Tag Archives: Alignment

My ideas to solve the neck weight problem

This is the second article in a series about finding a better design for the weight needed in a dynamic pool freediving performance. The first article focussed on my discomforts and dislikings about the current design, which I blindly followed when I first started freediving. This article will focus on the way I intend to solve these problems into new solution and the design around it. In the 3rd article I will focus on the testing we’ve done so far with different setups, to see if they actually solve my problems. The 4th article will show how the design evolved through time by incorporating our findings from the test phases. Finally in the 5th article I hope to present a solution with an easy design, so other freedivers can try and build/buy one of their own and see if they benefit from it as much as I do.

Weight placement
To solve the weight placement, I chose to locate the weight around the lung area. It’s a bit of a tricky location and might be¬†disadvantageous¬†due to the flexing of the chest when inhaling and exhaling. Only tests will find out if I find this comfortable or not and if it doesn’t effect my normal breath-up.

Balancing
One of the solutions for unbalanced tilting that caught my eye is already widely used in the shipbuilding industry and is called a keel. The principle behind this solution is to spread the center of gravity, by placing a weight below the structural keel. For ships the use of a keel brings stability and improves the directional movement of the ship. My interest lies with the stability problem it solves; when a sail ship is sailing, the wind will make it tilt, the keel will counter act this by it’s weight. That’s exactly the behavior I want my prototype to have when I’m doing a dynamic performance. So when I tilt over, due to a slightly rotated push-off while turning, the weight underneath the chest will be counteracting this and ensure my alignment in the horizontal plane. So from the balance point of view it is best to place the weight underneath the body, or at least on the lowest point of the chest.

Optimal arm placement
In the 2 preceding points I opted for the placement of the weight around the lung area and at the lowest point of the chest in the water. This will solve my discomfort and inability to fully stretch the arms over my head as well. Because the area around my neck will be clear of any objects what so ever. Ofcourse the question remains; “Will the new weight placement introduce a new discomfort or is it easier to live with?”.

Commence the Testing
As we’re already testing and have been testing with a few different setups, I’m going to continue to test for a while longer to see if he new approach really brings what it should. I will report about my findings in a 3rd article as soon as I think it’s a good point in time to share it with you all. I’ve already shared some insight from my setup through pictures, but my experience still needs to increase a little more to share. How would you like to see the solution tested in comparison to the neck weight? Please leave your ideas in the comments and I’ll see if I can include this in the tests.

5kg in a vest to go under a blue seventy suit5kg vest under the blue seventy freediving suit

PS. Current design lacks the safety feature, so I cannot compare this in the tests.

Why I think the neck weight solution is wrong

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This is the first article in a series about finding a better design for the weight needed in a dynamic pool freediving performance. This article focusses on my discomforts and dislikings about the current design, which I blindly followed when I first started freediving. The next article in the series will focus on the way I intend to solve these problems into a new solution and the design around it. In the 3rd article I will focus on the testing we’ve done so far with different setups, to see if they actually solve my problems. The 4th article will show how the design evolved through time by incorporating our findings in the test phases. Finally in the 5th article I hope to present a solution with an easy design, so other freedivers can try and build one of their own and see if they benefit from it as much as I do.

The prototype I had recently tested, started out with an idea to get rid of my discomfort in wearing a weight belt around my neck. There are a few reasons why I dislike the neck-weight solution; Continue reading Why I think the neck weight solution is wrong

Repetitive training & technique

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That was some proper training at the Tongelreep, Eindhoven last night. Both Jorg and I had been planning to continue the good training from the week before, so we were determined to get the alignment on the next level by getting some distance in.

Repetitive
Distance not in the maximum performance, but in just set distances and more repetitions. Jorg set his schedule to 37,5 meters and repeated this 4 times. I set my distance at 75 meters and repeated this 2 times. I think I should up the repetitions before upping the distance, but I am still to find the right distance to improve from. I’m thinking to up the set distance to 87,5 meters for several reasons:

  • I always have to make the turn
  • I surface at the side edge of the pool
  • Winning the mental game towards a wall

Technique
I have noticed that technique also improves my freediving time as follows: When I do the constant cycle of kicking, it will take about 17 seconds for 25 meters and when I do the kick-kick-kick-glide, it will take about 20-21 seconds for 25 meters. Later in the training I did the kick-kick-kick-glide again and now the technique was better because of a constant motion in the complete cycle, now the time was around 18-19 seconds for 25 meters. Same effort more speed… I have to focus on getting into the proper technique straight away for the motion cycle.

I’ve included the video from last training for Lubomir Stefanoff to see the progress on the alignment better.

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Goals
Alright the goals for next training are set then ;). I’ll be doing 2 or 3 times a 87,5 meters dynamic with monofin and see if this can be a thing I get consistent in. Rest of the training will focus on technique runs and times 25 and 50 meter runs.

Monofin: Horizontal alignment correct both ways now

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So it seems from the training last night that my horizontal alignment is getting somewhere. The past few weeks we have been training a lot with the monofin, just to get the proper movement. The hardest part was figuring out what amplitude to go by and how that feels opposed to what you have been doing for a while now.

But last night during training I was just doing my thing based on the outcome of previous weeks of monofin training and was glad to hear Jorg tell me he was amazed what he was observing. One of the best things to bring at a training is the video equipment, which made the video from the horizontal alignment instantly available to me. Now I’m able to connect the feeling I had during the 75m performance to the way it looks, which in my case is very valuable.

After the successful monofin laps, it was time to focus on the turn points as I still don’t feel all to comfortable about the energy I put into the turn right now. What seems to be happening is that while touching the wall at a certain point the push off from my feet is considerably higher on the wall than the initial touch down. This is due to the somewhat larger monofin that I have to swing around, but it was a thing we could get rid of when using bi-fins as well. So we put some effort in the turns and after about 8 times there were 2 turns that showed potential.

So currently I’m going to stick with the following turn technique when using a monofin:

  • When I see the T stripe I’ll glide towards the wall
  • I roll over on my right side
  • touch the wall with my right hand and compress legs inwards
  • While compressing I use my grip of the right hand still on the wall to prepare for swinging the monofin around
  • Swing the monofin around at about the same location as my hand placement
  • Decompress by starting to stretch out the arms
  • Fully decompress by the push off with both feet equally

This felt like the best motion for me to stick with. Any tips or suggestions are welcome.