Open Access
Construct validity and test-retest reliability of the International Fitness Scale (IFIS) in Colombian children and adolescents aged 9-17.9 years: the FUPRECOL study
(PeerJ, 2017) Ramírez Vélez, Robinson; Cruz Salazar, Sandra Milena; Martínez, Myriam; Lusa Cadore, Eduardo; Alonso Martínez, Alicia; Correa Bautista, Jorge Enrique; Izquierdo Redín, Mikel; Ortega, Francisco B.; García Hermoso, Antonio; Ciencias de la Salud; Osasun Zientziak
Background: there is a lack of instruments and studies written in Spanish evaluating physical fitness, impeding the determination of the current status of this important health indicator in the Latin population, especially in Colombia. The aim of the study was two-fold: to examine the validity of the International Fitness Scale (IFIS) with a population-based sample of schoolchildren from Bogota, Colombia and to examine the reliability of the IFIS with children and adolescents from Engativa, Colombia. Methods: the sample comprised 1,873 Colombian youths (54.5% girls) aged 9–17.9 years. We measured their adiposity markers (waist-to-height ratio, skinfold thickness, percentage of body fat and body mass index), blood pressure, lipids profile, fasting glucose, and physical fitness level (self-reported and measured). A validated cardiometabolic risk index score was also used. An age- and sex-matched subsample of 229 schoolchildren who were not originally included in the sample completed the IFIS twice for reliability purposes. Results: our data suggest that both measured and self-reported overall physical fitness levels were inversely associated with percentage of body fat indicators and the cardiometabolic risk index score. Overall, schoolchildren who self-reported “good” or “very good” fitness had better measured fitness levels than those who reported “very poor/poor” fitness (all p < 0.001). The test-retest reliability of the IFIS items was also good, with an average weighted kappa of 0.811. Discussion: our findings suggest that self-reported fitness, as assessed by the IFIS, is a valid, reliable, and health-related measure. Furthermore, it can be a good alternative for future use in large studies with Latin schoolchildren from Colombia.
Open Access
Top 10 international priorities for physical fitness research and surveillance among children and adolescents: a twin-panel Delphi study
(Springer, 2022) Lang, Justin J.; Zhang, Kai; Agostinis-Sobrinho, César; Andersen, Lars Bo; Basterfield, Laura; Berglind, Daniel; Blain, Dylan O.; Cadenas-Sánchez, Cristina; Cameron, Christine; Carson, Valerie; Colley, Rachel C.; Csányi, Tamás; Faigenbaum, Avery D.; García Hermoso, Antonio; Queiroz Ferreira Gomes, Thayse Natacha; Gribbon, Aidan; Janssen, Ian; Jurak, Gregor; Kaj, Mónika; Kidokoro, Tetsuhiro; Lane, Kirstin N.; Liu, Yang; Löf, Marie; Lubans, David R.; Magnussen, Costan G.; Manyanga, Taru; McGrath, Ryan; Mota, Jorge; Olds, Tim; Onywera, Vincent O.; Ortega, Francisco B.; Oyeyemi, Adewale L.; Prince, Stephanie A.; Ramírez Vélez, Robinson; Roberts, Karen C.; Rubín, Lukáš; Servais, Jennifer; Silva, Diego Augusto Santos; Silva, Danilo R.; Smith, Jordan J.; Song, Yi; Stratton, Gareth; Timmons, Brian W.; Tomkinson, Grant R.; Tremblay, Mark S.; Wong, Stephen H. S.; Fraser, Brooklyn J.; Ciencias de la Salud; Osasun Zientziak
Background The measurement of physical ftness has a history that dates back nearly 200 years. Recently, there has been an increase in international research and surveillance on physical ftness creating a need for setting international priorities that could help guide future eforts. Objective This study aimed to produce a list of the top 10 international priorities for research and surveillance on physical ftness among children and adolescents. Methods Using a twin-panel Delphi method, two independent panels consisting of 46 international experts were identifed (panel 1=28, panel 2=18). The panel participants were asked to list up to fve priorities for research or surveillance (round 1), and then rated the items from their own panel on a 5-point Likert scale of importance (round 2). In round 3, experts were asked to rate the priorities identifed by the other panel. Results There was strong between-panel agreement (panel 1: rs=0.76, p<0.01; panel 2: rs=0.77, p<0.01) in the priorities identifed. The list of the fnal top 10 priorities included (i) “conduct longitudinal studies to assess changes in ftness and associations with health”. This was followed by (ii) “use ftness surveillance to inform decision making”, and (iii) “implement regular and consistent international/national ftness surveys using common measures”. Conclusions The priorities identifed in this study provide guidance for future international collaborations and research eforts on the physical ftness of children and adolescents over the next decade and beyond.
Open Access
Validity and reliability of the international fItness scale (IFIS) in preschool children
(Taylor & Francis, 2022) Sánchez López, Mairena; García Hermoso, Antonio; Ortega, Francisco B.; Moliner-Urdiales, Diego; Labayen Goñi, Idoia; Castro Piñero, José; Benito, Pedro J.; Vicente Rodríguez, Germán; Sanchís Moysi, Joaquín; Cantallops, Jaume; Artero, E. G.; Martínez Vizcaíno, Vicente; Ciencias de la Salud; Osasun Zientziak
Objectives Examine the validity and reliability of parent-reported International FItness Scale (IFIS) in preschoolers. Method A cross-sectional study of 3051 Spanish preschoolers (3-5 years). Fitness was measured by PREFIT battery and reported by parents using an adapted version of the IFIS. Waist circumference was evaluated, and the waist-to-height ratio (WHtR) was calculated. Seventy-six parents of randomly selected schoolchildren completed the IFIS twice for a reliability assessment. Results ANCOVA, adjusted for sex, age and WHtR, showed that preschoolers who were scored by their parents as having average-to-very good fitness had better levels of measured physical fitness than those preschoolers who were classified as having very poor/poor fitness levels (18.1laps to 22.1laps vs 15.6laps for cardiorespiratory fitness; 6.6 kg to 7.5 kg vs 5.3 kg for muscular fitness-handgrip-; 71.7 cm to 76.4 cm vs 62.0 cm for muscular fitness-standing long jump-; 17.2s to 16.2s vs 18.2s for speed/agility; and 11.2s to 15.6s vs 8.7s for balance; p < 0.001). The weighted kappa for concordance between parent-reported fitness levels and objective assessment was poor (kappa <= 0.18 for all fitness measures). Overall, the mean values of the abdominal adiposity indicators were significantly lower in high-level fitness categories reported by parents than in low-level fitness categories (p < 0.05). The test-retest reliability ranged from 0.46 to 0.62. Conclusions The reliability of the parent-reported IFIS are acceptable, but the concordance between parents reported and objectively measures fitness levels is poor, suggesting that parents' responses may not be able to correctly classify preschoolers according to their fitness level.

García Hermoso, Antonio

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