Performance and changes in skinfold thicknesses induced after three years of intense athletic conditioning in runners who showed an increase in performance (IPR) and runners who showed a decrease in performance (DPR)
| IPR (n = 30) | DPR (n = 7) | |||||
|---|---|---|---|---|---|---|
| Initial measure | After 3 years | p Value | Initial measure | After 3 years | p Value | |
| Data are mean (SD). | ||||||
| ‡Significant differences between runners who improved and decreased their performance runners (p<0.001). | ||||||
| IAAF, International Amateur Athletics Federation; E/T, extremity (triceps, front thigh, medial calf)/trunk (subscapular, iliac crest, abdominal) skinfold ratio. | ||||||
| Performance (IAAF score) | 1032 (74) | 3.1 (2.3) | 0.000 | 1106 (35)‡ | −3.4 (2.8) | 0.018 |
| Weight (kg) | 63.8 (9.9) | 0.6 (2.7) | 0.120 | 59.7 (11.8) | −0.2 (3.7) | 0.499 |
| Triceps skinfold (mm) | 6.9 (2.1) | −0.4 (1.2) | 0.066 | 6.1 (2.1) | 1.3 (1.1) | 0.027 |
| Subscapular skinfold (mm) | 8.2 (2.1) | 0.1 (1.0) | 0.713 | 7.3 (1.2) | 0.5 (0.7) | 0.078 |
| Pectoral skinfold (mm) | 4.8 (1.2) | −0.1 (1.0) | 0.548 | 5.0 (3.2) | −0.5 (3.2) | 0.343 |
| Iliac crest skinfold (mm) | 6.4 (2.4) | −0.9 (2.5) | 0.115 | 5.8 (1.7) | 0.1 (0.7) | 0.666 |
| Abdominal skinfold (mm) | 7.5 (2.3) | −0.5 (1.5) | 0.004 | 7.7 (2.4) | 0.4 (2.2) | 0.665 |
| Front thigh skinfold (mm) | 10.6 (4.3) | −1.6 (1.9) | 0.000 | 9.3 (4.2) | 1.8 (2.3) | 0.018 |
| Medial calf skinfold (mm) | 5.4 (1.0) | −0.9 (0.8) | 0.000 | 4.7 (1.8) | 0.8 (0.5) | 0.006 |
| Sum of six skinfolds (mm) | 44.9 (10.8) | −4.2 (5.6) | 0.000 | 40.9 (10.7) | 4.9 (5.1) | 0.043 |
| E/T | 1.06 (0.32) | −0.08 (0.2) | 0.013 | 0.98 (0.33) | 0.2 (0.3) | 0.097 |