Bolt 9.58!!!!

[Charlie_Francis]

@NumberTwo

In some cases, locking the elbow makes it more difficult to pick the hand up off the track for your first movement (i.e. the hand flick up off the track should initiate movement at the start). For someone who is less strong (i.e. able to hold position), locking the elbow may steady the athlete. Again, it is an individual thing.

I agree with this analysis.