"Encephalapp Stroop": Validity and reliability of a smartphone app to measure cognitive performance in physically active subjects.

This study aimed to analyze the validity and reliability of a smartphone app (i.e., Encephalapp Stroop) to measure cognitive performance.

Characterization of sleep quality in Brazilian Jiu-Jitsu fighters.

Introduction: Sleep quality can positively or negatively influences the physical performance of Brazilian Jiu-Jitsu fighters; however, the literature does not indicate whether the sleep quality of these fighters is good or poor.

Objective: Characterization of the sleep quality of Brazilian Jiu-Jitsu (BJJ) fighters, stratifying by weight category and color belts.

Material And Methods: A descriptive study that featured with 175 BJJ fighters, the Pittsburgh Sleep Quality Index (PSQI) was applied to assess sleep quality.