Glossary of Training Terms
Heart Rate
Heart rate simply describes how fast your heart is beating. Expressed in terms of beats per minute, it is widely used to understand the intensity of your efforts during physical activity.
Heart Rate Zone
Keep tabs on the intensity of your effort using these zones as your guide. You can use them to set goals, plan workouts, and modify your performance along the way.
VO2max
This number describes your current cardiorespiratory fitness level. It is the maximum rate at which you can import oxygen, transport it to your muscles, and convert nutrients into energy aerobically.
Training Effect
Training Effect scores (0.0-5.0) provide real-time insight into how your current workout will likely influence the future development of aerobic and anaerobic performance capacity.
| Run Type | Typical Aerobic TE | Typical Anaerobic TE |
| Long, slow distance | 2.0 - 3.0 Maintaining Aerobic Fitness | 0 No Anaerobic Benefit |
| 20-minute threshold | 3.5+ Improving Lactate Threshold | 0 No Anaerobic Benefit |
| Lactate threshold intervals | 3.0+ Improving Lactate Threshold | 0 - 2.0 Minor Anaerobic Benefit |
| Sprint intervals 10 x 50 meters @150-200% VO2max | 0 - 2.0 Minor Aerobic Benefit | 2.0 - 3.0 Maintaining Speed |
| Speed intervals 10 x 400 meters @100-105% VO2max | 2.0 - 4.0 Improving Aerobic Fitness | 3.0 - 4.0 Improving Economy and Anaerobic Fitness |
| Speed intervals 10 x 400 meters @110-115% VO2max | 2.0 - 4.0 Improving VO2max | 4.0+ Highly Improving Anaerobic Fitness |
| 800-meter race | 2.0+ Maintaining Aerobic Fitness | 2.5+ Maintaining Anaerobic Fitness |
| 5K race | 3.5+ Improving VO2max | 1.0 - 2.0 Minor Anaerobic Benefit |
| 10K race | 4.0+ Highly Improving VO2max | 0.0 - 2.0 Minor Anaerobic Benefit |
Aerobic Training
Aerobic training is any type of physical activity performed with the intensity and duration necessary to improve heart, lung, and muscle function. It is an essential part of endurance performance.
Anaerobic Training
Anaerobic training improves your ability to perform and repeat high-intensity efforts, where energy demands exceed aerobic capacity. It is tied to sprints, interval workouts and sports performance.
Recovery Time
Maximize the effectiveness of your workouts by ensuring adequate recovery. This countdown timer updates at the end of each workout to reveal when you will be ready for a seriously hard challenge.
Training Load
The combined physiological strain of all your activities recorded over the past 7 days is displayed in a single number. Guide your efforts to ensure the right level of challenge for you personally.
Training Status
Changes in your VO2max fitness are interpreted using trends in your Training Load data. See when your training is productive or unproductive, when you are peaking, recovering, detraining, and more.