@AndrewKSheaff: Undulation and short-axis pull...
@AndrewKSheaff
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Mar 07, 2026
1
Undulation and short-axis pulling. A visual 🧵.
While limiting undulation can create less drag, doing so too much can compromise the pull.
By lifting throughout the pull, it an allow swimmers to stay on ‘top’ of the water, pressing down and back create more propulsion.
Cont.
While limiting undulation can create less drag, doing so too much can compromise the pull.
By lifting throughout the pull, it an allow swimmers to stay on ‘top’ of the water, pressing down and back create more propulsion.
Cont.
2
2. It also allows swimmers to aggressively shorten the distances between the torso and the arm.
And the faster that distance gets shortened, the more force swimmers will be applying to the water.
It can happen from pulling back, lifting the torso up, or both.
Cont.
And the faster that distance gets shortened, the more force swimmers will be applying to the water.
It can happen from pulling back, lifting the torso up, or both.
Cont.
3
3. The same skills are happening in butterfly.
It’s not quite as extreme because the pull is longer so swimmers have more time to apply force.
They’ll still rise, but not as aggressively.
Cont.
It’s not quite as extreme because the pull is longer so swimmers have more time to apply force.
They’ll still rise, but not as aggressively.
Cont.
4
Everyone talks about getting the hips up in breaststroke.
But the key isn’t to focus on the hips.
The hips have to come up after every stroke cycle so breaststrokers can get back in line.
That’s critical for eliminating drag.
But the key isn’t to focus on the hips.
The hips have to come up after every stroke cycle so breaststrokers can get back in line.
That’s critical for eliminating drag.