Tuesday, 30 March 2010

You WILL swim down...

As you aware, things have been going fairly well on the swim front with a steady increase in distance and effort over the last few months, finally, times are beginning to come down and I am starting to find some comfort when swimming for longer sessions. Like most situations with me there is a big 'HOWEVER'.
Just when I thought I was getting to grips with my lower back problem it has flared up to the point that today it called a stop to my training. The reasons may well me two fold...On Sunday 28 March I attended a Masters swim meet at Darlington where I took part in a few team events all of which only measured 50m per swim. I spent most of the day sat/stood around watching the gala, feeling increasingly uncomfortable despite attempting to sit or stand with good posture... (That was error number one). Post race I didn't bother with any swim down, thinking what was the point after three short sprints?...(error two) and finally I haven't used the Swiss ball for my core since Saturday (error three).

So..on Sunday evening after a good feed, I began to feel more and more uncomfortable to the extent that I was walking around like an old(er) man...I felt like I had ran a marathon as oppose anything else. The next morning I was so stiff in the legs I couldn't believe it. Surely this could not be from three little sprints??

I took Monday off from training and headed back to the pool this morning, only as already stated, to be thwarted by severe back pain and heavy legs...this prompted me to interrogate the Internet with a view to researching 'The Swim Down' and here is what I found:

The Swim Down - that last few minutes of the session when the hard work is over, when you can finally relax and start to think about what you are doing after the session. But do you make the most of your swim down? It should be one of the most important parts of your training.

There are numerous physiological reasons to swim down at the end of every session but there are other advantages that can be gained. As you train your body temperature and heart rate rise and the blood vessels in the muscles expand to allow more blood and hence oxygen to them. During training the body releases chemicals into the blood stream, such as adrenaline and endorphins, and there is a build up of waste products in the muscles.

A sudden stop in exercise can cause a rapid drop of heart rate, leading to a fall in blood pressure because of the blood vessels being dilated and the fact that the blood is well distributed around the body. Indeed in these circumstances it can tend to pool in your legs instead of returning to your heart. This can cause dizziness, nausea and a "worn out" feeling. The levels of adrenaline and endorphins remain high and can cause a feeling of restlessness and even a sleepless night. Equally waste products tend to remain in the muscles and can be a factor in muscle soreness and stiffness after training. In any case, it is not good for anyone to have a rapid decrease in body temperature, heart rate and blood pressure.

The swim down therefore serves two purposes:
it reduces your pulse at a rate that helps maintain blood pressure
it returns the blood to your heart but keeps the circulation at a rate that allows waste products to be effectively removed from the muscles.

HOW TO DO IT

It takes your body approximately 3 minutes to realise it does not need to pump additional blood to your muscles. A safe swim down period is therefore at least 3 minutes but preferably longer. As a very rough rule of thumb a swim down should be about 5 to 10% of the total yardage of a session, although in high intensity or lactate tolerance work it can be beneficial to lengthen the recovery phase of the session as the concentration of lactic acid and other by-products of respiration in the muscles will be relatively higher.

While swimming down there are a couple of other points that can be included to improve the quality of your session. If you've been swimming a lot of front crawl or fly, swim some backstroke. This works the joint in the other direction and exercises the opposing muscles. Doing this regularly can prevent, and in the early stages reduce the impact of, an injury.

Swim down is also an ideal time to include stroke work. Drills are well suited to less vigorous swimming and including these in your swim down will also ensure that your body and mind are aware of correct technique even when tired - a vital factor in racing.

1 comment:

Bruce Stewart (ブルース・スチュワート) said...

Very interesting. I have tended to always finish my swims by going flat out. Maybe the walk to the shower and the easy bike ride home is my "swim down", or maybe I have just been going too easy on the swim. Hope your training continues to go well as the summer approaches.