inclination

When we have the idea to start lose weighta very clear scene appears in our minds: run and sweat profusely to burn all the fat faster. However, the ‘secret’ may not be in the speed at which we are walking or running, but rather in the inclination on which a training protocol has even been generated to try to achieve the best results. Although the question is: is there evidence to support it? It has been seen a lot. With a look at social networks, surely at some point you have come across the classic video where it points out that we are doing things very wrong to lose fat. And it is not true that if you only run or walk horizontally it is as if you were not doing anything, but it is true that adopting an incline system, whether on the gym treadmill or with the natural slopes around us, is an interesting strategy. Although it does not stop here, since the protocol 12-3-30which is basically walking at a 12% incline, at 3 miles per hour (which is about 5 km/h) for 30 minutes. The metabolic dilemma. To understand why walking uphill can be better than jogging on the flat, you must first differentiate between total caloric expenditure and percentage of substrate used, that is, where the body gets that energy from. Here, a recent study published in 2025 directly compared the 12-3-30 training with regular, free jogging, and the results showed that, although the same energy was expended, walking with an incline oxidized a greater percentage of fat. In concrete figures, the study details that, consuming the same number of calories, the 12-3-30 protocol extracts 40-41% of its calories from the fat that we want to burn, compared to 33-34% which is achieved by running. Although the trap we have is time, since the 12-3-30 system is less efficient because it takes more minutes to burn the same calories than running at high intensity. Speed ​​is not key. Given the reason why this happens, we have to put ourselves at the point of maximum lipid burning, which is called Fat Max and that is achieved at an average intensity of effort. Something that can clash head on with the idea that the harder we try and the more we reach our maximum limit, the more fat we burn. But the reality is that when you run at the maximum possible intensity, the body needs a quick energy source to be able to meet the demands to which we subject it. That is why you start consuming carbohydrates and not fat, meaning that, although running as hard as possible you burn more calories per minute, the proportion of fat that is ‘destroyed’ is much lower. This way, incline walking keeps us right in that aerobic “sweet zone” where the body has enough time to use fat as its primary fuel. What happens. But it’s not just speed, speed plays a pretty important mechanical role. Here a study focused on the metabolism of women showed that walking with only a 6% inclination It significantly increases energy expenditure and fat oxidation compared to the same flat exercise, even when the perception of effort is the same. The reason is in the muscle fibers. The most important thing to keep in mind is that, by tilting the treadmill, we force the body to make an extra effort against gravity, which alters biomechanics. Muscle activation studies cited by specialized journals show that inclination triggers the recruitment of the quadriceps, the gastrocnemius (the gastrocnemius) and the soleus. That is why this greater demand from the large muscle groups comes from our fat reserves. More benefits. In addition to everything we have said, we must also highlight the sustainability factor. It must be kept in mind that running has a high barrier to entry, since it generates great stress on joints such as the knee, ankles and hips due to the flight phase and the continuous impact against the ground. At the other extreme, we have to walk with an incline, which is a low-impact exercise, since it allows us to raise the heart rate to levels of demanding cardiovascular work without subjecting the joints to that aggressive wear. This translates into having better adherence to exercise, since it is easier to maintain a routine of walking with an incline four days a week for months, than to maintain a routine of running without falling into abandonment due to the inconvenience it generates. In Xataka | Walking 10,000 steps is fine, but science warns: the true antidote to aging is one step