Table 4 20 metre shuttle run results in Tanzanian 9 and 10 year old schoolchildren: number of levels completed, final speed, and estimated maximal oxygen uptake (V̇O_2max).

Sex		n		Levels (no.)		Final speed (km/h)		V̇O2max (ml·kg−1·min−1)
Boys		121		8.4 (8.2 to 8.6)		12.2 (12.1 to 12.3)		57.5 (56.9 to 58.0)
Girls		152		7.3 (7.1 to 7.5)		11.6 (11.5 to 11.7)		54.8 (54.3 to 55.3)
Total		273		7.8 (7.6 to 7.9)		11.9 (11.8 to 12.0)		56.0 (55.6 to 56.4)