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Table 1 Physical characteristics, fitness and physical activity levels at age 15y, and at young adulthood (mean age 22.0y).

From: Tracking of physical activity, fitness, body composition and diet from adolescence to young adulthood: The Young Hearts Project, Northern Ireland

  Males Females
  Baseline Follow-up Baseline Follow-up
  n Mean SD n Mean SD n Mean SD n Mean SD
Weight (kg) 245 59.2 8.9 245 75.5*** 11.5 231 56.9 9.1 231 64.3*** 11.7
Height (m) 245 1.70 0.07 245 1.78*** 0.07 231 1.62 0.06 231 1.64*** 0.06
Body mass index (kgm-2) 245 20.4 2.4 245 23.8*** 3.1 231 21.7 3.2 231 23.8*** 4.1
Biceps skinfold (mm) 245 4.73 2.23 244 5.54*** 3.42 231 8.00 2.92 230 9.57*** 5.27
Triceps skinfold (mm) 245 9.21 4.59 244 10.28** 5.41 231 15.97 4.49 230 17.84*** 5.94
Subscapular skinfold (mm) 245 7.75 3.75 244 12.94*** 5.22 231 11.57 4.77 230 15.14*** 6.17
Suprailiac skinfold (mm) 245 10.30 6.58 244 15.87*** 7.43 231 14.08 5.73 230 16.01*** 6.98
Sum of skinfolds (mm) 245 32.00 16.07 244 44.63*** 18.76 231 49.61 15.62 230 58.56*** 20.76
VO2maxa 241 52.07 5.96 225 38.93*** 8.70 228 41.05 5.48 212 26.90*** 5.43
Physical activity scoreb 242 28.27 14.44 243 7.95 1.38 227 17.71 12.59 229 7.40 1.20
  1. a VO2max at age 15y was derived from the number of 20 metre shuttle run laps completed by each subject. At follow-up, VO2max was extrapolated from the results of a cycle ergometer test (Physical Work Capacity at a heart rate of 170 bpm; PWC170).
  2. b Physical activity scores at age 15y were calculated according to the method of Riddoch et al (1991). At follow-up, a modification (Pereira et al, 1997) of the Baecke questionnaire was used. At age 15y, the maximum possible activity score was 100, while at follow-up, scores could range from 3–15.
  3. For each sex, differences between variables measured at age 15y and young adulthood were assessed using paired t-tests. *** P < 0.001 ** P < 0.01.