4x100m Race
The sprint relay requires fast explosive starts and lots of changeover practice.
We are not going to deal with the technique of handovers here, just the way you start.
What is important here though is that you practice with your changeover partner, so that
you can put a marker on the track (roughly 5-7m behind your starting position). When the
incoming runner reaches this point, it is your trigger to start running.
Generally, you will use a three point start or a standing start for this,
either is fine - and generally athletes will use the one they are more comfortable with.
Elite athletes often use the three point start, as it is more similar to the
block start, but still allows you to look behind and go when your team mate
reaches the check mark.
Pictures of both methods are opposite.