7 doctors weighed in:
49f-runner 5 mi 4-5 times a week. Pulse under 50, 50% of the time wornout?
7 doctors weighed in

Dr. Mark Stern
Internal Medicine - Cardiology
4 doctors agree
In brief: Normal
Common probably normal for a runner.

In brief: Normal
Common probably normal for a runner.
Dr. Mark Stern
Dr. Mark Stern
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Ken Starnes
General Practice
In brief: Fuel and don't push
It's hard to say without more information about your workouts and your running history, but you could not be eating enough/right, be overtrained, burned out, iron deficient, or sick.
Ease up a bit and make sure your nutrition is adequate. If it doesn't improve, or gets markedly worse your doctor can evaluate you.

In brief: Fuel and don't push
It's hard to say without more information about your workouts and your running history, but you could not be eating enough/right, be overtrained, burned out, iron deficient, or sick.
Ease up a bit and make sure your nutrition is adequate. If it doesn't improve, or gets markedly worse your doctor can evaluate you.
Ken Starnes
Ken Starnes
Answer assisted by Ken Starnes, Medical Student
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1 comment
Ken Starnes
Anytime. I would recommend book "Nutrition for the Endurance Athlete" (no financial interest) for the fueling part. Also, if your resting HR increases, that is a big sign that you're overtraining and should ease back a bit.
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Dr. Umesh Patel
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