PB said:How much training and how long did it take any intermediate runners out
there to jump from one to the next ?
I can do 5K in an 35 minutes or so, 10K in 1:15 to 1:30. I don't care
about speed and competition, only fitness and weight loss. I jog and
walk if needed at a comfortable pace for my body.
A general guideline is to increase long run OR total volume by NO MORE
than 5% (10% every 2 wks; based on either duration or distance). That
would make it a minimum of 4-5 months to go from long run of 10k to 21k
safely. Many people find they need to adapt to a particular distance /
duration before moving onward or risk injury. Also if you run someplace
where you need to transition to snow and subzero F temps, you might find
it a little more challenging to increase at that rate. IOW, 6 months or
more might be a more realistic estimate, depending upon where you are.
It's also not clear whether the distances and times you gave are long
runs, and you want to know how long to increase your long run to
half-marathon distance (my interpretation) or whether they are your race
times and your long runs are longer. I'm also guessing you may be either
a fairly new runner with low volume (<15 mpw) based on your times
(assuming these are road races) - and you'll likely hit some stumbling
blocks between 10k and 21k.
If you want to "do" a half-marathon race, you could pick a race, say 6
or more months in the future, and follow a plan to get there. If you
have problems with the training, then back off and maybe pick a later
half. If you're mostly interested in fitness and weight loss, there's no
need to jump the race distance, but you can focus on increasing volume
and general conditioning.
Note: I'm basing my comments on the similarity of your times to some of
mine (either original road training times or more recent trail "race"
times, loosely adjusted from trail to road) and what's worked for me and
where I hit stumbling blocks. I "did" my 1st 10k race in March this year
and hope to do a 13-miler in early June next year (assuming it's
offered), but part of that time is an artifact of lack of available
races, slower building time in Alaska winter, and liking hills. Most
people will build faster than myself, but I'm just giving you my experience.
Good luck.
Dot
--
"If we reach all our goals, we are not setting them high enough."
- Matt Carpenter