How to Test Your FTP at Home

A bad test day produces a bad FTP, which misaligns your training zones for weeks. Proper preparation matters more than which protocol you pick.

• Rest. Take a rest day or very easy ride the day before. Do not test on tired legs.
• Eat normally. Have a regular meal 2-3 hours before the test. Nothing new or unusual.
• Hydrate. Start the test well-hydrated. Have a bottle within reach.
• Equipment. Use a power meter or smart trainer in ERG-off (or resistance) mode. Ensure it is calibrated or zero-offset before starting.
• Environment. If testing indoors, use a fan. Heat significantly reduces power output -- studies show a 5-8% drop in threshold performance in hot conditions (Periard et al., 2015).
• Consistency. Test under the same conditions each time. Indoor vs outdoor, morning vs evening, fuelled vs fasted -- keep these constant for meaningful comparisons.

The warm-up is the same for all four protocols:

1. 15 minutes at Zone 2 (easy, conversational pace)
2. 3 x 1 minute at Zone 4 (firm effort) with 1 minute easy between each
3. 5 minutes easy spinning
4. Begin the test effort

Total warm-up time: approximately 25 minutes. Do not skip this. Cold muscles produce lower power and increase injury risk.

This is the gold standard field test. Ride as hard as you can sustain for exactly 20 minutes. The 0.95 multiplier accounts for the fact that most riders can hold slightly higher power for 20 minutes than they could for a full hour.

Pacing tips:

• Start at what feels like 90% of your maximum effort. You should feel controlled, not desperate.
• The first 5 minutes should feel uncomfortable but manageable. If you are already struggling, you started too hard.
• Aim for negative splits: slightly faster in the second half than the first.
• The last 3-4 minutes should be near-maximal. If you have energy left at the end, you held back too much.

Best for: Experienced cyclists who can pace a sustained effort. This test requires good discipline and produces the most reliable results when done correctly.

Worst for: Beginners who have never paced a time trial. A common failure mode is going too hard in the first 5 minutes and collapsing.

Ride two 8-minute all-out efforts with 10 minutes of easy recovery between them. Average the power from both efforts, then multiply by 0.90.

Best for: Riders who struggle with 20-minute pacing. The shorter duration is more forgiving of pacing mistakes, and the second effort provides a consistency check.

A single 5-minute maximal effort. Multiply by 0.85. This test is quick and brutal, but the larger multiplier introduces more error because the ratio between 5-minute and 1-hour power varies significantly between riders.

Best for: Quick checks or riders with limited time. Not recommended as a primary testing method.

Start at a low power and increase by a fixed increment (usually 20 W) every minute until you cannot continue. Take 75% of the power you held during the last fully completed minute.

Best for: Beginners. No pacing required -- you just keep going until you stop. Many smart trainer apps (Zwift, TrainerRoad) have built-in ramp test workouts.

Limitation: The ramp test favours riders with high anaerobic capacity. It can overestimate FTP for sprinter types and underestimate it for diesel-engine endurance riders.

1. Enter it into the FTP calculator to apply the correct multiplier and get your estimated FTP.
2. Generate your power zones so you have specific watts targets for each training intensity.
3. Check your W/kg to understand where your result sits on the performance scale.
4. Record the date, conditions, and protocol so your next test is directly comparable.
5. Plan your next test for 4-8 weeks from now, at the end of your current training block.