kaizen
7 day free trial
kaizen
Running plans break when life happens
Train with confidence that you’re progressing towards your goal,
even when the weeks aren't perfect
Train with confidence that you’re progressing towards your goal, even when the weeks aren't perfect
7 day free trial | Available on iOS & Android
Prediction
2:37
Achieved
2:37:14
-0 min
Ryan Wilmott
London Marathon '24
Prediction
2:35
Achieved
2:33:54
-1 MIN
Josh Sambrook
Hamburg Marathon '23
Prediction
3:53:37
Achieved
3:50:00
-3 min
Harry Dudley
Athens Marathon '24
Prediction
2:51
Achieved
2:54:42
+3 min
Justin Hurt
Auckland Marathon '24
Prediction
36:10
Achieved
36:10
0 sec
Rui Nogueiro
São Silvestre de Lisboa 10km '24
Prediction
3:42:29
Achieved
3:41:38
-1 min
Stephen Murdoch
Amsterdam Marathon
Prediction
65:09
Achieved
63:42
-87 sec
Jake Barraclough
Marugame Half Marathon '24
Prediction
1:28:04
Achieved
1:28:31
+27 sec
Leif R
Barcelona Half Marathon '24
Prediction
2:42:57
Achieved
2:48:05
- 5 min
Michel van den Hoven
Berlin Marathon 24 PB
Prediction
3:07:12
Achieved
3:08:27
+ 1 min
Luke McAuley
Berlin Marathon 24 PB
Science-based, fully flexible training
kaizen's algorithms simplify complex sports science to guide your training and fit it in around your life
Improve
No races coming up? Set up a plan to stay motivated. From maintaining fitness to maxing out.
Improve
No races coming up? Set up a plan to stay motivated. From maintaining fitness to maxing out.
Improve
No races coming up? Set up a plan to stay motivated. From maintaining fitness to maxing out.
Marathon
Marathon
Marathon
Training that guides you from current to target fitness by race day, week by week
Training that guides you from current to target fitness by race day, week by week
Half marathon
Half marathon
Half marathon
Focus on consistently achieving your weekly training load target, rather than worrying about the specifics of sessions
Focus on consistently achieving your weekly training load target, rather than worrying about the specifics of sessions
5k & 10k
5k & 10k
5k & 10k
See how your race prediction updates after every run — and over time — to stay on track
See how your race prediction updates after every run — and over time — to stay on track
Runners love kaizen
30k+
Runners trust Kaizen
30k+
Runners trust Kaizen
93%
Race prediction accuracy
93%
Race prediction accuracy
4.8-stars
App Store rating
4.8-stars
App Store rating
Kaizen team - I just want to thank you all for a fantastic job. I ran CIM yesterday at almost the exact prediction from the app, 1:39 under to be exact, which checks out considering the net loss of elevation. The confidence I will have going into my next race will be in large part to the trust in the work you all are doing here. Keep it up. Amazing work
Kaizen hovered around 2:51 a week out from marathon, came in at 2:54:42 on a very windy day on quite hilly course so allowing for that I think prediction quite close and will use again for next one. Cheers!
Francois
2:54:42 Marathoner
Kaizen has been a game-changer for my running! Its race time predictions from 5km to marathon distances were spot-on, giving me confidence in my goals. The ability to train using the app’s training load feature has been invaluable, helping me improve my fitness while avoiding injuries. Highly recommend it to runners of all levels!!
Chris Powell
2:28:50 Marathoner
Kaizen hovered around 2:51 a week out from marathon, came in at 2:54:42 on a very windy day on quite hilly course so allowing for that I think prediction quite close and will use again for next one. Cheers!
Justin Hurt
2:54:42 Marathoner
This app has surprisingly become my go-to and main driver of training load to gauge and improve fitness gradually.
Rui Nogueiro
36:10 10km
Having followed the app for my 16 week block on the road to the Amsterdam Marathon with a set goal of a 4hr 11min marathon, I successfully achieved well in advance of it with a 3hr 41min result. Absolutely delighted with it! Kaizen helped greatly in getting me in the groove and fitness to smash it!
