Here is a simple plan to follow for doing a sub 20 5k based solely on using HR training Zones.
Maybe you haven’t got a pace/GPS feature on your training watch – that’s true for a lot of people.
Oh well, each to their own; let’s continue then based just on HRs.
You will know that HR varies day by day for lots of reasons that I won’t go into here. Those variations can be relatively trivial but sometimes not. You will understand that if I ask you to do an interval in HR Zone 4 (HR Z4) then you may well start off too quickly before your heart catches up to your workrate.
You will also have worked out your HR training Zones. Lots of people have lots of different ways of doing this and I will use Joe Friel’s Zones. Here is how you can work out your zones:
Zone 1 Less than 85% of LTHR
Zone 2 85% to 89% of LTHR
Zone 3 90% to 94% of LTHR
Zone 4 95% to 99% of LTHR
Zone 5a 100% to 102% of LTHR
Zone 5b 103% to 106% of LTHR
Zone 5c More than 106% of LTHR
His zones are based on LTHR – lactate threshold heart rate, which is the maximum average heart rate you can maintain for 60 minutes. You will need to do a test to determine this but you can get a good average estimate from the last 20 minutes of a 30 minute SOLO race effort. An average of the last 3k of a recent 5k PB is good enough. Your LTHR should get HIGHER as your training progresses and you get ‘fitter’. Please feel free to increase LTHR whenever your stats tell you to (this will then change your training zones). Unless you’ve had extended periods (>1 month) off running then do NOT lower either your LTHR or your training zones.
My assumption would be that you are a beginner to intermediate level runner, perhaps some way off achieving a sub 20 minute 5k (the headline that got you here in the first place).
- Monday: 45 minutes at the low end of Z2. +Weights for leg strength. EASY.
- Tuesday: 5 x 6 minutes of effort with 5 minutes rest. The effort is the maximum you can consistently maintain throughout the session. A similar level of effort to your last 5k PB. Your HR may hit Z5a, don’t go higher than that. HARD.
- Wednesday: 45 minutes Z1. +Drills. EASY.
- Thursday: 15 minutes warm up then 60 minutes in Z3 to Z4. HARD.
- Friday: Complete Rest. EASY.
- Saturday: 45 minutes at varying speeds and varying gradients. MODERATE.
- Sunday: Long run of 90 minutes. +Core exercises. MODERATE.
You can find diagrams/resources on weight sessions and drills at http://pinterest.com/the5krunner.
Please feel free to skip any of these sessions. Doing all of them would be quite hard for most people. Aim to do 3-4 sessions per week at first.
You can probably keep on doing this plan month after month. Although it may well get a bit boring! Variety will alleviate any boredom you have BUT it will also importantly improve the response mechanism of your body to exercise…which is a good thing. You might want to vary things by, for example, doing a little less rest than the 5 minutes prescribed on Tuesday.
Let me know how you get on. It will get you to a sub 20 5k. as I said earlier, personally I would include more focus on pace based training.
This content is not sponsored. It’s mostly me behind the labour of love which is this site and I appreciate everyone who follows, subscribes or Buys Me A Coffee ❤️ Alternatively please buy the reviewed product from my partners at their regular price. Thank you! FTC: Affiliate Disclosure: Links may pay commission. As an Amazon Associate, I earn from qualifying purchases.