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Spring race season is coming 👏 which means one big question starts popping up:
When should I start training — and what should that actually look like?
Whether you’re eyeing a 5K or a marathon, the answer depends on three things:
Let’s break it down by distance (5K to marathon) and by experience level (beginner, intermediate, advanced) so you can map out your season with confidence.
Before picking a timeline, ask yourself:
- Have I been running consistently?
- What’s my current weekly mileage or time on feet?
- Am I injury-free?
If you’re new to running — welcome! 🎉
The most important thing you can do is build your aerobic base before jumping into race-specific training.
- Ideal: 6–12 months
- Minimum if motivated by a race: ~6 months
Yes, that might sound long — but building improves endurance and sets you up for long-term success.
During this phase:
- 2–4 runs per week
- 1–3 strength sessions per week
- Gradual increases in mileage and time on feet
- No rush to add intensity
The goal is simple:
- Stay injury-free
- Progress week after week
- Feel stronger, not wrecked
You should start noticing:
- Rate of perceived effort (RPE) improving
- Paces feeling easier
- Heart rate becoming more stable at similar efforts
Example: Beginner Training for a 10K
If a brand-new runner came to Kathletics wanting to run a 10K, here’s how it might be structured:
Phase 1 (First 4 Weeks)
- 2 runs per week
- 2 strength sessions per week
Phase 2
- Increase to 3 runs per week
- Maintain 2 strength sessions per week
From there:
- Gradually increase time on feet
- Avoid jumping mileage too quickly
- Focus on consistency, fueling, and recovery
Once a solid 4–6 month base is built:
- 5K or 10K: 8–12 weeks
- Half Marathon: 16 weeks
- Marathon: At least 16 weeks
If you’ve been running consistently for months or years, your timeline shifts.
You still need a base phase — but it doesn’t need to be as long as a beginner runners.
- 3–6 months (depending on recent training history)
- Continued aerobic development
- Strength training to build strength and power
Then you shift into specific training.
5K–10K: 6–12 weeks
Half Marathon: ~12 weeks (if consistency has been strong)
Marathon: 16 weeks (especially if mileage or volume hasn’t been high recently)
“Advanced” can mean 3 years of training… or 15.
There’s a big range here.
Advanced runners often have more flexibility because their aerobic base is well developed.
But the timeline still depends on the goal.
5K or 10K:
- 4–12 weeks of focused work
- Or possibly none if running this distance casually
The key question:
Are you running for fun — or trying to PR?
A PR effort deserves a structured and focused block.
Half Marathon:
- 8-12 weeks depending on goals
Marathon:
- Minimum 12 weeks of focused training
- 16 weeks is often ideal
Unless marathon distance is part of something larger (like ultra training), you don’t want to stay in peak long-run mode year-round.
- Base: 6 months
- 5K/10K: 8–12 weeks
- Half/Marathon: 16+ weeks
- Base: 3–6 months
- 5K/10K: 8–12 weeks
- Half: ~12 weeks
- Marathon: ~16 weeks
- 5K/10K: 4–12 weeks (goal dependent)
- Half: 8–12 weeks
- Marathon: 12–16 weeks
Spring races are closer than you think — but rushing the process rarely works. No matter your fitness level, your program should meet you where you are, follow progressive overload, and involve strength training, recovery, and fueling.
The right timeline:
- Improves performance
- Builds confidence
- Makes race day enjoyable
If you’re unsure what timeline fits your current fitness level, that’s exactly what we help with inside 1:1 coaching at Kathletics. We build structured and intentional training programs that meet you where you are.
If you’re ready to get in the groove for your spring (or fall) race, schedule a free consultation and let’s map it out together.
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