This is quite common, with more people experiencing an elevated heart rate over that specified. If you are experiencing no ill effects and feel normal then there is almost certainly nothing to be concerned about – particularly if you are a seasoned runner.
It should also be noted that there is a variable lag (delay) in heart rate response, and consequently the short fast running steps may be completed before your heart rate has had time to increase into your specified range.
The primary underlying issue stems from how heart rate specifications are calculated. Presently, TrainAsONE’s figures are slightly modified versions of the standard working range heart rate zone calculations. The problem being that despite their popularity and evangelists, there is no clear evidence on their utility and when studied they do not seem applicable to a significant proportion of people. A major contributing factor to their error is that they are reliant on poor estimates of maximum heart rate.
If you have concerns then please use the in-app ask a question feature, and we will be happy to discuss your specific situation and advise.
References and Further Reading
- FAQ: What is best, training to pace or heart rate?
- Cooper, C.B. and Storer, T (2001) Exercise Testing and Interpretation, A Practical Approach. Cambridge: Cambridge University Press.
- Bouchard, C. (1982). Exercise and Sport Science Review. New York: Franklin Institute Press. p. 49-83.
- Atwal S, Porter J, MacDonald P. Cardiovascular effects of strenuous exercise in adult recreational hockey: the Hockey Heart Study. CMAJ. 2002 Feb 5;166(3):303-7.