This article comes from public micro-channel number: husk (ID: Guokr42) , author: Generation day medicine, the subject map from: FIG insect
On average 6 seconds, everyone will choose the food to buy
图 丨 giphy
Why are labels so cruel?
Researchers are not deliberately disrupting your mood, because the food labels are written in more and more detail, but everyone does not choose a healthier diet. Not to mention the detailed information about fats and carbohydrates, most people have not even looked at energy and are unwilling to calculate the meaning of a large number of numbers.
Yes, I want to knowThe energy of a pack of potato chips depends on the energy of each serving, then multiplies the content of the whole package, and then calculates whether it can be eaten. When we look at the 6 seconds of packaging, we have no time to make such a complicated measurement. Many studies have confirmed that labeling energy alone does not significantly improve people’s diet choices.
If the energy is converted into an equivalent specific amount of exercise, it will be more convenient to show the target on the front of the package. [2] . Seeing a pizza takes 4 hours to burn, and a salad only takes 15 minutes, you may also change your choice.
The calculation is too cumbersome, and the exercise label is concise 丨 Picture creative
Exercise labels are simple and crude, but effective
Researchers anticipated your hesitation, and at the same time forced everyone to control the need for diet and weight loss. In 2012, for the first time, the impact of exercise labeling on dietary choices was tested. [3] . The results were found to be effective, and subsequent experiments gradually focused on this topic.
A recent study published in the (Journal of Epidemiology and Community Health) in the Journal of Epidemiology and Public Health 15 higher-quality trials that analysed people’s responses to this “cruel” label.
The results show that when the amount of exercise required to consume food energy appears on the package or menu, The average energy of food selected by people is reduced by 64.9 kcal, and the actual energy consumed is reduced.80.4 kcal and 27.1 grams less weight.
Do you choose left or right? 丨 Reference [2]
Exercise labels are significantly better at restricting diet than labeling energy alone. And whether it ’s a meal, snack or drink, the amount of exercise is useful.
Although this is only for the current meal, it is not clear whether it will be sustainable after the [4-6] The effect can be maintained. It can reduce energy intake by about 200 kcal throughout the day, and the weight loss effect is considerable in the long run. And when people reduce the total energy of a meal, they will preferentially reduce desserts and beverages. [7] . This is not only good for weight loss, but also good for your health.
However, while the exercise label is concise, sacrifices some accuracy. People of different ages, weights, exercise levels and physical conditions are different when exercising. The energy of the same piece of cake can be consumed by one person for half an hour, and another person may take one hour. But only a certain number can be written on the label, so it is a [5] which is a rough estimate based on the average consumption of people. In addition, it is difficult for the label to include the energy required to repair the body after exercise, which may slightly overestimate the amount of exercise required.
Different weight and body shape have different energy consumption 丨 Picture creative
The cruel reality is beyond your imagination
“I’m tired after running for an hour! I want to eat fried chicken, cola cake, milk tea …” Many people are like this, and they have trained themselves to become a good fat man. Most people underestimate dietary energy and overestimate exercise expenditure, so we will be surprised to see the amount of exercise on the label.
At least two-thirds of people are underestimating when estimating dietary energy. Only people who are on a diet are more accurate in their estimates. Perhaps because of their long-term focus on energy, their estimation experience is more abundant. [8] . In a meal of 836 kcal, people will underestimate an average of 175 kcal. The more you eat, the greater the deviation. [9] . Moreover, the promotion of healthy foods has a certain confusing effect. Compared to what is defined as unhealthy fast food, people will further underestimate the energy of 20% to 25% when eating healthy foods.
As we underestimate our intake, we also overestimate the energy we consume. Two-thirds of healthy people underestimate their meditation time [10] . When assessing the amount of exercise, less than half of the people who think they have less exercise, and the number of people who feel that they have a lot of exercise are at least twice the actual measurement. span>.
