transition from bike to run

aidanki wrote: »

After a good while I made a return to outdoor triathlon activities yesterday evening, have been training pretty consistently during the winter and spring in the spring.

So cycled my 20k in 36min 30s and hearrate in the 150ties. Arrived back home and jumped off the bike to go do the 5k run, was anything but tired and had plenty left in my lungs.

A dizziness and disorientation appeared, the dizziness got so bad I had to stop, the blustery wind which seemed to be around yesterday evening might have had something to do with it.

A lower back pain also appeared might having something to do with legacy back problems……….
Any ideas on how to minimize the dizziness and disorientation.

Providing you have no underlying health issues of course, the dizziness is due to fluctuations in blood pressure and changes in blood circulation when changing from one discipline to the next.

You're changing posture from a seated position to a standing position and making different requirements of different muscles which can cause dizziness in some. There is also the possibility that your blood sugar levels had dropped by the time you had started running. Dehydration may have been a factor also.

It has been particularly windy which would cause you to overexert yourself placing strain on your cardiovascular system as well as your back. If you have been stuck on the turbo trainer indoors in recent months your core stabilising muscles would be weaker too, and this places extra strain on the lower lumbar vertebrae.

I'd suggest trying further brick sessions but at a lower level of intensity till your body acclimatises to the new demands you are placing on it which it does by forming new neuromuscular pathways.

aidanki wrote: »

whats a brick session

A brick is when you run straight off the bike.

Don’t know if it helps OP but I always find that when I start running off the bike that I find myself going way too fast. I think it is to do with the perception of speed ( your mind is used to going 30 odd kph and then all of a sudden you are going considerably slower, so you subconsciously run faster). Anyway, I pretty much always find I have to force myself to slow down to my usual pace when I start running (using my watch as a guide). If I didn’t do that, I might end up way over exerting myself. Could it be that the dizziness is because you’re going too fast?