Stryd Adaptive Training is a flexible, power-based training system that automatically builds and adjusts a training plan around your fitness level, schedule, and goals. Unlike a fixed training plan, Adaptive Training responds to how you’re actually training, updating your workouts as your Critical Power changes, accommodating schedule changes at the start of each phase, and intelligently adapting when life gets in the way.
Adaptive Training works best for athletes who want structured, data-driven training without being locked into a rigid schedule. It’s a great fit whether you’re preparing for a specific race, building fitness between race cycles, or simply looking for purposeful day-to-day guidance.
Before You Begin
A few things to have in place before you start:
Update your Stryd app: Make sure you have the latest version of the Stryd mobile app installed. New Adaptive Training features are added regularly.
Pause any existing training plan: The Stryd system only supports one active training plan at a time. If you are currently using a Stryd Training Plan or have imported a plan from TrainingPeaks, pause it before starting Adaptive Training.
Finish any upcoming race first: If you have a race at the end of your current plan, the Stryd team recommends completing that race before switching to Adaptive Training.
Getting Started with Stryd Adaptive Training
You can opt in to Stryd Adaptive Training by following the instructions below:
Open the Stryd mobile app.
Select “Set Goal” in the green Train Smarter tab.
Select “Adaptive” when asked how you want to train.
Choose your training goal. You will be asked whether you are training for a specific Event A race, a race distance, or general fitness maintenance. If you have a race coming up, selecting your Event A race here will allow Adaptive Training to build your entire plan around that race date. If you don’t have a race yet, that’s fine, you can add one later, and the plan will adjust automatically.
Customize your training schedule. Choose how many days per week you want to run and the maximum number of minutes you want to run during your peak training week. This peak duration represents the highest weekly volume you will reach; most weeks will be shorter as the system builds up to it gradually.
Tell the system about your recent training consistency. You will be asked whether you have been running consistently and injury-free for the past 4 weeks. This answer is important: it determines which training phase you will start in and how quickly the system introduces harder workouts. If you have been running consistently without injury, select “Yes.” If you’ve had a break, are returning from injury, or are new to running, select “No.” See the section on Training Phases below to understand what happens next.
Confirm your Critical Power (CP). Adaptive Training relies on an accurate CP to assign the right workouts. If you haven’t done a CP test in the last 2 weeks, the Stryd team recommends completing a CP Estimate before starting. The system will walk you through a single-run estimate if needed. An inaccurate CP will result in workouts that feel too easy or too hard; getting this right from the start makes a big difference.
Select a start date. You can begin as early as today.
Review your plan overview. You will see a high-level view of your training phases and how long you will spend in each. The specific workouts assigned to you will depend on which phase you are in at any given time.
Select “Start Plan” to begin.
At the start of each phase, update your weekly structure. When you transition into a new phase, you will have the opportunity to adjust your training days and weekly schedule. This is a great time to accommodate changes in your work schedule, family commitments, or fitness level.
Understanding Your Training Phases
Adaptive Training is organized into phases, each with a specific training focus. The phases you move through will depend on your starting fitness, your race timeline, and your recent training history.
This is an example of a 12-week Adaptive Training Plan. This basic plan will scale up or down depending on your total plan length.
Phase | Type | Duration | Training Load |
Foundation | Base | 14 days | 70% |
Aerobic | Base | 21 days | 85% |
Power | Base | 21 days | 100% |
Race-Specific | Peak | 14 days | 95% |
Taper | Recovery | 7 days | 65%-40% |
Recovery | Recovery | 7 days | 75% |
Adaptive Training Plan Phases and Phase Types:
Base Phases
Foundation: "Build your initial aerobic base and adapt to consistent training." This phase is assigned to athletes who are returning to running after time away, recovering from injury, or are new to structured training. Expect mostly easy runs. The goal is to build the habit of consistent running before adding harder efforts.
Aerobic: "Further develop your aerobic capacity with a mix of easy and moderate efforts." This is the starting phase for athletes who have been training consistently. Expect easy runs, moderate workouts, and weekly long runs. This phase establishes the aerobic foundation that everything else is built on.
Power: "Enhance neuromuscular power and running economy through targeted high-intensity work." Once your aerobic base is in place, this phase introduces more structured, higher-intensity workouts. Think intervals, fartleks, and threshold work. The goal is to improve your ability to run fast and efficiently.
Peak Phases
Prep: "Consolidate your fitness and sharpen speed with race-pace intervals." You’re approaching your race and the workouts become more specific and race-like.
Race-Specific: "Fine-tune your fitness with workouts that mimic the demands of your target race." These workouts are closely tailored to your goal race distance and conditions.
Test Phases
Estimate: "Perform a specific workout to get an updated estimate of your current fitness." This phase schedules a structured CP test to check that your power zones are still accurate as your fitness evolves.
Test: "Complete a formal testing protocol to accurately assess your current critical power." A more comprehensive fitness test used in longer training cycles.
Recovery Phase
Recovery: "Allow your body to rest, adapt, and prepare for the next block of training." Lower-intensity running to absorb the training load from the previous phase. This is where fitness gains are actually realized.
