About Training Effect; Performance Condition - Garmin FORERUNNER 945 LTE Owner's Manual

About Training Effect

Training Effect measures the impact of an activity on your aerobic and anaerobic fitness. Training Effect
accumulates during the activity. As the activity progresses, the Training Effect value increases. Training Effect
is determined by your user profile information and training history, and heart rate, duration, and intensity of your
activity. There are seven different Training Effect labels to describe the primary benefit of your activity. Each
label is color coded and corresponds to your training load focus
feedback phrase, for example, "Highly Impacting VO2 Max." has a corresponding description in your Garmin
Connect activity details.
Aerobic Training Effect uses your heart rate to measure how the accumulated intensity of an exercise affects
your aerobic fitness and indicates if the workout had a maintaining or improving effect on your fitness level.
Your excess post-exercise oxygen consumption (EPOC) accumulated during exercise is mapped to a range of
values that account for your fitness level and training habits. Steady workouts at moderate effort or workouts
involving longer intervals (>180 sec) have a positive impact on your aerobic metabolism and result in an
improved aerobic Training Effect.
Anaerobic Training Effect uses heart rate and speed (or power) to determine how a workout affects your ability
to perform at very high intensity. You receive a value based on the anaerobic contribution to EPOC and the type
of activity. Repeated high-intensity intervals of 10 to 120 seconds have a highly beneficial impact on your
anaerobic capability and result in an improved anaerobic Training Effect.
You can add Aerobic Training Effect and Anaerobic Training Effect as data fields to one of your training
screens to monitor your numbers throughout the activity.
Training Effect Aerobic Benefit
From 0.0 to 0.9 No benefit.
From 1.0 to 1.9 Minor benefit.
From 2.0 to 2.9 Maintains your aerobic fitness.
From 3.0 to 3.9 Impacts your aerobic fitness.
From 4.0 to 4.9 Highly impacts your aerobic fitness.
Overreaching and potentially harmful without
5.0
enough recovery time.
Training Effect technology is provided and supported by Firstbeat Technologies Ltd. For more information, go
to www.firstbeat.com.

Performance Condition

As you complete your activity, such as running or cycling, the performance condition feature analyzes your
pace, heart rate, and heart rate variability to make a real-time assessment of your ability to perform compared
to your average fitness level. It is approximately your real-time percentage deviation from your baseline VO2
max. estimate.
Performance condition values range from -20 to +20. After the first 6 to 20 minutes of your activity, the device
displays your performance condition score. For example, a score of +5 means that you are rested, fresh, and
capable of a good run or ride. You can add performance condition as a data field to one of your training
screens to monitor your ability throughout the activity. Performance condition can also be an indicator of
fatigue level, especially at the end of a long training run or ride.
NOTE: The device requires a few runs or rides with a heart rate monitor to get an accurate VO2 max. estimate
and learn about your running or riding ability
Heart Rate Features
(Training Load Focus, page
Anaerobic Benefit
No benefit.
Minor benefit.
Maintains your anaerobic fitness.
Impacts your anaerobic fitness.
Highly impacts your anaerobic fitness.
Overreaching and potentially harmful without
enough recovery time.
(About VO2 Max. Estimates, page
48). Each
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