09/08/2026
This is what physical stress actually looks like on paper ⬆️.
This graph shows my HRV (heart rate variability) over the last 4 weeks. I ran Lakeland 50 two weeks ago where my score was still in the green.
HRV reflects variation in the time between consecutive heartbeats and is influenced by the balance of autonomic nervous system activity. A sustained reduction can be seen when the body is under increased physiological stress and reduced parasympathetic (“rest & digest” response) activity, which may occur during periods of incomplete recovery.
Running long distances doesn’t just lead to muscle fatigue and inflammation. It temporarily stresses the nervous, cardiovascular, immune, metabolic, endocrine and musculoskeletal systems.
After my initial muscle soreness eased and I recovered lost glycogen stores I did feel better but my physiological markers are clearly showing the need for a much longer recovery. I expect my recovery will still take quite a few more weeks and I will be taking it easy during this time and cross training to reduce tissue loading before I get back fully to it. Everyone’s recovery is different depending on a number of factors but I thought this graph showed my recovery very acurately.