## 4 Discussion
However, it has also been shown that vigorous physical activity may be more beneficial than moderate physical activity in reducing waist circumference and visceral adiposity; however, this was observed in adults who are overweight or obese [64]. Thus, the tracking of food intake in our study is not related to a more healthy weight because, according to the BMI categories [65], participants who tracked their food intake were almost overweight (BMI between 25 and 29.9), while those participants who did not (median: 23.6 (Q1: 21.5-Q3: 26.7)), stayed not-so borderline of the normal BMI category (between 18.5 and 24.9). This is in agreement with the results of a recent review, which found that the effectiveness of multicomponent technologically mediated interventions for weight management in obesity showed promising results; however, the isolated use of an app received presumably less positive outcomes [66]. A recent review of intervention studies using smartphone apps has analyzed the effects on anthropometric, metabolic, and dietary outcomes. It has highlighted weight loss in adults being overweight and obese for 3 and 12 months, although with minimal long-term effectiveness [67]. A recent study on overweight or obese adults, who were advised to self-monitor their dietary intake for 8 weeks with an app, has found that if the frequency of self-monitoring was consistent, weight loss could be achieved in the short term [68]. Another recent study has shown that using tailored weight and calorie goals provided by professionals to track a person's food intake with a mobile app can produce clinically significant weight loss [69]. Thus, by only using the isolated online tracking of food intake, the maintenance of a healthy weight does not seem to be effective, though, previously, it has been shown that electronic dietary records were better than traditional methods for BMI reduction [49]. However, if there is professional support, the results improve. Anteriorly, it has been stated that in order to progress to healthy dietary behaviors, having simple knowledge of the facts is not enough. It would be necessary to develop favorable convictions towards alimentation [70] and have the professional support of a dietitian's skills to obtain behavioral change and sustainable weight reduction [71]. In fact, app users have declared that having professional support for using the apps may be interesting [39]. It has been demonstrated that a combination of care with digital apps-based tools and support by health professionals is effective for healthy weight achievement [72]. The factors included in these interventions, which conditioned the best results in weight management, were as follows: self-management, particularly in the first phases of the interventions; early education in nutrition and diet; and totally online support messages from health professionals [72]. Participants who used meal tracker platforms of any type not only had higher BMIIs but also invested more hours a week on Instagram when looking over nutrition or physical activity (median: 2.0 (Q1: 1.0-Q3: 4.0), \(p=0.028\)). The time of social media consumption has been shown to be correlated to the augmented sitting time on non-business days [73], and a higher BMI has been associated with more time spent sitting [74]. It might be supposed, however, that these almost-overweight participants sought help via technology or apps to track their food intake, and information on the web to try to achieve a healthier weight. It seems that they were aware of the benefits of a healthy weight and turned to new technologies in search of support to achieve it. This is a fact that might be confronted by health professionals, given that it might show that health services are not offering all the necessary support to educate populations in healthy nutritional behavior or that people even prefer not to consult health professionals because they might feel stigmatized [75].