“Coaches ask me about the key benefit of moving from interval timing, or send-off times with pace clocks, to getting velocities. The answer is precision. When training, athletes and coaches want improvements in mean swimming velocity, not just an indication they are “making the times” or even getting a time. The main point of this article is to value mean velocity, measure it, and then improve it. Just getting the total duration of the swim distance isn’t going to work anymore….” By Carl Valle