Pediatric exercise science · 2026
Comparison Between Cross-Sectional and Longitudinal Data for Changes in Anthropometric and Performance Parameters From 11 to 17 Years Old in Japanese Male Speed Skaters.
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Kumagawa Daisuke, Imawaka Taro, Nosaka Kazunori
Аннотация
PURPOSE: The present study compared cross-sectional (CS) and longitudinal (LT) data for changes in anthropometric and performance parameters in junior speed skaters to examine how well the CS data reflects individual LT changes.
METHODS: The CS data consisted of 404 Japanese male skaters of 11 (n = 60), 12 (n = 67), 13 (n = 73), 14 (n = 69), 15 (n = 53), 16 (n = 40), and 17 years (n = 42) taken between 2004 and 2019. The LT data followed 11 other male skaters whose 6 consecutive year (11-17 y) data were available. Outcome measures included height, body mass, body mass index, lower limb circumferences, muscle thicknesses, maximal anaerobic power during 10-second maximal bicycle pedaling, peak speed in slide bord skating, and average ice-skating speed in 500 m.
RESULTS: The average values of the measures were not different (P = .795-.999) between the CS and LT data at any age (eg, body mass index: 21.7 [2.0] vs 22.3 [2.3] kg/m2; anterior thigh muscle thicknesses: 60.5 [5.1] vs 60.5 [4.5] mm; maximal anaerobic power: 1022 [141] vs 1026 [164] W; average ice-skating speed in 500 m: 12.5 [0.4] vs 12.5 [0.4] m/s at 17 y). Changes in the measures from 11 to 17 years were not different (P = .750-.998) between the CS and LT data.
CONCLUSION: These findings suggest that the CS data approximate individual developmental trends, when cohort bias is adequately controlled, but cannot substitute for LT analyses.
METHODS: The CS data consisted of 404 Japanese male skaters of 11 (n = 60), 12 (n = 67), 13 (n = 73), 14 (n = 69), 15 (n = 53), 16 (n = 40), and 17 years (n = 42) taken between 2004 and 2019. The LT data followed 11 other male skaters whose 6 consecutive year (11-17 y) data were available. Outcome measures included height, body mass, body mass index, lower limb circumferences, muscle thicknesses, maximal anaerobic power during 10-second maximal bicycle pedaling, peak speed in slide bord skating, and average ice-skating speed in 500 m.
RESULTS: The average values of the measures were not different (P = .795-.999) between the CS and LT data at any age (eg, body mass index: 21.7 [2.0] vs 22.3 [2.3] kg/m2; anterior thigh muscle thicknesses: 60.5 [5.1] vs 60.5 [4.5] mm; maximal anaerobic power: 1022 [141] vs 1026 [164] W; average ice-skating speed in 500 m: 12.5 [0.4] vs 12.5 [0.4] m/s at 17 y). Changes in the measures from 11 to 17 years were not different (P = .750-.998) between the CS and LT data.
CONCLUSION: These findings suggest that the CS data approximate individual developmental trends, when cohort bias is adequately controlled, but cannot substitute for LT analyses.