Weekly TSS Targets for Cycling Training: Annual TSS Planning for Different Goals

Introduction

Training Stress Score (TSS) is a training load quantification metric developed by Andrew Coggan based on power training concepts. A single TSS number integrates the duration and intensity of a ride, allowing the load of different workouts to be compared and accumulated using the same scale. However, TSS is only a tool — what matters more is knowing how much TSS you should accumulate in a week to match your goals, and how to reasonably distribute peaks and recovery across a year. Blindly chasing a high TSS is just as dangerous as blindly chasing high power — high-load training without a plan usually results in overtraining rather than progress.

The Logic Behind TSS Calculation

Basic Formula

TSS = (ride duration in seconds x Normalized Power x Intensity Factor) / (FTP x 3600) x 100

Simplified understanding:

• Riding 1 hour at FTP = 100 TSS
• 1 hour of Z2 aerobic riding ≈ 40-60 TSS
• 1 hour of sweet spot training ≈ 65-80 TSS
• 1 hour of threshold training ≈ 80-100 TSS
• 1 hour of HIIT workout ≈ 100-130 TSS

Intensity Factor (IF):

• IF = Normalized Power / FTP
• IF = 1.0 means the intensity of the entire ride is equivalent to FTP level

Recommended Weekly TSS by Goal

TSS Range from General Recreational to Advanced Amateur

Important: these numbers represent a “healthy growth range,” not a “the higher the better” target.

Periodization Framework for Annual TSS Distribution

A Typical Annual Training Cycle (Targeting an Event Like Wuling or a Major Race)

Assuming the target race is in June, for a serious amateur rider as an example:

Key principle: schedule 1 “recovery week” every 3-4 weeks, reducing TSS by 30-40%, allowing the body to truly supercompensate.

Distributing TSS Within a Week

The “80/20 Rule” Expressed in TSS

Power training research broadly supports an 80/20 intensity distribution: about 80% of training volume (TSS) should come from low-intensity aerobic work (Z1-Z2), with 20% from moderate-to-high intensity (Z3-Z5).

Example distribution for a weekly TSS of 500:

Example of a Common Weekly Plan TSS Distribution

Moderate training volume (weekly TSS = 450):

CTL, ATL, TSB: Interpreting the PMC Chart

Three Key Indicators

• CTL (Chronic Training Load): the weighted average of TSS over the past 42 days, reflecting your fitness base (your “aerobic fitness bank”)
• ATL (Acute Training Load): the weighted average of TSS over the past 7 days, reflecting current fatigue status
• TSB (Training Stress Balance) = CTL - ATL: a positive value indicates a fresh state, a negative value indicates fatigue

Managing TSB Before a Race

Goal of “tapering” 7-14 days before a race: gradually raise TSB from -15 to -25 during the build phase back up to +10 to +20, while making sure CTL does not drop drastically (reduce volume but maintain a small amount of high intensity).

Practical Recommendations

• Do not chase high TSS in the first quarter: a weekly CTL increase of no more than 5-8 TSS is a safe upper limit — rapid increases are a major cause of injury
• TSS only accounts for cycling training — stress from other sports needs separate consideration: if you also run or swim at the same time, actual fatigue is far higher than what TSS shows
• Recovery week TSS should not be too low: reducing to 60-70% of normal is sufficient — stopping training entirely actually causes the body to “lose direction”
• Free tool recommendation: intervals.icu offers PMC chart functionality similar to TrainingPeaks, completely free and supports Strava/Garmin sync
• Seasonal adjustment: during Taiwan’s hot summer, even when TSS targets are met, the body actually experiences greater heat stress, so intensity targets should be moderately reduced

Conclusion

TSS is an excellent tool for quantifying training load, but it is only a means, not an end. What truly matters is finding a balance between appropriate stress stimulus and sufficient recovery through reasonable annual TSS planning, so you can continue to progress. Build your own “feel for TSS” — not just watching the numbers, but also paying attention to how your body responds to load — so that your training system can truly serve your cycling goals.

Related Reading

• TSS Training Stress Score Calculation and Application: Quantitative Management of Weekly Training Volume
• A Complete Analysis of the Three Major Training Load Indicators: TSS, CTL, ATL
• Complete Guide to TSS, CTL, ATL, TSB: Calculation Principles and Applications of Training Stress Indicators
• TSS, the Gold Standard Indicator of Power Training: A Scientific Validity Study of the Training Stress Index