Body-image and -size perception after a single session of HIIT body work in healthy adult men
Roberta Luksevicius Rica,1, 2[*], João Marcelo de Queiroz Miranda1, Alexandre Fernandes Machado1, Alexandre Lopes Evangelista3, Cauê Vazquez La Scala Teixeira4, Eliane Florencio Gama1, Graça Pinto5, Victor Machado Reis5, Danilo Sales Bocalini6
1Programa de Pós-Graduação em Educação Física, Universidade São Judas Tadeu, São Paulo, SP, Brasil.
2Universidade Cidade de São Paulo. Grupo de Estudo em Pedagogia do Esporte e Movimento. São Paulo, SP, Brasil.
3Universidade Nove de Julho. Departamento de Educação, Curso de Educação Física, São Paulo, SP, Brasil.
4Faculdade Praia Grande. Faculdade de Educação Física, Praia Grande, SP, Brasil.
5Universidade de Trás-os-Montes e Alto Douro. Centro de Investigação em Desporto, Saúde e Desenvolvimento Humano, CIDESD, Vila Real, Portugal
6Universidade Federal do Espírito Santo. Laboratorio de Fisiologia e Bioquimia Experimental do Centro de Educação Física e Desporto, Vitória, ES, Brasil.
]]> ABSTRACT
It was our objective to analyze the effects of a single session of whole body HIIT on body-image and -scheme parameters of healthy adult men. Twenty-one active, healthy adults performed high-intensity intermittent training based on full body exercise. The training session involved 20 sets of 30 second all-out exercise and 30 seconds of passive recovery between sets. All subjects underwent blood lactate measurement, rate of perceived exertion, feeling scale and body image assessment and perception of body size measurements. Significant differences (p<0.001) were found on blood lactate but not in feeling scale. The values of current and adequate silhouette did not differ between each other and the real silhouette. Significant differences were found on Image Marking Procedure (IMP) (p< 0.003). Additionally, significant differences (p= 0.009) were found on prevalence of adequate, hypoeschematic and hypeschematic. Although alteration was not found on self-perception of body image, a single session of HIIT body work promoted alteration on body size perception in healthy adult men.
Keywords: whole-body, HIIT, body scheme, body image.
Introduction
Body perception (BP) can be conceptualized as the integration of sensory, conceptual and idea information that the subject has about their body in a dynamic process that inter-relates the body with the environment (De Vignemont, 2010). To Ivanenko et al. (2011), the perception of the dimensions of the body and its segments is essential to adequate movement in space. In addition, it is also necessary to perceive the position of each segment and the body as a whole, to elaborate a program of action and to recognize the position of the body in relation to space and movable and immovable objects (Ivanenko et al. 2011). Studies (Tsakiris et al., 2005; Tsakiris, Prabhu & Haggard, 2006) suggest that tactile stimulation, passive movement and active movement are important sources of stimulus for the development of the body perception; however, sensorial information contributes with the construction of representations of individual parts of the body while the active movement contributes with an overall corporal representation. This information suggests that BP, as a whole, depends fundamentally more on the movement and on the sensation (Tsakiris et al., 2005; Tsakiris, Prabhu & Haggard, 2006). In addition to being one of the important elements in the construction of body representation, participation in regular physical activity is associated with benefits in the variation of health status (Coratella & Schena, 2016; Distefano et al., 2013).
Among the currently available physical activity strategies, high intensity interval training (HIIT) has been considered an efficient approach to reduce cardiometabolic risk (Falcone et al., 2015; Shaban, Kenno & Milne, 2014) and increase in sports performance (Naimo et al., 2015). Recently, Machado et al. (2017) proposed the use of exercises using whole body in HIIT (HIIT body work) programs. According to Thompson (2017) the training programs using body weight have been identified as a strong trend in recent years, mainly for providing independence for exercise performance, low operating cost and freedom of three-dimensional movement. Previous studies (Bellenger et al., 2016; Gist et al., 2015;) have suggested that HIIT body work offers physiological benefits similar to those observed in traditional HIIT protocols.
