Full swing · Changes the swing

Toe up to toe up (9 to 3)

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

7-iron. Swing halfway back, to 9 o'clock, and check that the toe of the club points at the sky. Hit the ball and shorten the follow-through so your hands finish at 3 o'clock, with the toe pointing at the sky again.

Trains
Push, Slice, Pull, Hook
Dose (suggestion)
3 sets of 10 balls
Count
Swings with the toe up at both 9 and 3, 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.com: Fix your release and hit your irons a full club longer