1. Department of Human Ecology; Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Cinvestav)-Unidad Mérida; 97310 Merida Yucatan Mexico
2. Facultad de Matemáticas; Universidad Autónoma de Yucatán; Mérida Yucatán México
3. Centre for Global Health and Human Development; School of Sports, Exercise and Health Sciences, Loughborough University; Loughborough LE11 3TU United Kingdom