In a single exercise, people ’s energy consumption estimates can be as high as 3 to 4 times, and the deviations of different exercise types and intensity estimates are different. [8] . If people are required to eat food with the same energy after exercise, most people will consume 2 to 3 times the energy they just consumed. [12] . This is why some people get fatter as they practice, and it is also an advantage of the exercise tag.
Insist on exercise but gain weight 丨 Picture creative
Forgot to exercise? Remind you when you eat
The amount of exercise tag not only regains our optimistic estimate of energy, but also always reminds us of exercise. If the time or length of walking required appears on the food label, most people feel that this will increase their exercise volume [7] .
A recent study confirmed that people do exercise more because of this. Researchers labeled the same work lunch with energy or exercise, respectively. After one year, compared to employees who ate energy-labeled foods, people exposed to exercise-labels increased their exercise time by 13% to 26% per week.
Exercise label supervises exercise 丨 Picture creative
Although “It takes an hour to run” has not yet appeared on the potato chip packaging, its energy has always been so much, whether you really do not count it or pretend it is invisible. Spending more time on diet choices may reduce the number on the scale.
References:
[1] Hamlin RP, McNeill LS, Moore V. The impact of front-of-pack nutrition labels on consumer product evaluation and choice: an experimental study. Public Health Nutr. 2015; 18 (12): 2126-2134.
[2] Masic U, Christiansen P, Boyland EJ. The influence of calorie and physical activity labelling on snack and beverage choices. Appetite . 2017; 112: 52-58.
[3] Bleich SN, Herring BJ, Flagg DD, et al. Reduction in purchases of sugar-sweetened beverages among low-income Black adolescents after exposure to caloric information. Am J Public Health. 2012; 102 (2): 329-335.
[4] Viera AJ, Gizlice Z, Tuttle L, et al. Effect of calories-only vs physical activity calorie expenditure labeling on lunch calories purchased in worksite cafeterias. BMC Public Health. 2019; 19 (1): 107.
[5] Seyedhamzeh S, Bagheri M, Keshtkar AA, et al. Physical activity equivalent labeling vs. calorie labeling: a systematic review and meta-analysis. Int J Behav Nutr Phys Act. 2018; 15 (1): 88.
[6] Viera AJ, Antonelli R. Potential effect of physical activity calorie equivalent labeling on parent fast food decisions. Pediatrics. 2015; 135 (2): e376-82.
[7] Antonelli R, Viera AJ. Potential Effect of Physical Activity Calorie Equivalent (PACE) Labeling on Adult Fast Food Ordering and Exercise. PLoS One. 2015; 10 (7): e0134289.
[8] Brown RE, Canning KL, Fung M, et al. Calorie Estimation in Adults Differing in Body Weight Class and Weight Loss Status. Med Sci Sports Exerc. 2016; 48 (3): 521-526.
[9] Block JP, Condon SK, Kleinman K, et al. Consumers’ estimation of calorie content at fast food restaurants: cross sectional observational study. BMJ. 2013; 346: f2907.
[10] Schaller A, Rudolf K, Dejonghe L, et al. Influencing Factors on the Overestimation of Self-Reported Physical Activity: A Cross-Sectional Analysis of Low Back Pain Patients and Healthy Controls. Biomed Res Int. 2016; 2016: 1497213.
[11] Colpani V, Spritzer PM, Lodi AP, et al. Physical activity in climacteric women: comparison between self-reporting and pedometer. Rev Saude Publica. 2014; 48 (2): 258-265.
[12] Willbond SM, Laviolette MA, Duval K, et al. Normal weight men and women overestimate exercise energy expenditure. J Sports Med Phys Fitness. 2010; 50 (4): 377-384.
[13] Deery CB, Hales D, Viera L, et al. Physical activity calorie expenditure (PACE) labels in worksite cafeterias: effects on physical activity. BMC Public Health. 2019; 19 (1): 1596.
This article comes from public micro-channel number: husk (ID: Guokr42) , author: Generation days Medical