Maintenance Phase
Maintain: "The intensities are intended to maintain your fitness without adding stress." Used between race cycles or when you want to stay fit without building toward a specific goal.
Note: Between the base and peak phases, the system may schedule a testing week. This is how Adaptive Training verifies that your CP is still accurate as your fitness improves and ensures that upcoming workouts are calibrated correctly.
Peak Weekly Duration
During setup, you select a peak weekly duration. This is the maximum volume you will run in a single week across your entire training cycle. Most weeks will be shorter; the system gradually builds toward this peak and then tapers back down as you approach your race.
The number of runs per week you select also determines how that total volume is distributed. For example, if you select 5 runs per week and a peak duration of 5 hours, the system will schedule roughly 60 minutes per session at peak.
You will have the opportunity to add or reduce training days at the start of each new phase, so if your schedule changes during the plan, you’re not locked into your original selection.
CP Updates Based on RPE Post-Run Insights
After every run, you can submit a Post-Run Report that includes your RPE (Rate of Perceived Effort). The Stryd system uses this feedback to check whether your Critical Power is still accurate. If the effort you reported doesn’t match what your power data would suggest, the system will flag your CP and offer you options to re-evaluate.
This is one of the most powerful features of Adaptive Training. It means your training zones are always calibrated to how your body is actually performing, not just how it performed at your last formal test.
Here’s how to submit your RPE:
Open the Stryd mobile app.
Select the Calendar icon.
Select the Run Report icon on the activity you want to report.
Fill out the Post-Run report and include your RPE.
For a detailed explanation of how the CP accuracy system works, see the support article: CP Accuracy Flow for Adaptive Training.
Pausing and Reactivating Your Adaptive Training
Life happens; travel, illness, and injury can all interrupt a training cycle. With Adaptive Training, you don’t need to worry about manually rescheduling missed workouts. The system calculates how long you’ve been inactive and recommends an appropriate way to return based on research-backed fitness loss thresholds.
The 4 Categories of Pause Logic:
When you reactivate your plan, the system will recommend one of the following based on how long you’ve been inactive:
Time Away | Stryd Recommendation | Why? |
0-7 days | Skip Missing days | A break of up to one week has no meaningful impact on fitness |
8-14 days | Restart Current Phase | Minor fitness loss begins after about a week |
15-28 days | Start from Aerobic Phase | After two to four weeks off, noticeable aerobic fitness loss occurs. |
29+ days | Start from Aerobic Phase | After more than four weeks away, significant fitness and muscle strength loss is expected. |
What the system does:
0–7 days; Skip Missing Days: The system moves the plan forward as if those days didn’t happen and you pick up right where you left off.
8–14 days; Restart Current Phase: Restarting your current phase gives you a solid foundation before moving forward. You’ll re-do the phase you were in rather than jump ahead.
15–28 days; Start From Aerobic Phase: The system returns you to the Aerobic phase to rebuild your base before reintroducing intensity.
29+ days; Start From Recovery Phase: The system recommends starting from a Recovery phase with a full ramp-up, including the Foundation phase if needed.
Special Cases Stryd Can Consider:
Injury: If you mark yourself as injured, the time-based logic above is overridden and the system will always recommend starting from Recovery to ensure a safe return, regardless of how long you were out.
Race-targeted plans: If your Event A race is still in the future, the system will prioritize getting you to the start line by recommending Skip Missing Days. If your race date has already passed, it will recommend starting from Recovery.
If the system can’t determine your exact inactivity period, It defaults to Skip Missing Days to keep you moving forward.
If you haven’t opened the Stryd app in a while, the next time you open the app, you will be asked whether you’d like to continue with your Adaptive Training plan.
How to Pause and Reactivate:
Open the Stryd mobile app.
Select your Adaptive Training card.
Select “Pause” at the bottom of your Training Parameters.
When you’re ready to return, select “Reactivate.” The system will present you with a resume recommendation based on how long you’ve been away.
Editing or Ending Your Adaptive Training Plan
If you need to change your weekly structure or stop using Adaptive Training entirely, you can do so at any time.
Open the Stryd mobile app.
Select the green Adaptive Training button.
Select “End Plan” to remove Adaptive Training from your account, or select “Edit” to change your weekly training structure.
When Should I Use Adaptive Training?
Adaptive Training is a great choice in many situations:
In place of a traditional Stryd Training Plan
After completing a Stryd race plan, while you recover and build toward the next one
Before starting a Stryd race plan, build fitness ahead of structured race prep
In place of the Stryd Build and Maintain Fitness Plan
Whenever you want purposeful, data-driven training without a fixed schedule
If you are currently in a Stryd race plan with a race at the end, the Stryd team recommends finishing that plan and completing the race before switching to Adaptive Training. For instructions on pausing a Stryd Training Plan, see the support article: How to Use Stryd Training Plans.
Share Your Feedback
The Stryd team would love to hear what you think about Adaptive Training, what you like, what you don’t, and what you’d change. Follow this link to share your feedback in our survey.