Please can someone give me some guidance!
I am training towards a half marathon in a couple of months time, and I am aiming for 1hr 30.
Now, I currently run 8 miles at about 1hr 28 minute half marathon pace, with a HR of 153 average. Its steady at this rate through the distance, so my plan is to just up it about 1 mile per week, if I can. I run hills once a week and a long slow run at the weekends.
I'm a bit worried that I am pushing too hard here - using the 220 minus your age (I'm 43) formula, I am looking at running for 90 minutes at 88% of max.
Anybody help me?
cheers