Ever wondered what happens when you combine the two most powerful strokes in swimming? The result is "Butterfrog," an old-school hybrid stroke that merges the arms of butterfly with the kick of breaststroke.

While you won't see it in the Olympics, this unique stroke is a fantastic drill for mastering the timing of butterfly and adding some fun variety to your training. This lesson will show you how it works, and even introduce you to its opposite: the "Breastfly" drill.

Dive Into: The Butterfrog and Breastfly Drills

What is the Butterfrog Stroke?

The Butterfrog is a combination of butterfly (also called dolphin) and breaststroke, which are both called short-axis strokes. They both work from a pivot point in the hips and create an undulating motion forward.

The major distinction between the two strokes is the arm recovery. Butterfly recovers above the water, and breaststroke recovers right at the surface. The true butterfly uses an undulating dolphin kick, and breaststroke uses a frog-like kick.

Since the two swimming strokes are quite similar, it is not as hard to combine them. The resulting stroke uses butterfly arms with a breaststroke kick. While it is still considered legal to use in competitions, the speed of the stroke is very slow and not recommended for racing.

How to swim butterfrog
Spread your wings on butterfly

How to Swim the Butterfrog

Rhythm and timing are the most difficult aspects of short-axis strokes, and a good undulating motion is critical.

🎥 Watch: Butterfrog in Action

Watch carefully how the legs complement the arms in this video.

🎥 Watch: Slow-Motion Technique

And here is another video that shows you how to slow the Butterfrog down, so you can work on the technique.

The Opposite: The "Breastfly" Drill

How about trying it the opposite way? Breaststroke arms and butterfly legs.

This is actually a very common breaststroke drill which teaches you a nice body undulation and lets you strengthen your arms, especially if performed with paddles.

🎥 Watch: The Breastfly Drill

See the video below on how to do the Breastfly drill:

Why Bother Learning These Drills?

In summary, if you do struggle with butterfly, the Butterfrog stroke can be a great substitute to teach the correct arm motions. Most of all, these hybrid strokes can be a great break from the everyday monotonous practice. So give it a go!

Frequently Asked Questions

What is the 'Butterfrog' stroke?

Butterfrog is a hybrid swimming stroke that combines the powerful, over-the-water arm recovery of butterfly with the whip-like kick of breaststroke. It is an old-school stroke that is still legal in competition.

Why would I swim the Butterfrog? Is it fast?

No, Butterfrog is very slow and not recommended for racing. However, it is an excellent drill for learning the timing and rhythm of the butterfly arm motion in a more controlled way. It's also a great way to add variety to your workout.

Is it legal to swim butterfly arms with a breaststroke kick?

Yes. According to swimming rules, using butterfly arms with a breaststroke kick is a legal stroke, though it is not competitive.

What is the 'Breastfly' drill?

Breastfly is the opposite of Butterfrog. It's a common drill that combines the breaststroke arm pull with the undulating dolphin kick of butterfly. It's great for teaching body undulation and building arm strength.

Why can butterfly and breaststroke be combined?

Both are 'short-axis' strokes, meaning they create an undulating, wave-like motion that pivots at the hips. This shared foundational movement is what allows their arm and leg motions to be mixed.

Swim Advice Topics

Butterfrog Extreme (The Old School Butterfly Stroke) is part of the following categories: Breaststroke, Butterfly and is meant for swimmers in: Level 2 - Beginner

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Comments (5)

Anonymous said...
Wow, thanks for the tips!
Reply
Shuu Mai said...
I just started spontaneously doing butterfrog recently. To me it feels more powerful and easier than regular fly. I have only done fly for 25-50 yards, so I am no expert. I think playing with butterfrog will help me to work out body angle issues during the fly.

Sometimes it is hard to switch between the different kicks. hehe
Reply
Christophe from Enjoy Swimming said...
What I like the most about this video is the second half where you can see Terry's great breaststroke kick: the feet stay within the shadow of the body as they come back to the buttocks, then they nicely rotate out to the sides as the legs extend.
Reply
Anonymous said...
I have some back problems and old injuries. I was a martial artist in the past but always loved swimming. Regular, modern butterfly stroke I was always able to swim but I noticed it has an impact on my back and so I decided to swim old butterfly shown it this video. Swimming this style causes no problem to me and the best thing is I can swim it on long distances without becoming very tired. I can swim it even a mile, slower pace of course. I just love old butterfly!
Reply
Libor J said...
@Anonymous: thanks for sharing your experience with butterfrog :). Well done.
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