Bunker · Changes the swing

Line in the sand

Setup in 3D
3D view
Setup from above
From above

Draw a line in the sand. Make swings that enter the sand on the line, moving along it. Then put balls a few centimetres in front of the line.

Trains
Bunker, Low point
Dose (suggestion)
10 swings, then 10 balls
Count
Entries on or just behind the line, out of N
Stop signal
Stop: pain 3 out of 10 or more, pain spreading into an arm or leg, numbness, or more pain the next morning.
Source
Golf Compendium: The line drill in bunkers