Although, physical activity has been considered a key element of health promotion and improvement of overall physical fitness as well as an approach to increase body self- knowledge, self-esteem, self-perception and effectiveness, which are important factors for a positive body image in different populations (Bizerra & Gama 2017; Fonseca et al., 2014; Pereira & Gama, 2017; Rica et al., 2018a; Rica et al., 2018b). However, to the best of our knowledge, there is a paucity of information between HIIT and self-perception of body image. Thus, the aim of this study was to evaluate the influence of a single session of HIIT body work in self-perception of body image in adult men.
Method
Participants
]]> After the approval of the São Judas Tadeu University Research Ethics Committee (nº 1.738.246/2016), a consent document was signed by twenty healthy adult men (28 ± 5 years), who were physically independent and volunteered to participate in this study. The following parameters were used as exclusion criteria: positive clinical diagnosis of diabetes mellitus, smoking, musculoskeletal complications and/or cardiovascular alterations confirmed by medical evaluation. All the procedures were in accordance with the ethical standards of the responsible committee on human experimentation (institutional or regional) and with the Helsinki Declaration of 1975, as revised in 1983.Procedures
A single acute bout of high-intensity interval training based on full body exercise was performed according previously studies (Machado et al., 2018a; Machado et al., 2018b). Briefly, the training session involved a 5 min warm-up followed by 20 sets of 30 seconds of all- out exercise and 30 seconds of passive recovery between sets, totaling 25 minutes of exercise. The following exercise order (5 sets for each exercise) was used for the jumping jack, burpee, mountain climb and squat jump.
Height was measured by a Cardiomed (WCS model) stadiometer, with an accuracy of 115/220 cm. The measurement was performed with the cursor at an angle of 90° with the patient in a standing position with feet together in contact with the Stadiometer. The subjects were instructed to stay in inspiratory apnea, with the head parallel to the ground. Total body mass was measured by a calibrated Filizola electronic scale (Personal Line Model 150) with a 100g scale and a maximum capacity of 150 kg. Body mass index (BMI, kg/m2) was calculated using the equation BMI = weight/height2. The general sample characteristic parameters assessed are described in Table 1.
The total exercise movement amount realized for each set was used as external training load, as suggested by Machado et al. (2017a) and utilized in other studies (Machado et al. 2018a, Machado et al., 2018b). The number of movements realized for each set were counted and summed at final exercise session.
Capillary blood samples were taken from a sterile fingertip using a sterile lancet before and after the exercise session according to previous publication of our group (Machado et al., 2018a; Machado et al., 2018b). The first drop of blood was discarded, and freeflow blood was collected in glass capillary tubes. All blood samples (25 ml) for lactate analysis were evaluated using an Accutrend® (Roche - Basel, Switzerland) lactate analyzer.
Subjects reported their rating of perceived exertion (RPE) using a Borg (0-10 scale) after a single session of HIIT body work according previously studies (Machado et al., 2018a; Machado et al., 2018b). To guarantee that the RPE mean data obtained refers to the total training, subjects were asked to answer a question 20 to 30 minutes after the end of the session: “How was your training today”?
]]> The body-image and -satisfaction was analyzed utilizing previously study (Kakeshita et al, 2009). This task consists of 12 silhouettes on a progressive scale, been the discrepancy between the current (CS) and ideal silhouettes (IS) was analyzed after the figures were presented to the subjects. According to study of four group (Rica et al. 2018a) the following questions were directed to the men: (1) What is the silhouette that best represents your current physical appearance? (2) What silhouette would you like to have?Body schema was measured according to previously publications (Fonseca et al., 2012). Briefly, using the Image Marking Procedure (IMP), evaluation was made through the sense of touch at certain spots. Before and after whole body HIIT single session, all participants were marked with masking tape on the right and left acromioclavicular joint, right and left waist curves, and greater trochanter of the right and left femur with green, blue, red, and black round stickers to ensure that the same points were always touched by the researcher in all three trials. Participants remained in standing position near a wall. The wall had a measuring tape placed vertically for the researcher's use as reference. The test was performed blindfolded. The researcher touched the points marked on the participant’s body and the participants had to point the orthogonal projection of the touched point on the wall. The researcher marked each indicated point with a colored label. The first point touched was the top of the head, followed by the right shoulder, waist, and hip, and then the left shoulder, waist, and hip. The test was repeated three times, and the participant could not see the previous markings. After collecting the perceived measurements, the examiner guided the individual close to the wall, so that the anterior foot alignment was maintained. In this position, the marking of veridical heights of body points was performed using the measuring tape. The labels and measuring tape on the wall were photographed with a digital camera for further analysis using AxioVision Version 3.1.
