Table 5. Comparison of the validity of %load-intercept (L0)-mean velocity (MV) relationship and %one repetition maximum (1RM)-MV relationship in monitoring training intensity. Testing load %1RM-MV relationship (%) %L0-MV relationship (%) Load 1 10.09 ± 9.05 11.84 ± 10.09# Load 2 6.36 ± 4.75 7.75 ± 5.86# Load 3 6.31 ± 3.69 7.35 ± 3.97# Load 4 3.40 ± 2.92 4.05 ± 3.08 Load 5 2.44 ± 2.90 2.39 ± 2.04 # significantly higher percentage errors compared with %1RM-MV relationship in the give load.