A mechanical speedo-meter to assess swimmer’s horizontal intra-cyclic velocity: validation at front-crawl and backstroke

1,3,6 Wellington G Feitosa, Mário J Costa, Jorge E Morais, Nuno D Garrido, António J Silva, Antonio B Lima, Tiago M Barbosa Ceará State Univesity, Fortaleza, Brazil Polytechnic Institute of Bragança, Bragança, Portugal University of Trás-os-Montes and Alto Douro, Vila Real, Portugal National Institute of Education, Nanyang Technological University, Singapore Ceará Federal University, Fortaleza, Brazil Research Center in Sports, Health and human Development, Vila Real, Portugal