5 Tips to Build Running Speed and Endurance

5 Tips to Build Running Speed and Endurance

Should I Run Faster... or Run Longer?
 
It's a question a lot of runners ask in their training and it can be a bit confusing knowing what to do.
 
The truth is, both play an important role in improving your running. Running longer helps to build endurance, improves fat burning and trains your body to utilise oxygen to convert fuel into energy. Meanwhile, running faster helps improve cardiovascular efficiency allowing you to run faster for longer and helps muscle conditioning.
 
Here are five tips to help you get the most from both. 

1. Know Your Running Goal Before Anything Else

 

Whilst a well-rounded runner will carry out both longer, slower runs and faster, high intensity runs, your training should match what goal you’re aiming for.
 
For example, if you’re preparing for a marathon, longer training runs at the zone 2 pace will be crucial. However, if you’re targeting a faster 5K, speed sessions should play a bigger role.
 
It may be that when you start out, you have a mix of both types of training, however as you get closer to an event you switch to which type of run suits your race most. 

2. Why Building Your Aerobic Base Comes First

 

Before focusing heavily on speed, make sure you have a good aerobic base. Easy, longer runs help your body to become more efficient, resilient and will help to reduce injuries over time. On top of this, building a base level of aerobic capacity improves your ability to recover between training sessions, meaning you can handle more training over time without breaking down.

 

3. How to Add Speed Sessions Without Getting Injured

 

Speed sessions like intervals, tempo runs, or hill repeats can improve your pace and running efficiency. However, jumping in with speed too quickly can lead to injuries. 
 
A Lactate Threshold Test or a simple running time trial can help you to set personalised training zones, meaning you know what your recovery and easy pace speed and heart rate are, as well as what your VO2 max is. If you don't have access to a heart rate monitor, Rate of Perceived Exertion (RPE), simply rating your effort from 1 to 10, is a reliable and free alternative.
Once these zones are set, you have a much better awareness of how hard you should be running for each type of session, and you are less likely to over do it and get injured or under do it and not progress.

 

4. Recovery Is Training: Why Rest Makes You a Better Runner

 

Running faster and longer both increase the demands on your body. Rest days, easy runs, and good recovery habits like a good night's sleep are just as important as the training itself in helping to prevent burn out.

As well as this, try to plan some recovery nutrition after longer training sessions so you can eat as soon as finish your session. For longer runs aim to have between 20-30g of protein within 30mins-2hours of your workout to help those muscles to recover efficiently. Remember to also replenish your carbohydrate reserves!

 

5. How to Balance Speed and Endurance in One Training Week

 

A well-rounded training week often includes one longer run, one faster session, and a few easier zone 1-2 runs. This balance helps you to build endurance, improve speed, and stay consistent.

This can work even if you are running just three times a week, with one interval/hill rep run and one easy/ recovery run during the week, and a longer endurance run saved for the weekend. If you are increasing volume, always keep the increase as zone 1-2 to prevent ramping too quickly and causing injury. 

 

A sample week with 4 sessions a week with a nice spread of effort and recovery might might look like:

Monday: Rest or easy walk/ easy cross training

Tuesday: Interval or hill rep session

Wednesday: Easy Zone 1–2 run (20–30 mins)

Thursday: Rest or cross-training

Friday: Easy Zone 1–2 run

Saturday: Rest

Sunday: Longer endurance run

 

At the end of the day, the best training plan isn’t about choosing faster or longer, it’s about combining both in a way that keeps you progressing and enjoying your running, towards your individual goal.

 

FAQ

Q: Should beginners focus on running longer or faster?

A: Endurance first. Building an aerobic base before introducing speed reduces injury risk and gives your body the foundation to handle faster efforts safely.

 

Q: How often should I do speed sessions per week?

A: For most recreational runners, 1–2 speed sessions per week is sufficient. The remainder of your runs should be at an easy, Zone 1–2 effort.

 

Q: What counts as a speed session in running?

A: Intervals, tempo runs, and hill repeats all qualify. Intervals build raw speed, tempo runs develop your lactate threshold, and hills build strength and power.

 

Q: How do I know when I'm ready to add speed sessions to my training?

A: A good indicator is when you can comfortably run for 20–30 minutes continuously at an easy, conversational pace. If you're still building up to that, focus on time on feet first. Once you have that aerobic foundation in place, introducing one speed session per week is a sensible next step.

 

Q: Will running longer make me slower?

A: Not if it's done correctly. Easy, longer runs build your aerobic base and improve your body's ability to use oxygen efficiently, both of which actually support faster running over time. The key is keeping those longer runs genuinely easy (Zone 1–2) so they complement, rather than compete with, your speed sessions.

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