Fig 1.
Flow chart describing the study participants.
Table 1.
Characteristics of the participants at each measurement point by sex.
Fig 2.
Development of cardiorespiratory fitness.
(A) Development of maximal power output (Max W). (B) Development of maximal power output relative to kg lean mass (W/kgLM). *Significant difference between the sexes. †Significant difference from previous measurement. P values were obtained with a post-hoc test with Bonferroni correction.
Table 2.
Spearman’s rank correlation coefficients for W/kgLM for all age comparisons between ages 7, 9, 15, and 17.
Fig 3.
Percent of participants remaining in the low, moderate, or high category for W/kgLM.
(A) From baseline age 7. (B) From baseline age 9. (C) From baseline age 15. Each box represents the percent of participants in each category at baseline who remained in the same category at follow-up.
Table 3.
Odds for having high CRF at follow-up for those with high CRF at baseline, relative to those with low or moderate CRF at baseline, for all age comparisons between ages 7, 9, 15, and 17.