Stephen Murdoch
3:41:00 Marathoner
Kazien has been predicting a 3:07 for Barcelona and I ended up with 3:08 (Garmin predicted 3:21 !!). Have just used Kaizen after finding it only 5 weeks out and it’s really assisted me to have confidence in my first ever official race event. Really helped me push through and achieve a PB I have only ran 42km once before and that was 3:22.
Luke McAuley
3:08:27 Marathoner
Training built on your running history. Updated by the running you do.
BASELINE FITNESS
Starts with your training history and shape
kaizen analyses your recent running and race history to understand your current fitness
WEEKS OVER WORKOUTS
Dynamic load targets that build to your goal
Weekly targets update based on the intensity of your running. Run however best fits you and your schedule.
Progress over time
Always rerouting to keep you on track
When the plan changes, kaizen updates the path forward to keep you progressing responsibly
Flexible training
Flexible training that fits in around your life
Train how best suits you, following any training philosophy. For races or to improve.
Training built on your running history. Updated by the running you do.
BASELINE FITNESS
Starts with your training history and shape
kaizen analyses your recent running and race history to understand your current fitness
WEEKS OVER WORKOUTS
Dynamic load targets that build to your goal
Weekly targets update based on the intensity of your running. Run however best fits you and your schedule.
Progress over time
Always rerouting to keep you on track
When the plan changes, kaizen updates the path forward to keep you progressing responsibly
Flexible training
Flexible training that fits in around your life
Train how best suits you, following any training philosophy. For races or to improve.
Training built on your running history. Updated by the running you do.
BASELINE FITNESS
Starts with your training history and shape
kaizen analyses your recent running and race history to understand your current fitness
WEEKS OVER WORKOUTS
Dynamic load targets that build to your goal
Weekly targets update based on the intensity of your running. Run however best fits you and your schedule.
Progress over time
Always rerouting to keep you on track
When the plan changes, kaizen updates the path forward to keep you progressing responsibly
Flexible training
Flexible training that fits in around your life
Train how best suits you, following any training philosophy. For races or to improve.
Don’t finish another race disappointed
Don’t finish another race disappointed
Start training with kaizen today
Questions? Answers.
Questions? Answers.
Because Kaizen is updating the week based on the running you actually did. The visible distance target is a translation of the underlying load goal, so it can move as pace, elevation, and other training context change.
Why did my weekly target change?
One missed run does not mean the week is broken. kaizen is designed to keep the bigger picture in view and help you keep moving toward your goal.
If responsible, you can spread the missed load of the remaining days, or alternatively kaizen will distribute it over future weeks to keep you on track.
What if I miss a run?
No, kaizen is built around guiding the right amount of work, not forcing everyone into the same rigid session-by-session plan.
This means flexibility in how you want to train. You can choose any training approach under the sun, kaizen will always make sure your overall training load is responsible, and in line with what you need to achieve, week after week.
Do I need to follow exact sessions?
No. You can achieve the set training load to improve your race predictions however you like. Whether it's jogging 100% of the time, or mixing it up with more structured training. The important thing is to listen to your body and gain an understanding of what works for you.
The most important thing is to be consistent, so your training should be in service of that need for consistency.
Do I need to polarise my training or include specific interval sessions?
Absolutely. A running coach can be really useful to provide guidance from a human standpoint on everything training-wise, including providing you with a tailored training plan.
Kaizen can complement the coach to add a data-driven angle to your training and ensure that the training load you're achieving is in line with your running ambitions.
Can I use kaizen and work with a coach at the same time?
Currently, you can train for 5k, 10k, half marathon and marathon races using Kaizen.
In the future, Kaizen will be able to support custom distances from 3k to 50k.
What race distances does kaizen support?
