Table 1.

Description of the six sleep parameters evaluated through actigraphy and the three subjective parameters of sleep quality, daytime tiredness, and daytime sleepiness in soccer players.

Objective and subjective sleep parameters	Parameters description
Time in Bed (TB, minutes)	The amount of time spent in bed attempting to sleep between bedtime and get up time.
Sleep Latency (SL, minutes)	The period of time between bedtime and sleep onset time.
Sleep Efficiency (SE, %)	The percentage of time in bed that was spent asleep.
Wake After Sleep Onset (WASO, min)	The amount of time spent awake after sleep has been initiated.
Immobility Time (IT, %)	The total time, expressed in percentage, spent without recording any movement during time in bed.
Fragmentation Index (FI, %)	Sum of mobility and immobility accesses in 1 min, divided by the number of immobility accesses.
Subjective Sleep Quality (1-to-10 point scale)	Subjective value of sleep quality in a scale from 0 = very poor sleep quality, to 10 = optimal sleep quality.
Subjective Daytime Tiredness (1-to-10 point scale)	Subjective value of daytime tiredness in a scale from 0 = not at all tired, to 10 = extremely tired.
Subjective Daytime Sleepiness (1-to-10 point scale)	Subjective value of daytime sleepiness in a scale from 0 = not at all sleepy, to 10 = extremely sleepy.