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Table 1 Descriptors of systematic reviews

From: A critical evaluation of systematic reviews assessing the effect of chronic physical activity on academic achievement, cognition and the brain in children and adolescents: a systematic review

Authors

Populationa

Number and design of relevant studies

Author’s conclusions

AMSTAR-2 ratingb

Álvarez-Bueno et al. [23]

Healthy children and adolescents (4–13 years)

26 intervention studies (8 non-RCT)

PA benefits several aspects of academic achievement, particularly maths, reading and composite scores

Critically low (10.5)

Álvarez-Bueno et al. [38]

Healthy children and adolescents (4–18 years)

36 intervention studies (5 non-RCT)

PA benefits several domains of non-executive, executive and meta-cognitive functions and skills, with curricular PE interventions being most effective

Critically low (10.5)

Bustamante, Williams, and Davis [39]

Overweight or obese children and/or adolescents

14 intervention studies (5 non-RCT)

Positive effects on cognitive and neurologic outcomes in high-quality RCTs, but all studies showing neurologic benefits were from the same group

Critically low (4.5)

de Greeff et al. [24]

Primary school children (6–12 years)

14 intervention studies (3 non-RCT)c

Positive effects were found for physical activity on executive functions, attention and academic performance; largest effects are expected for interventions that aim for continuous regular physical activity over several weeks

Critically low (8)

Gunnell et al. [27]

Healthy children (1–17.99 years)

49 RCTc

PA is unrelated or beneficial for cognitive function (incl. academic achievement), brain function and brain structure

Critically low (8)

Haapala [28]

Healthy children and adolescents (7–16 years)

4 RCTc

Review does not support the idea that PA interventions are effective at enhancing academic performance; short intervention times (less than 36 and 64 weeks) have little effect.

Critically low (3.5)

Jackson et al. [40]

Healthy children (7–12 years)

8 RCT

Increased regular physical activity is associated with a small and measurable improvement in neuropsychological tests of executive functions, specifically inhibitory control

Critically low (6.5)

Lees and Hopkins [29]

Children and adolescents (< 19 years)

4 RCT

PA is positively associated with cognition and academic achievement

Critically low (4.5)

Li et al. [30]

Healthy adolescents (13–18 years)

2 intervention studies (1 non-RCT)c

PA effect on cognitive and academic performance is equivocal and limited in quantity and quality

Critically low (5.5)

Lubans et al. [41]

Children (7–11 years)

6 RCT (3 unique studies)

There is a lack of available evidence regarding neurobiological mechanisms

Critically low (5.5)

Martin et al. [31]

Overweight or obese children (3–18 years)

8 RCT

High-quality evidence for composite executive functions, but not academic achievement, attention, cognitive flexibility or inhibition control; however, this evidence is based on a small number of studies

High (16)

Martin and Murtagh [32]

Children (5–12 years)

4 intervention studies(2 non-RCT)

All of the studies (s = 4) reported some positive effects of physically active academic lessons on learning outcomes

Critically low (5.5)

Mura et al. [33]

Healthy children (3–18 years)

28 intervention studies (7 non-RCT)

Positive effects of PA interventions on academic achievement and cognitive performance

Critically low (3.5)

Pucher, Boot, and Vries [34]

School-aged children

4 intervention studies (3 non-RCT)

No negative effects of PA on academic performance and some positive effects

Critically low (5.5)

Singh et al. [25]

Healthy children and adolescents (3–16 years)

11 high-quality intervention studies (3 non-RCT; out of 58 interventions)

Inconclusive evidence for beneficial effects of PA on cognitive or academic performance, but strong evidence for beneficial effects on maths performance

Low (10.5)

Spruit et al. [26]

Children and adolescents (mean age 11–18)

10 intervention studies (3 non-RCT), including dissertations

PA interventions are effective in improving academic performance

Critically low (4.5)

Suarez-Manzano et al. [36]

Children and adolescents with ADHD (6–18 years)

7 intervention studies (1 non-RCT)

Systematic PA (≥ 30 min per day, ≥ 40%, intensity, ≥ three days per week, ≥ five weeks) further improves attention and inhibition

Critically low (4.5)

Vazou et al. [35]

Typically developing children and adolescents (4–16 years)

27 intervention studies (3 non-RCT)

PA interventions have a positive impact on cognition, but more research is needed

Critically low (3.5)

Verburgh et al. [37]

Children and adolescents (6–17), but one study in young adults

5 RCTc

Inconsistent results regarding the effects of exercise on executive functions

Critically low (7.5)

  1. Abbreviations: PA physical activity, PE physical education, RCT randomised controlled trial
  2. aAge range taken from inclusion criteria unless a more specific range was provided
  3. bThe AMSTAR-2 confidence rating (critically low, low, medium or high) is reported, followed by the overall score. The overall score is added to acknowledge the inter-review variability in quality, but is not used in the synthesis of findings as recommended by Shea et al. [22]
  4. cThis review also includes acute PA studies which have been excluded from this count