Can Stress Make You Fat?

 

Stress. It makes you depressed. It makes you tired. It makes you snap at the people you love. Stress can make you drink the whole bottle of wine when you only meant to have a glass. Stress can also make you fat.

Scientists at the Universityof Liverpoolfound that women exposed to a range of mentally and physically stressful tasks ate 20 per cent more of the free chocolate they were offered, compared to when they didn’t have to do the tasks.  However, the stress-fat connection isn’t just down to those uncontrollable urges to eat a packet of Tim Tams. It appears that the effects of stress can alter the way our bodies deal with food

Research at the Universityof Californiain San Franciscofound that out of 160 women between 30 and 46 years old, those with the biggest waist measurements reported the highest levels of stress. Meanwhile, Dr Pamela Peeke, one of a team of researchers at the National Institutes of Health in America, has discovered that hormones secreted during times of stress are instrumental in causing more fat to be stored, particularly around the abdomen.

It works like this.

  • A hormone called CRH (corticotrophin-releasing hormone) rises in response to stress, triggering amongst other things, a release of cortisol and adrenalin (the ‘stress’ hormones), to help prepare the body for action.
  • Cortisol stimulates the release of glucose to provide fuel for fight or flight while adrenalin primes the nervous system for action.
  • Once the crisis is over, adrenalin disperses, but cortisol — and the glucose it has drawn into the blood — lingers, causing a surge of insulin.
  • This stimulates the appetite to encourage the body to restore its fuel stores, to be ready to cope with the next confrontation.
  • Of course, these days, our confrontations tend not to be with hairy mammals and other things we need to run away from, so we rarely expend any energy in our stressful encounters. We do still end up refuelling however, because we’re hard-wired to do so. This excess body fat is stored ‘viscerally’,  or deep within the abdomen, where it raises our risk of heart disease and diabetes.

So what to do about it? One of the most obvious ways to solve the problem is to reduce or eliminate stress by changing your lifestyle and learning coping strategies. A sensible approach — but frankly, easier said than done. So how about ‘reinstating’ the fight or flight response, by following stressful events and experiences with some physical activity, like we were born to do?

Not only will this dissipate those stress hormones, it will also release beta-endorphins, making you feel calm and contented. And  you will be a super athlete in no time with all that exercise each time you stress out about something! More importantly, regular workouts will enable you to become more stress-resilient in the future. The fitter you are, the lower the rise in cortisol under stressful conditions.

Reference http://www.realbuzz.com/articles/can-stress-make-you-fat/

Waist Measurements

Why measure your waist?

Measuring your waist is a simple check to see how much body fat you have, and where it is placed around the body. The location of body fat can be an important indicator of your risk of developing certain chronic diseases. Whatever your height or build, an increased waistline is a sign you may be at greater risk of ongoing health problems such as type 2 diabetes, heart disease, stroke, high blood pressure and some cancers.

 

How to measure your waistline

  • Measure directly against your skin
  • Breathe out normally
  • The tape should be snug, without compressing the skin
  • Measure your waist half way between the lowest point of your lowest rib and the highest point of your hip bone. If you palpate at the side of your tummy you will feel these bony landmarks.

What does it mean?

No matter what your height, the following waist measurements suggest you could be at an increased risk of developing a chronic disease.

 

Increased Risk
Women: more than 80cm
Men: more than 94 cm

Greatly Increased Risk
Women: more than 88cm
Men: more than 102 cm

 

These waist measurements are recommended for Caucasian men and Caucasian and Asian women. Not enough research has been done on other groups for a definitive measurement to be established.

References: Australian Better Health Initiative. Fact Sheet: How do you measure up?

Sugar Free Food Labelling

sugar

If you’re looking at reducing the amount of sugar in your diet, you need to be aware of what the labelling means. Here’s a quick summary.

In Australia, the Code of Practice on Nutrient Claims in Food (CoPoNC) sets out the provisions for “low”, “free”, and  “no sugar” claims as:

Sugar Free, No Sugar, Zero Sugar

Foods must contain less than 0.2grams of sugars per 100 grams of edible portion of the food Liquids must contain less than 0.1grams for 100 grams of edible portion

The policy of the Australian Competition and Consumer Commission however has a zero tolerance policy in relation to the term “free”. So technically, foods which are labelled “sugar free” and include the small tolerance level of sugar allowed for under the CoPoNC, are in breach of fair trading laws.

No Added Sugar

Foods must not have sugar or sugar containing ingredients added to them. This means that sugars  including dextrose, fructose, sucrose, lactose, starch hydrolysate, glucose syrups, maltodextrin and similar products, icing sugar, invert sugar, fruit sugar syrup, honey, malt, malt extract or maltose products, or products derived at a sugar refinery including brown sugar and molasses is NOT added to the food during processing.

“No added sugar” foods can still contain high amounts of natural sugars. Normally, “no added sugar” foods have a low Glycemic Index, which means they don’t cause a rapid spike in blood sugar.

Low in Sugar

Foods must contain no more than 5g total sugars per 100grams of edible portion. Liquids must contain no more than 2.5grams per 100 grams of edible portion.

Fun Run Nutrition: Raisins vs Chews and Gels

 

 

Raisins are a cheap natural source of carbohydrates which have been found to be as effective as carbohydrate chews in producing a workout boost.

 

 

Researchers from California-Davis University have found raisins to be as effective as sports chews when athletes’ performances were tested in a 5km time trial which was conducted 2 days after a 2 hour run during which they consumed either raisins or sports chews. When just water was consumed during the 2 hour run, the athletes did not perform as well in the time trial 2 days later. The trial included only 11 athletes so it was a fairly small sample, but it’s certainly food for thought (pardon the pun).

 

This table shows you the nutritional breakdown of a couple of gels and chews, and raisins. Note the raisins do have some dietary fibre so could cause some GIT upset, but then gels and chews can have the same effect with some people.

GU ROCTANE GEL (one serve=1 sachet) GU ENERGY GEL(one serve= on sachet) GU CHOMPS (one serve = 4 pieces -1/2 a sachet) RAISINS (one serve = 35 gms-about what you can hold in the palm of your hand)
Weight 32gms 32 gms 30 gms 35 gms
Calories 100 100 90 100
Total Carbohydrate 25gms 20 gms 23gms 25 gms
Fat 0 2gms 0 0.3 gms
Sugars 5gms 6gms 11gms 24 gms
Sodium 125gms 40 gms 50 gms 20 gms
Potasium 55gms 40 gms 40 gms 364 gms
Vit E amt not stated amt not stated amt not stated
Calcium amt not stated amt not stated amt not stated 14 gms
Amino Acid Blend 1220 mg no protein no protein 800 mgs
Caffeine 35 mg nil nil nil
Dietary Fibre 1.7 gms

 

What works for one person doesn’t necessarily work for another.  The only way you’ll know if raisins work for you is to trial them in training, NOT in a race. And best to trial it first in the off season. Don’t muck around with your race and training nutrition when a mistake might really make a difference to your race results. Personally, I like a gel with a touch of caffeine, but each to their own. I’m struggling with the concept of trying to get all those loose raisins under control whilst I’m running too. You can read the full article in the Journal of The International Society of Sports Nutrition.

 

Share your experiences with race and training nutrition below.