The quantitative analyses of IMP were evaluated by distances of the points identified by the subject and the evaluator for body height and width in the horizontal plane. Data were organized in tables and the overall body perception index (BPI) was calculated. First, the BPI of each region was analyzed. From the three attempts of perceived measures for each region, perceived size was calculated as the mean response divided by actual measurement, multiplied by 100. Overall BPI (oBPI) was calculated as the mean BPI of measurement sites [(head BPI + shoulder BPI + waist BPI + hip BPI) / 4]. Perception was defined as when the actual and perceived measures were very similar, with BPI between 99.4% and 112.3%. Overall body awareness was defined as adequate, i.e., when the perceived measures are very close to the actual measurements, with BPI between 99.4% and 112.3%. When the perceived measure differed from the actual measurement, individuals were classified as hyperschematic (oBPI greater than 112.3%) or as hyposchematic (oBPI less than 99.4%).
Statistical analysis
The D’Agostino-Pearson test was applied to Gaussian distribution analysis. The paired Student’s t-test was performed to compare differences before and after whole body HIIT single session. An alpha of 0.05 was used to determine statistical significance. All data values were expressed as a mean ± standard deviation. All analyses were performed using SPSS software (v 15.0; IBM, Armonk, NY, USA).
Results
The participants presented no injuries as a result of the workout during and after the exercise session. As foreseen, due to high exercise intensity, the values of the rate of perceived exertion (9 ± 1) and total amount of movements (503 ± 123 numbers) were highest. Additionally, the blood lactate concentration increased (953 ± 338 %) after whole body HIIT single session. As shown in Figure 1, significant differences (p<0.001) were found between (Before: 1.22 ± 0.25, After: 12.45 C 3.47; mMol/L) of blood lactate.
]]> The values of actual (Before: 5.95 ± 2.22, After: 5.71 ± 2.53, p= 0.6339) and ideal (Before: 6.04 ± 1.71, After: 5.33 ± 1.90, p= 0.0744) did not differ each other (Figure 2A) and real silhouette (6.09 ± 1.04). Similar results were found (p= 0.3114) on the body satisfaction (Before: -0.09 ± 1.99, After: 0.47 ± 3.31) and prevalence of body satisfaction as showed at Figure 2B.
The values of IMP increase (13.46 ± 17.72 %) after whole body HIIT single session. As showed in Figure 3A significant differences was found (Before: 96.18 ± 11.57, After: 109.65 ± 12.13, p< 0.003), moreover, significant differences (p=0.009) were found on prevalence of body size classification as showed in Figure 3B. Additionally, a significant correlation (p= 0.0073, r= 0.4079) was found on IMP and blood lactate concentration (Figure 3C).
Discussion
With the increase in popularity of HIIT and exercise with body weight, there is a growing need for studies to analyze the effects of interventions that combine the two strategies on the psychobiological variables (Evangelista et al., 2017; Machado et al., 2018a; Machado et al., 2018b; Machado et al., 2018c,). In this study, the main results were no self-perception of body image change, statistical difference on perception of body size and a positive correlation between IMP and blood lactate after HIIT bodywork. To the best of our knowledge, this is the first report to describe self-perception of body-image and - size after HIIT approach in adult men.
