Since I have increased my speed while running I have been diligent in checking my heart rate after each speed interval. After most intervals,I am usually at or close to the 80% maximum heart rate. During my 5 minute intervals this week, I have been above 80% after each run. I can quickly recover once I start my walking interval.
Is it safe to be above the 80% maximum HR? If so, for how long?
Is this a sign that I am trying to push up my speed too soon? Should I back off the speed for an interval if I am over 80%?
I never checked my heart rate when I ran my other 5ks. Maybe it was above 80% then too. I am just not sure. I really want to make my goal of running a 5k in under 40mins but that isn't something I want to do too soon if it can cause problems. I hope to be running the rest of my life and if it takes to reach my under 40mins goal, so be it. If being over the 80% is okay, I want to keep pushing myself.
I hope my questions make sense to you all and someone can help me out. Thanks- Jess