Exercise heart rate

Question
I am 180 lb 66 yr old male in generally good health, but smoked for 40+ years.  After "spotty" exercise for some years, for the past 4 months have been increasing treadmill/bike/eliptical.  Am up to 4.2 miles in an hour - but when I run for a few minutes, heart rate jumps to 150+. How can I tell when/if this gets dangerous?  My goal is to run 5 miles in less than hour by summer.  Any suggestions appreciated.
-Roger

Answer
Hi Roger
Would it be possible for you to call me here in albuquerque NM,since your question is a very serious one and i just want to make sure i get you the proper answers communicated with real clarity since email is hard to convey and communicate properly.You can get my contact on my web site.You can call from 6am to 8pm MT any time.If not i will do my best.I would also need to ask you a number of questions for additional clarity.



All the best

John