Flat-line!

Thankfully not a true flat-line in the sense of the word, otherwise writing this would prove difficult! Heart rate data from today's treadmill run; 90 minutes at 5% incline and 9.0 km/hour (6:49 / km):

Managed to burn 1,347 kCalories - but there is a curry on the way so I'll be replacing those food stores soon!

Still doing most of my training in zone 1 (<80% maximum heart rate). For me, this is less than about 151 bpm. This is an approximation at present but hopefully over the coming weeks I'll get some more scientific data on lactate thresholds and VO2max values and explain what it all means in terms of fitness levels and training...