Paddles in swimrun – How far can they be developed?

“To all whom it may concern:”

Robert Henry Wallace Dunlop wrote already in 1876 and little did he know that his letter to the US Patent Office would come to affect swimming from that moment on, up until today.

What Robert had invented was the heart-shaped swim paddle with accompanied swim fins. After years of field testing he felt confident that his hand-and-foot-plate invention would “help improve human locomotion in the water.”

Continue reading “Paddles in swimrun – How far can they be developed?”


We are humbled!

When we finally launched WoS in early 2016, we really didn’t have any idea of what to expect. A group of people, enthusiasts with regular jobs, who together shared an interest in swimrun, took our internal discussion public, and started sharing our thoughts regarding the beautiful and lovely sport of swimrun.

We could never have imagined that so many of you would be interested in what we had to say about swimrun stuff. But we are really happy that you are, and as of today we have passed 1 million visits.

From the start we’ve written over 160 posts, together done over 50 races and adventures world-wide. We’ve kept evaluating gear and conducted the 1st ever international and independent swimrun equipment test in 2017. We keep pushing and debating swimrun and its development, help national swimrun societies to start, support race organisers and racers and through our world map and swimrun race calendar, give you everything you need to start racing.

Here are a couple of popular post over the year:

It is because of you that we keep going. All the interesting feedback we get from beginners to pro’s. Swimrun keep developing and we are all part of it.

Our door is always open and you are welcome to join!

By swimrunners – For swimrunners


The WoS Team

Dont forget to check out our 2017 swimrun equipment test results:

(Just click on any of the links)

Why cutting the wetsuit will give you a better running economy

The topic on cutting the wetsuit or not, is under constant debate. Especially now with all the new swimrun wetsuits hitting the market in 2017. Should you cut it and if so, what are the reasons for doing it? Read more about it further down.

Dont forget to check out our 2017 swimrun equipment test results:

(Just click on any of the links)

/The WoS Team

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This text will mainly focus on the running economy in swimrun, but everyone who runs should read it! Here you’ll learn a lot of things about your running efficiency, regardless if you like to run in rubber or not.

Approaching my debut in swimrun, having trained a lot of people running in various running contests, including several ÖtillÖ challengers and winners, I thought it’d be a good idea to try this myself. Especially since I give courses on how to best use the biomechanics to become the most energy efficient runner as possible in forests and on rocks. I put out a question on Facebook on whether I should cut or not, and most racers seemed to agree to cut the wetsuit above your knees, but failed to give any further explanation on the underlying reasons to do this, apart from the fact that it will become easier to run? As a nerd I decided to investigate this myself. Continue reading “Why cutting the wetsuit will give you a better running economy”

2017 Swimrun Equipment Test Results – SOCKS

– A good swimrun sock can almost replace a shoe!

(Old Jungle Saying, the ‘Phantom’)

Many of us spend plenty of valuable time researching and trying out the perfect shoe, but hands up all of you who spend the equivalent time on socks? A good pair of socks should treat your feet like royalty, help decrease or to avoid the risk of general discomfort, blisters, fungus, toenail problems and even odour. In swimrun they should also help release heat, promote movability and help discharge excessive water.

Finding a good swimrun sock takes time.

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At the end of March, World of Swimrun (WoS), Swimrun France (SR-F) and Swimrun Germany (SR-G) teamed up in Marseille, France for the 1st ever international swimrun equipment test. During 4 days the team tested and debated swimrun equipment from over 40 manufacturers, among them, different types of socks. An important note here is that we only tested different types of socks from the same brand, i.e. NOT as a comparison between brands. There are many good socks on the market why you should test several before deciding.

Socks come in different colour, shape, form and level of complexity in stitching. There are multiple factors to take into consideration such as if they are seam-free, come with differently stitched panels, the type of fabric used, if certain wear-and-tear areas are reinforced, how they stretch when running and how they fit your favourite shoe and so forth. In swimrun you’ll see most racers use socks that can be put into 4 different type-categories e.g.;

  • Long 1-piece,
  • Medium (ankle high),
  • Short (ankle-low) and
  • 2-piece.

Our preferred model – The Medium (ankle high)

Our overall test winner was the medium version (ankle high). Its reasonable height on the lower leg will help prevent sand, mud or rocks from coming in on the inside, while running and during transitions. At the same time as allowing for proper ventilation in hot races. It’s also a good choice if you want to have the option to use a separate set of swimrun calfs. This sock we tested is specifically made for running off-road on, rocky, uneven and muddy surfaces, designed with extra attention to support and moisture management, which drained well and remained light even when being wet.


Long 1-piece – The Robust Protection

The long 1-piece was our second choice. Even though it doesn’t give you the same feeling of ‘freedom’ as the medium model, this one  provides full support over the foot and calf. It will protect you from sand, mud and stones but also sun and bushes when running on the trail. If you want you can insert floating material on the inside for buoyancy purposes, or why not gels, bars or waste during a race. They carry many usage options. Plus, if you race in teams of 2, they provide good visibility in the water for the person swimming behind. If you are prone to heating up they can become a bit too warm, especially in shorter warmer races. The compression version will help increase circulation in the calf.


2-piece – The Choice of Flexibility

If you want to maintain the feeling of ‘freedom’ around the ankle, you should opt for the 2-piece. The testing team fund this one to be a good choice when balancing between a lower type socks, where still wanting the benefits of compression. Also the option to change the type of sock depending on the type of swimrun race.

Short (ankle low) – The Minimalist Choice

This short-type sock is perfect for running however, it does allow for small stones or mud to enter inside, which can be a nuisance. If you’re the hot-type of swimrunner, you probably want go for this type anyway.


By swimrunners – For swimrunners


På återseeende – Tschüß und Auf Wiedersehen – Entendre en arrière – Until next time – Zbogom!

/The WoS Team, Swimrun France & Swimrun Germany


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We want to thank all manufacturers that helped us by providing equipment for our test:

Bagheera *

Barracuda *

We also want to extend a BIG thank you to for helping us with the logistics, Fix parents for housing the testing team, and last but not least, all you swimrunners who have followed us over the weekend, liked what we do and asked us so many intelligent questions. 


How to navigate in open water swimrun races

Do you know how to navigate in big open water?

If not, below is a quick insight into how!

/The WoS Team


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How to navigate in open water swimrun races

Swimrun races with high swim/run ratio taking place in big open water, put high demand on the swimrunners ability to navigate. If the race is known to demonstrate changeable wind and current conditions, this skill becomes even more important.

If you do a coastal type race, it’s easy enough to navigate even though this most likely mean having to breathe on the coastal side during the swim. However, when swimming point-to-point races and over large open sea, there is the chance to deviate from the planned course without knowing it. Especially if the winds and currents are strong. This is the reality for many races, including ÖtillÖ.

What most racers usually tend to miss in island swimrun races is the fact that the current, despite the wind direction, tends to change and re-shape when passing an island or narrow gap. Usually also picking up in strength in certain areas.

Continue reading “How to navigate in open water swimrun races”