Effect of Angle of View and Partial Sleep Deprivation on Distance Perception

The present study aimed to investigate the effects of intensive effort on egocentric distance perception according to different angles of view after a sleep deprivation at the beginning (SDB) or at the end (SDE) of the night and after a normal sleep night (NNS)). Ten male soccer players (age 22.8±1.3 years; body mass 72.0±10.4 kg; body height 180.0±3.0 cm) performed a repeated-cycling-exercise (RS) (10×6-s maximal cycling with 24-s in-between) after SDB, SDE and NNS. They were asked to estimate three distances (i.e., 15m, 25m and 35m) before and after RS from different angles of view (i.e., in front (0°) and in side (45° left and 45° right)). For the 35m, distance estimation was better during NNS compared to SDB and SDE for the front and the two side angles either before or after RS (p<0.05). Concerning the 25m, distance estimation was better after compared to before RS for the front angle during the NNS session (p<0.05). For 15m, distance estimation was better during NNS than SDB and SDE for the front and the both side angles after RS (p<0.05). We concluded that partial sleep deprivation negatively affected the estimation of the egocentric distance for the three angles of view either at rest or after RS exercise.