【Text, Pictures/Selected from the Eight Banners Culture "The Science of Walking", author Xie Eun Omalo]
Going out of AfricaMoving in this world, regardless of whether it is walking, riding, running, swimming or any form of sports. The body will take (via diet and digest), store and burn energy according to its needs. Humans are lazy and therefore minimize energy consumption of all fixed activities. Human double-leg walking generally automatically minimizes energy consumption and maximizes the walking range. From an experimental perspective, it is like we focus on walking speeds that maximize movement under fixed energy consumption; but how can we prove that the truth is that?
One method is to install a set of external legs for humans; a mechanical device designed to adjust walking difficulty. The different settings we make for this set of exoskeletons can be used to test whether humans will respond at a specific pace to reduce the energy consumed while walking. If the exoskeleton helps walk, we will soon take a step that does not require special effort and let the machine operate more. On the contrary, if the exoskeleton prevents us from walking, we may try to walk with more force, but choose a pattern that can continue walking and spend the least force on it.
Neuroengineer Jusica. Jessica Selinger designed this kind of experience with her colleagues at Stanford University. They match human participants with a specific and leg-high exoskeleton, allowing participants to systematically challenge the most efficient way of human walking. The subjects also wore an oxygen mask to measure their maximum oxygen capacity (VO2 Max). These exoskeleton designs create varying degrees of resistance to the legs, and the resistance depends on the participant's walking frequency. Participants walk on the jogger, and the speed of the jogger can also be adjusted.
participants quickly adjusted due to these changes, usually within minutes; once they are adjusted to a new optimal pace, they can quickly adjust the previous state of the most optimized energy burn (which is measured through VO2 Max). Through this we can see that humans will quickly adopt more economic steps to implement the best walking strategy, thus saving the most energy consumption. These approaches are quite rapid, far faster than the changes predicted in blood oxygen concentration, and faster than other internal perceptions such as muscle changes. From an independent perspective, these changes later appear very slowly; on the contrary, humans will actively predict through the surrounding sensory input, directly adjusting the way of walking.
While wearing a machine exoskeleton will allow you to reduce your energy consumption as much as possible, there is a more common problem: you go to the gym, run a long distance on the jogger, and then return home to the sofa, feeling good about yourself because you are going to exercise, and you don’t realize that your overall exercise is lower than you haven’t stepped into the gym at all. In fact, from an evolutionary perspective, your body will relax after you perform the endurance hunt; the resting state of this movement is different from what we generally think. We always think that the amount of calories we consume is basically equivalent to exercise plus the calories burned by the home; if we consume more calories than exercise and home, it will increase weight.
The teaching we learned from these studies is that increasing the intensity of the movement is not a solution to obesity, because we have evolved into mechanisms and physiological mechanisms to reduce the degree of movement consumption, thereby replenishing the heat of movement consumption. Increased energy consumption does not necessarily lead to a quality and continuous weight loss; reducing weight requires comprehensive calculations for energy intake and energy use. We need to know how the body balances energy intake, energy storage (such as fat distribution), and energy output. Humans are highly edible species. We collect food, we hunt, and we prepare various unique foods. Keeping us flexible with food sources, and simultaneously obtaining and preparing food from various channels, giving us appropriate advantages. You can eat anywhere you find food (whether you are squeezing something to eat or visiting a local restaurant); you can eat while walking (after buying food outside at a fast food restaurant); or you can bring the food back to your residence and cook it in many ways (you can help other hunters to bring back an animal that is badly dynasty and you can kill it by you, or buy various food from a row of shelves in local supermarkets).
High-fat and high-sugar high-heat foods are quite easy to obtain in Western markets, but this is not the case for the Hazards. Therefore, increasing the intensity of activities to be comparable to the Hazards is not the most direct and simple way to solve the problem of obesity around the world. On the contrary, if we want to deal with obesity problems, our public policy should promote changes based on the type of calories we consume, quality, and intake. To be more clear, I am not against sports or against increasing sports strength. Obviously, keeping your activity is better than being calm than keeping it alive. If you can run regularly, you will continue to last for one day, one week, and one year. Sports are both necessary and important to control obesity, but that is only part of it. Energy ingestion is also very important.
Does we manage our regular movement easily because it is essentially beneficial to us? Daniel, an evolutionary biologist at Harvard University. Daniel Lieberman provides an important evolutionary perspective on our quirky relationship with physical activity: Although it is beneficial to us, we always avoid sports to preserve energy because we evolved so much.. Until recently, we had to carry out physical activities because of the scarcity of food sources. As Li Boman said: "In recent times, humans have evolved into appropriately regular medium-endurance energy activity. Because of limited food, humans have been denied that they do not consume unnecessary energy."
{twenty one} {twenty two} Try to think of the following example: The hygiene food departments in many countries recommend that adult women receive up to 2,000 calories per day, and adult men receive up to 2,500 calories per day. If you look at 2,400 calories, this means that the average calorie burn rate is 100 calories per hour, but this counts all the walking and sleeping time. These calories must meet all the needs of the body, including breathing, walking, thinking, digestion, secretion, etc. The food itself must be digested, and nutrients must be sent to all parts of the body from the top of the head to the palm of the foot. Digestion of the food you eat requires energy (calories)— digesting foods with high and low heat density requires more energy than high calorie foods. Your body must generate heat to maintain life (you are a bloody animal), and must also actively or pass away body waste (such as when exhaling, carbon dioxide must be exhaled, the food residue produced by digestion needs to be cleared, and the excess water needs to be discharged through sweat and urine). If the calories consumed are much more than needed, the excess energy will be stored in the form of fat.