1. Faculty of HE, South Essex College, Southend on the Sea, United Kingdom;, Email: juaninef@hotmail.com
2. University King Juan Carlos, Madrid, Spain
3. Faculty of Education, Psychology and Sport Science, University of Huelva, Huelva, Spain; and Faculty of Sport Science, University of Extremadura, Cáceres, Spain
4. LABIOMEP, Porto Biomechanics, Laboratory, University of Porto, Porto, Portugal
5. Faculty of Sport Science, University of Extremadura, Cáceres, Spain