Terminology

FTP

Funtional Threshold Power

FTP represents the maximum power a rider can sustain without experiencing rapid fatigue. It serves as a crucial metric in performance measurement and training design. Exceeding this threshold results in quick fatigue accumulation, making it difficult to maintain power for extended periods.

TTE

Time to Exhaustion

TTE refers to the amount of time a rider can sustain power at FTP. While FTP was historically defined with a standard 60-minute duration, this didn't accommodate other disciplines or riders with different characteristics. With TTE, training and analysis can now be tailored to each rider’s unique situation and characteristics.

RP

Riduck Power

This metric emphasizes a higher proportion of high-intensity activities and a lower proportion of low-intensity activities. The result is a power calculation that more accurately reflects the load on the body than a simple average power measurement.

IF

Intensity Factor

The Intensity Factor (IF) is a numerical representation of how intense an activity is, with higher values indicating more intense riding. IF is calculated as (RP/FTP). An IF close to 1 means the rider is operating at a power near their FTP.

TSS

Training Stress Score

TSS measures the fatigue from a training session. When riding for 1 hour at FTP, 100 TSS is accumulated. A lower intensity or shorter duration results in lower TSS, while higher intensity or longer duration leads to higher TSS.

Fitness

Fitness represents the accumulated training load over a longer period (chronic training load), typically over the past 12 weeks. It reflects overall endurance and the body’s adaptation to training.

Fatigue

Fatigue refers to the recent training load (acute training load) accumulated over the last 7 days. It shows how much impact recent training has had on the rider's body.

Balance

Balance is the difference between Fitness and Fatigue. A higher balance indicates a better overall condition, while a lower balance signals fatigue.