Cardiorespiratory fitness and health in children and adolescents: an overview of systematic reviews with meta-analyses representing over 125 000 observations covering 33 health-related outcomes.

21 Across all outcomes, no unfavourable associations were reported, though several results did not reach statistical significance (eg, body weight, fasting glucose, low-density lipoprotein cholesterol, systolic and diastolic blood pressure, anxiety) 35 42 or were inconsistent in terms of statistical significance in longitudinal vs cross-sectional evidence (eg, body fat percentage statistically significant only in cross-sectional evidence, 42 waist circumference statistically significant only in longitudinal evidence). 35 Table 2 summarises findings for additional health outcomes, where results were expressed using other statistical measures (eg, OR, ES, RR).

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