The use of oxygen as a possible screening biomarker for the diagnosis of chronic fatigue Fernando Pifarré, Lluís Rosselló, Raúl Hileno, Joan Palmi, Llúcia Bañeres, Antoni Planas, Joan Antoni Prat

Cognitive and neuromuscular influences on perceived effort during a competitive season in futsal Renato R Azevedo, Felipe P Carpes

Reliability and validity of field-based tests for assessing physical fitness in gymnasts Jorge Salse-Batán, Silvia Varela, Adrián García-Fresneda, Carlos Ayán