I am following a My Asics training plan for my first Half Marathon in the middle of October. I have really liked the plan, especially that it suggests a pace range for each run which has helped me as a beginner to get a good balance of different (appropriate) types of training run.
Up until now the race pace that it has suggested (predicted?) that I should run at has felt challenging, but achievable at 8:25 per mile. To give some context, today I ran 8 miles at that pace as a 'fast' run scheduled on the plan. That was slightly faster than suggested, but I wasn't looking at my watch for lots of my run, just trying to run at a consistent pace.
Now the plan has suggested adjustments to my race pace (7:52 per mile) and corresponding training paces.
After the 8 miles today I felt like in 4 weeks I might be able to add another 5.1 miles at the same pace, but this new suggested pace seems too challenging.
Does this seem like too much of a jump? Is race day likely to make that much difference to the pace I can sustain?
I am a beginner having I started running properly in April (have run on and off for a few years) and have run consistently 3/4 times a week since, doing around 23 miles a week at the moment. I have only missed 1 run on the training plan.