Even if you aren't training for a race, you can use Kaizen to continue training with an improve plan. You can pull back or dial up your trianing, depending on whether you want to maintain fitness or max out.
Do I need to have an upcoming race to use kaizen?
It means the realistic upper end of what your current training could support under strong race-day conditions and good execution.
What does best-case prediction mean?
Because Kaizen is updating the week based on the running you actually did. The visible distance target is a translation of the underlying load goal, so it can move as pace, elevation, and other training context change.
Why did my weekly target change?
One missed run does not mean the week is broken. kaizen is designed to keep the bigger picture in view and help you keep moving toward your goal.
If responsible, you can spread the missed load of the remaining days, or alternatively kaizen will distribute it over future weeks to keep you on track.
What if I miss a run?
No, kaizen is built around guiding the right amount of work, not forcing everyone into the same rigid session-by-session plan.
This means flexibility in how you want to train. You can choose any training approach under the sun, kaizen will always make sure your overall training load is responsible, and in line with what you need to achieve, week after week.
Do I need to follow exact sessions?
No. You can achieve the set training load to improve your race predictions however you like. Whether it's jogging 100% of the time, or mixing it up with more structured training. The important thing is to listen to your body and gain an understanding of what works for you.
The most important thing is to be consistent, so your training should be in service of that need for consistency.
Do I need to polarise my training or include specific interval sessions?
Absolutely. A running coach can be really useful to provide guidance from a human standpoint on everything training-wise, including providing you with a tailored training plan.
Kaizen can complement the coach to add a data-driven angle to your training and ensure that the training load you're achieving is in line with your running ambitions.
Can I use kaizen and work with a coach at the same time?
Currently, you can train for 5k, 10k, half marathon and marathon races using Kaizen.
In the future, Kaizen will be able to support custom distances from 3k to 50k.
What race distances does kaizen support?
Even if you aren't training for a race, you can use Kaizen to continue training with an improve plan. You can pull back or dial up your trianing, depending on whether you want to maintain fitness or max out.
Do I need to have an upcoming race to use kaizen?
It means the realistic upper end of what your current training could support under strong race-day conditions and good execution.
What does best-case prediction mean?
Because Kaizen is updating the week based on the running you actually did. The visible distance target is a translation of the underlying load goal, so it can move as pace, elevation, and other training context change.
Why did my weekly target change?
One missed run does not mean the week is broken. kaizen is designed to keep the bigger picture in view and help you keep moving toward your goal.
If responsible, you can spread the missed load of the remaining days, or alternatively kaizen will distribute it over future weeks to keep you on track.
What if I miss a run?
No, kaizen is built around guiding the right amount of work, not forcing everyone into the same rigid session-by-session plan.
This means flexibility in how you want to train. You can choose any training approach under the sun, kaizen will always make sure your overall training load is responsible, and in line with what you need to achieve, week after week.
Do I need to follow exact sessions?
No. You can achieve the set training load to improve your race predictions however you like. Whether it's jogging 100% of the time, or mixing it up with more structured training. The important thing is to listen to your body and gain an understanding of what works for you.
The most important thing is to be consistent, so your training should be in service of that need for consistency.
Do I need to polarise my training or include specific interval sessions?
Absolutely. A running coach can be really useful to provide guidance from a human standpoint on everything training-wise, including providing you with a tailored training plan.
Kaizen can complement the coach to add a data-driven angle to your training and ensure that the training load you're achieving is in line with your running ambitions.
Can I use kaizen and work with a coach at the same time?
Currently, you can train for 5k, 10k, half marathon and marathon races using Kaizen.
In the future, Kaizen will be able to support custom distances from 3k to 50k.
What race distances does kaizen support?
Even if you aren't training for a race, you can use Kaizen to continue training with an improve plan. You can pull back or dial up your trianing, depending on whether you want to maintain fitness or max out.
Do I need to have an upcoming race to use kaizen?
It means the realistic upper end of what your current training could support under strong race-day conditions and good execution.
What does best-case prediction mean?
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