So after my rather epic 10k (outdoor) run last Thursday and a 4 day Easter break with no running, I was looking forward to getting back on the treadmill this morning. But what session to do? It struck me that it was clear my fitness (speed and endurance) had improved significantly in the last few months, so why not re-visit the interval session I was doing last Autumn and see how much I'd improved . So I did
The graph shows heart rate data for the same session (details on legend), same gym, same treadmill, same time of day and same watch (TomTom Cardio Runner) - so all variables controlled as much as possible.
You can see a significant lowering in heart rate during the warm-up jog (1st 3 minutes - HR now at about 127 - was approx 136) and at all other time points in the session - the recoveries are steeper too. Good signs