]]> In our study the blood lactate concentration, total amount of movement and rate of perceived exertion increased significantly, which has been shown in previous studies (Machado el al., 2018a; Machado et al., 2018c; Evangelista et al., 2017) confirming that this exercise protocol is able to promote fatigue and metabolic acidosis such as other HIIT protocols (Wahl et al., 2010; Nalbandian, Radak & Takeda, 2017).The greatest determinants for negative or positive body image are satisfaction with weight, accuracy of size perception, body satisfaction, appearance evaluation and orientation, body esteem, ideal body, body schema and body awareness (Rica et al., 2018a). Further factors also include sex, age, mean and the relationship of the body with cognitive processes such as cultural and social beliefs, values and attitudes (Rica et al., 2018a; Gardner, 2011). In relationship to body image and exercise, studies have shown improvement on body image after acute (Béres, Czeglédi & Babusa, 2017; Carraro, Nart & Scarpa, 2010) and chronic (Baştuğ et al., 2016; Vocks et al., 2009) protocols. However, no significant differences were found in our study after a single session of HIIT body work. Similar results have been shown in a meta-analysis study by Alleva et al. (2015), with interventions inducing only small improvements in body image and underline the need for large-scale, high- quality trials in this area.
In addition, other important points of view should be addressed for a male sample, exercise modality and session. The silhoute choice by male subjects has been shown to be higher than that of women (Damasceno et al., 2005; Haines & Neumark-Sztainer, 2006). However, in our study no diffeterences were found on current, ideal and real silhouettes, different than others. Additionally, to the best of our knowledge, this is the first study that evaluates body image after whole body HIIT session.
There are few studies (Pereira 2017) that have investigated the influence of high intensity exercises and BP. In our study, the HIIT body work session changed 13.46% on perception of body size, different than that of Pereira (2017), evaluating Cross Fit practitioners after a 9- minute session of high intensity exercises, who evidenced an increase of 3% in the perception of the body. However, unlike the study by Pereira (2017), we showed a significant difference in the classification of body perception. There are reports in the literature that body activities are capable of modifying body dimensional perception (Catalan-Matamoros et al., 2011; Hedlund & Gyllensten, 2010), but using high- intensity exercises, the possible mechanisms still remain scarce.
To Pereira (2017), training can provide neural stimuli necessary to promote the modification of the perception of the dimension after training, mainly by the increase of muscular tone and in regions in which it does not have bony limits or when the musculature undergoes constant stimuli. The findings of previously studies (Tsakiris et al., 2005; Tsakiris, Prabhu & Haggard, 2006) may help us in understanding the data obtained in this study. These studies (Tsakiris et al., 2005; Tsakiris, Prabhu & Haggard, 2006) suggest different mechanisms of body information processing in the primary somesthetic cortex and the primary motor cortex. While the somesthetic cortex corresponds to the representation of a well delimited cutaneous segment, the representations of different parts of the body overlap in the motor cortex. According to Lemon (1998) the primary motor cortex seems to organize itself to represent muscle groups and synergies of movement rather than individual muscles. It is speculated that given the multi-articular and synergistic characteristic of HIIT, a large motor cortical area is stimulated, which may explain the overestimation of body size (hyperskema).
Another possible explanation for the changes in the perception of the dimension can be directed to the acute modifications derived from the practice of exercise, thus, it is possible to hypothesize that the exercises selected in the present study, because they are performed with the whole body and with all-out intensity, can induce systemic changes, especially when associated with metabolic demand. Among the acute mechanisms we can highlight is the hyperemia induced by the exercise. Hyperemia can conceptually be considered as an increase in blood flow in a given region, provided by vasodilation mainly for maintenance of function, nutrition and tissue oxygenation (Joyner & Casey, 2015; Wunsch, Muller-Delp & Delp, 2000), in addition, the magnitude of hyperemia is associated with intensity of the exercise, and thus, of the request of activity and muscular action and metabolic alterations as showed on figure 2C.
Conclusion
The results of present study suggest that although the single session of HIIT body work exercise does not promote self-perception of body image change, it induces alterations on perception of body size in healthy adult men with association of blood lactate concentration.
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Acknowledgments: Nothing to declare.
Conflict of interests: Nothing to declare.
Funding: Nothing to declare.
]]> Manuscript received at April 15th 2016; Accepted at December 8th 2016
[*]Corresponding author: Rua Militão Barbosa de Lima, 56, 09720-420, Centro, SBC, SP, Brasil, email: robertarica@hotmail.com
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