A student measured a swimmer's rate of oxygen uptake at different swimming speeds. The results are shown in Table 1.
Table 1
| Activity | Swimming speed (m/sm/sm/s) | Oxygen uptake (cm3/mincm^3/mincm3/min) |
|---|---|---|
| Resting | 0.0 | 250 |
| Slow swimming | 0.5 | 1600 |
| Fast swimming | 1.0 | 2800 |
Explain the trend shown in Table 1.