.A. (2004a). The effect of carbohydrate mouth rinse on 1-h cycle time trial performance. Medicine and science in sports and exercise36: 2107-11.
  • Carter, J.M., Jeukendrup, A.E.,  Mann, C.H., and  Jones, D.A. (2004b). The effect of glucose infusion on glucose kinetics during a 1-h time trial. Medicine and science in sports and exercise36: 1543-50. 
  • Chambers,  E.S.,  Bridge,  M.W.,  and  Jones,  D.A.  (2009). Carbohydrate  sensing  in  the  human  mouth:  effects  on exercise performance and brain activity. The Journal of physiology587: 1779-94. 
  • de Sousa, Maysa Vieira, et al. (2010). Effects of carbohydrate supplementation on competitive runners undergoing overload training followed by a session of intermittent exercise." European journal of applied physiology 109.3: 507-516.
  • Fares, E.J. and Kayser, B. (2011). Carbohydrate mouthrinse effects on exercise capacity in pre- and postprandial States. J Nutr Metab2011: 385962.   
  • Pottier, Andries, et al. (2010). Mouth rinse but not ingestion of a carbohydrate solution improves 1‐h cycle time trial performance" Scandinavian journal of medicine & science in sports 20.1: 105-111.
  • Sawka,  M.N.,  Burke,  L.M.,  Eichner,  E.R.,  Maughan,  R.J.,  Montain,  S.J.,  and  Stachenfeld,  N.S. (2007).  American College of Sports Medicine position stand. Exerciseand fluid replacement. Medicine and science in sports and exercise39: 377-90.
  • Smith, JohnEric W., et al. (2013). Curvilinear dose-response relationship of carbohydrate (0-120 g/h) and performance." Med Sci Sports Exerc 45.2: 336-341. 
  • Stellingwerff, T., & Cox, G. R. (2014). Systematic Review: Carbohydrate Supplementation on Exercise Performance or Capacity of Varying Durations. Applied Physiology, Nutrition, and Metabolism (2014). Ahead of Print. 
  • Zhao, Can, et al. (2014). Effects of carbohydrate supplements on exercise-induced menstrual dysfunction and ovarian subcellular structural changes in rats." Journal of Sport and Health Science 3.3: 189-195.
Read more »

Thursday, March 5, 2015

Study Suggests Frozen Veggies Worse Than Common Wisdom Says Frozen Asparagus Zucchini and Green Beans Lose More Antioxidants During Boiling

Green asparagus from the fridge and  from the market are not created equal - at least not when they finally end up on your plate after a short bath in hot water.
You just have to watch one of the consumer report shows on television to hear it: "Frozen veggies are way better than their reputation would suggest." Actually, here in Germany this sentence has been repeated to soften that Ive even heard people say theyd buy the frozen broccoli because it contained "more vitamins and the other good stuff, you know." And you know what? For some veggies like spinach, for example, this may actually be the case. For others, like broccoli or peas, the nutrient status of the frozen and the raw uncooked vegetable appears to be more or less identical (Favell. 1998). But thats something you cannot say for the green asparagus stems, zucchini and green beans in a recent study from the Università degli Studi di Parma in Italy.
Warning: Dont take this article as an excuse and stop eating veggies completely. The frozen stuff may lose more vitamins, when you boil it, but (a) you can still blanch it and (b) even with significantly reduced antioxidant effects veggies are still among the healthiest things you can eat.
I am not an asparagus expert and can still tell that the cell structure of the Transverse  sections boiled (C - from raw | D - from frozen) is profoundly messed up compared to the raw (A) and blanched (B) variety | legend: c = collenchyma; vp = vascular bundle; p = parenchyma; f = fissure.
In the corresponding experiment, the Italian researchers bought Green asparagus stems (Asparagus officinalis L., var. Grande), zucchini (Cucurbita pepo L., va Quine) and green beans (Phaseolus vulgaris L., var. Giamaica) from a local producer and processed them within 24 hours from harvesting. For each of the veggies four samples were prepared: Raw/uncooked  (R), raw/boiled  (B), blanched (BL) and industrially frozen/boiled (FB)

The raw (ten kilograms of each vegetable), blanched (five kilograms of each vegetable) and industrially frozen  samples  (five  kilograms  of  each  vegetable) had been transported were  transported  to  the  University of  Parma laboratories  under  adequate  refrigerated conditions to avoid the exuberant nutrient loss that occurs upon inadequately slow (re-)freezing.
SuppVersity Suggested Read: " Conventional vs. Organic: Its Not About Getting More, But Getting Less For Your Money. Less Pesticides, Dioxins & Co" | read more if you want to know if the claim "organic is always better" is a similar misconcept as "frozen over fresh".
If you "freeze" your veggies in the freezer compartment of your fridge, this will make the cells blast, so that even before they are cooked, and the nutrients flow out. It is generally assume that the latter would not happen, if the veggies are shock-frosted.
Figure 1: Total antioxidant capacity of green asparagus, zucchini and green beans raw, blanched, boiled and frozen and boiled (Paciulli. 2014); as the data tells you frozen veggies with similar  icy grease on them like you see on the right may not really be a better source of antioxidants than fresh veggies from the farmers or even the supermarket.
If we look at the data in Figure 1, though, it would appear that the cells may have "cracked" already so that they are more susceptible to the subsequent heat assault and the frozen + boiled samples end up having consistently lower total antioxidant (Figure 2) and feric acid reducing capacity than their raw + boiled counterparts.

For a similar reason (nutrient retention), the blanched samples have been cooled immediately after blanching in an ice-water bath for 3 min before they have been transported to the laboratories, where their analysis shows that only the Zucchini lost a small, but significant amount of their total antioxidant activity.
Figure 2: It would be interesting to see if the negative effects of freezing and boiling occur in all vegetables. In view of the fact that previous studies compared raw vs. frozen, but nor raw + cooked vs. frozen + cooked, frozen Broccoli + cooked broccoli could be exactly as "bad" as asparagus, zucchini and green beans.
The thing that is of most practical relevance, tough, is the significant negative effect of freezing + boiling on both, the total antioxidant capacity (Figure 1) and the ferric reducing capacity (Figure 2) of all three vegetables.

The previously "cited" statement that youre better of with the "fresh" frozen veggies is thus probably only right, if you eat them raw. Compared to fresh veggies, the previously frozen asparagus, zucchini and green beans lost almost 11-30% of their antioxidant prowess during the cooking process - and the same may well happen to other veggies, including broccoli, which have been compared in previous studies only on a raw vs. frozen, but not on a cooked vs. frozen + cooked basis. Unless youre afraid that all the good veggies may limit your gains due to their potent anti-oxidant effects, it appears smart to stay away from their frozen varieties.
References:
  • Paciulli, Maria, et al. "Impact of the industrial freezing process on selected vegetables Part I. Structure, texture and antioxidant capacity." Food Research International (2014).
Read more »