{
  "type": "fact",
  "url": "https://karelbusta.dev/data/sleep/kids-told-to-sleep-more-for-100-years",
  "title": "For over a century, experts have told kids to sleep about 37 minutes more than they do",
  "claim": "Across 32 sets of children's sleep recommendations published from 1897 to 2009, recommended sleep exceeded children's actual sleep in 144 of 173 matched comparisons (83%), by 37 minutes on average. Recommendations fell by 0.71 min a year, almost exactly as fast as actual sleep (0.73 min a year).",
  "description": "Sleep advice for children fell about 70 minutes over the 20th century, tracking actual sleep, yet always asked for ~37 minutes more.",
  "confidence": "single study",
  "published": "2026-10-14",
  "context": "Every age group saw recommended sleep decline, and the advice tracked whatever children were already getting. The authors found that \"a lack of empirical evidence for sleep recommendations was universally acknowledged\" by the guidelines' own writers, and that each era blamed \"modern life\" and its technologies, from schoolbooks and the cinema to video games and phones. Caveats: actual sleep here is self- or parent-reported, which tends to overestimate sleep. Part of the actual-sleep data was simulated from published means and SDs. Only 173 of 360 recommendations could be matched, and the paper counts 32 sets of recommendations in its Results but 35 in its qualitative section. It is also one review. It does not show that children get enough sleep, only that the guidelines have long been set relative to observed sleep rather than from evidence on outcomes.",
  "sources": [
    {
      "authors": "Matricciani LA, Olds TS, Blunden S, Rigney G, Williams MT",
      "journal": "Pediatrics",
      "sampleSize": "32 sets of recommendations (360 age-specific), 173 matched to actual sleep data",
      "title": "Never enough sleep: a brief history of sleep recommendations for children",
      "url": "https://doi.org/10.1542/peds.2011-2039",
      "year": 2012
    }
  ],
  "method": "A systematic review collected published sleep recommendations for children aged 0 to 18 and, separately, reports of children's actual total sleep time. Recommendations were recorded for each year of age. Actual sleep was self- or parent-reported and was matched to each recommendation by age, sex and country, within 5 years of the guideline's date (or 10 years if data were scarce). Where only means and SDs were published, the authors used Monte Carlo simulation to generate pseudo-data. Age-adjusted recommended sleep was regressed on the year of the recommendation, and recommended versus actual sleep was compared with paired t-tests. The authors also ran a thematic analysis of the reasons each source gave for its recommendation.",
  "chart": {
    "data": [
      {
        "label": "0",
        "value": -2.44
      },
      {
        "label": "1",
        "value": -0.68
      },
      {
        "label": "2",
        "value": -0.56
      },
      {
        "label": "3",
        "value": -0.73
      },
      {
        "label": "4",
        "value": -0.98
      },
      {
        "label": "5",
        "value": -1.17
      },
      {
        "label": "6",
        "value": -0.87
      },
      {
        "label": "7",
        "value": -0.84
      },
      {
        "label": "8",
        "value": -0.76
      },
      {
        "label": "9",
        "value": -0.42
      },
      {
        "label": "10",
        "value": -0.31
      },
      {
        "label": "11",
        "value": -0.2
      },
      {
        "label": "12",
        "value": -0.05
      },
      {
        "label": "13",
        "value": -0.32
      },
      {
        "label": "14",
        "value": -0.38
      },
      {
        "label": "15",
        "value": -0.45
      },
      {
        "label": "16",
        "value": -0.32
      },
      {
        "label": "17+",
        "value": -0.27
      }
    ],
    "note": "Table 2 (\"Rates of change in sleep recommendations for children according to age group\"), rate-of-change column. All children: −0.71 min/yr (n = 360). Changes were significant only at ages 0, 4–8, 14 and 15. The 37-minute gap, 144 of 173 and 0.73 min/yr are from the Results text.",
    "title": "Change in recommended sleep, 1897–2009, by child's age",
    "type": "column",
    "unit": "min/yr",
    "x": "label",
    "xLabel": "Age of child (years)",
    "y": "value",
    "yLabel": "Rate of change in recommended sleep (minutes per year)"
  },
  "dataset": null,
  "ranking": null,
  "related": [
    "https://karelbusta.dev/data/sleep/sleep-duration-has-not-declined",
    "https://karelbusta.dev/data/sleep/hunter-gatherers-sleep-less",
    "https://karelbusta.dev/data/sleep/latest-bedtime-at-20",
    "https://karelbusta.dev/data/sleep/melatonin-use-rose-fivefold"
  ]
}