Glad to hear you're working toward such an outstanding goal. Keep up the good work.

What you have to realize is that the bike will create an increased demand by the heart because of the muscle groups being used on the bike versus the treadmill or rowing machine. The larger the muscle group and the more it is imposed upon to perform, necessitates greater demand on the heart. Certainly, your present level of conditioning will have a dramatic effect on heart rate, etc. The legs are certainly in the large muscle group and depending upon specific demand, ie walking versus pedaling, the demand can change dramatically.  

Remember, it is not uncommon for the average person in poor condition to achieve heart rates of 160 or more when beginning an exercise program. What you're looking to achieve is moderate heart rate over an extended period, 30 minutes or so per day. Do not try to overdo it and give your body time to become acclimated to the change in demands of exercise activity.

It's highly doubtful that you're sensing any sort of pulsation of adrenaline. Such chemical changes occur on an incredibly small scale and not as though being pumped through a hose. It is more likely that you are sensing changes in blood pressure against the vessel walls, which indeed can create a pulsing effect throughout the limbs. Also, do not try to guess at your pulse, but rather obtain one of several varieties of inexpensive monitors to measure your pulse more accurately. Knowing more exactly what your rate is will help you to establish your regimen more precisely regarding exercise at certain thresholds below maximum potential.

Just remember to take it slowly and give your body plenty of time to make adjustments. Conditioning will improve with time and you'll find the bike to be less demanding on the heart.

Best regards and Good Health

Hi Bead

You are doing well!

I think it's possible to panic in any situation,  I think personally the heart monitor is a bad idea as you are thinking about your heart all the time then (Probably checking it every couple of seconds )
Try not to think to much about it as you are working yourself up literally before you've even started.



Kath x

I think you are doing so very well and are being very brave.  I wish i could be like that again, but hopefully in time i will be.
Just a thought on this whooshing feeling you get, is it the same as when you stand up quick from a sitting, kneeling or squatting position, re: change of blood pressure.  I feel it in my head, neck and ears, is that the one, the one that i try and accept everytime it happens as being normal? Lol.
Do try and keep going bead, you have done the hardest thing, the start of it, now if you can keep it going it will get better and better and your confidence will grow.  Could you send me some please too, lol?x