Posted by Larry Hoover on November 7, 2004, at 12:03:30
In reply to Re: Tyrosine questions, posted by sabre on November 7, 2004, at 2:25:47
> Thanks for replying Larry. Your expertise and comments are welcome and appreciated!
I'm a bit out of my comfort zone dealing with high-performance athletics.
> I noticed an improvement in the way I felt when I ran the first time I used it. The run was approx 10k but run easily. I felt less effort than usual.
I didn't see info on the mechanism by which tyrosine restricts heart function and blood pressure, but I'd bet it's suppression of noradrenaline. That's probably what you noticed, less NA.
> The run today was 6k and flat out. Maybe that had some bearing on the difference.You likely need to experiment a bit more to grasp the pattern more clearly.
> Perhaps the tyrosine is good for lower intensity aerobic based activity but not so useful for close to anaerobic threshold activity ie 85%+ heart rate?
Or maybe better used intermittently, rather than daily? Hard to say. Maybe you pushed past your normal exertion level because you didn't feel the NA thing happening?
> I read that Tyrosine causes bronchodilation and as I suffer from exercise induced asthma in pollen season this might have also explained the easier breathing I experienced with the slower run.Hmmm. Sounds reasonable. You may find that magnesium and/or niacinamide help, too.
> Two positive aspects today were:
> - that at 2/3 the way into the run I didn't experience dizziness, which I do usually. I think it could be due to hyperventilation. I have tried holding my breath for short spells during races and this sometimes helps. The tyrosine may have prevented it...who knows.
>
> - I recovered very quickly upon stopping.There is some strong evidence that a category of people respond as you describe. That type of response is not universal, and has thus limited the application to sports science. The thing is, it looks like it works for you, so it doesn't matter if you're a member of a sub-group or not.
> It is all a bit of a jigsaw and if it wasn't for psychological suffering, I think it would be fun.
>
> When you suggested using simple carbs to avoid excessive reduction in heart function what did you mean exactly?During the post-exertional recovery phase, your heart-rate is determined by a complex group of factors which also regulate artery tension. If you accidentally cut your heart rate, you could faint. Sugar/high glycemic index food with the tyrosine would prevent that.
> I suppose it is greedy wanting to be sane and to run competitively too but running has kept me sane and provided a distraction for a long time.Maybe you can have your cake and eat it too.
> Middle and long distance running attracts introverts, the uptight and social misfits. I fit in well and love it.
>
> sabreI'm intrigued by what your experiments will show, if you keep using tyrosine.
Lar
poster:Larry Hoover
thread:412746
URL: http://www.dr-bob.org/babble/alter/20041022/msgs/412901.html