Maintaining your threshold power during winter

Hi,
Ive got my first build period starting in a month when I start focusing on doing threshold intervals twice a week, such as 2 x 20min, but when I come round to the base period again in September / October time my focus moves back to building an aerobic base.
During the base period I dont want to loose what I have worked so hard for, so how do I go about maintaining my threshold power so come this time next year I can build on where I left of this year rather than having to build it all again?
Would I still need to keep doing threshold intervals during base, maybe once a week or every other week instead of twice a week as per build period, or do them for less time??
Any advise please?
Ive got my first build period starting in a month when I start focusing on doing threshold intervals twice a week, such as 2 x 20min, but when I come round to the base period again in September / October time my focus moves back to building an aerobic base.
During the base period I dont want to loose what I have worked so hard for, so how do I go about maintaining my threshold power so come this time next year I can build on where I left of this year rather than having to build it all again?
Would I still need to keep doing threshold intervals during base, maybe once a week or every other week instead of twice a week as per build period, or do them for less time??
Any advise please?
Cycling never gets any easier, you just go faster - Greg LeMond
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Product manager, Sports
Would that be 2 x 20 intervals you are referring to, or would shorter durations still be acceptable to prevent the slide?
Also, doing threshold intervals once a week during base, and twice a week during build you are effectively working on threshold all year round, wouldn't that lead to overtraining?
Overtraining occurs when there isn't adequate recovery so whether your threshold intervals are all year or not isn't the relevant point it is what you do around them that is.
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If you do this, it doesn't take that long to reach your end of last season fitness. Then you can build on it.
So if you've done no intervals for a month, then you wouldn't necessarily start off with your mid-season interval program. Maybe a single 20 minute effort or 2 x 10 in the first week, then 2 x 12.5, 2 x 15, 2 x 17.5, and 2 x 20 in week five. And maybe work in a few shorter efforts on another day.
As doyler88 said, overtraining is when you can't handle the load you've set yourself. This is a relative thing.
Product manager, Sports
keep mixing it up, bit of threshold, couple of vo2max intervals and the odd sprint now and again, all based around some decent tempo rides and you can't go wrong.
Then obviously just up the intensity closer to your events
You don't even need to ride tempo if you're doing intervals/VO2 max efforts. You can still go at a relatively low intensity on road rides and still have positive adaptations take place.
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