Nutritional, Metabolic, Endocrine
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: Inclusion criteria required a minimum of eight years of competitive experience, a criterion operationally defining elite athletic status, an intermediate chronotype verified by the Horne-Östberg Morningness-Eveningness Questionnaire , and habitual sleep duration of 7.5 ± 0.5 hours assessed over one month using the Bastuji-Jouvet sleep diary.
Exclusion criteria
Exclusion criteria: Participants were excluded if they: reported musculoskeletal injuries, diagnosed sleep disorders, any current pharmacological treatment.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Objective sleep was measured continuously using a triaxial accelerometer worn on the non-dominant wrist with data processed in ActiLife software. Bedtime and wake-time epochs were defined using sleep diary entries. Extracted variables included Sleep Onset Latency (SOL), Wake After Sleep Onset (WASO), Total Sleep Time (TST), and Sleep Efficiency (SE = TST / time in bed × 100). subjective sleep quality was assessed on Days 1, 4, and 7 of each condition using the Spiegel Sleep Quality Perception Questionnaire (SSQ; Spiegel, 1984; total score 0–30), and daily through the Consensus Sleep Diary. Subjective diary entries served exclusively to define actigraphy epoch boundaries for sleep period identification; subjective diary-derived indices (SOL, TST, WASO, SE, and SSQ) were not subjected to independent statistical analysis in the present study, as no separate diary scoring dataset was available. | — |
Secondary
| Measure | Time frame |
|---|---|
| Cognitive assessments / Simple Reaction Time (SRT) and Choice Reaction Time (CRT) were measured using OpenSesame software, with 20 consecutive trials per session and variable preparatory intervals (200-1400 ms) to limit anticipatory responding. Mean reaction time (ms) was retained for analysis. Executive function was evaluated using the Trail Making Test Parts A (TMT-A) and B (TMT-B), with completion time recorded in seconds. The TMT B-A difference score served as a processing-speed-independent index of cognitive flexibility. Sustained attention and visual discrimination were quantified using the Digit Cancellation Test (D-CAT;, scored as total correct responses. Cognitive inhibitory control was assessed using the three-component Stroop paradigm: word reading, color naming, and color-word interference. Interference indices (M/C and I/C) were computed as the ratio of interference time to color-naming and word-reading times, respectively | — |
Countries
Tunisia
Contacts
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