Fig. 2 | Scientific Reports

Fig. 2

From: Population-based trends and distributional characteristics in sit-ups performance among school-aged girls in urban China over three decades

Fig. 2The alternative text for this image may have been generated using AI.

Means, standard deviations and fitted lines of 1-minute sit-ups performance among urban Chinese girls aged 7–18 years from 1985 to 2019 by age. The dots represent the means and the dashed line represents the fitted lines. The best-fitting/most parsimonious sample-weighted regressions (linear or quadratic or cubic regressions) were performed.

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