10-Mile Time Trial Practice: Outdoor Race Pace Effort

Session Overview

The 10-mile time trial is one of the most useful benchmark workouts a triathlete can do — it gives you a real-world test of your cycling fitness that translates directly to race performance. This 60-minute session is built around a hard 10-mile (16km) effort on a flat or gently rolling road, bookended with a proper warm-up and cool-down. Use it to test your FTP zone, practise your aero position, and get an honest picture of your bike fitness.

What You’ll Need

• Road or TT bike in good mechanical condition
• Flat to gently rolling 10-mile route (or a loop you can repeat)
• GPS computer with speed or power data
• Power meter or heart rate monitor
• Two water bottles

Warm-Up (15 minutes)

Start with 10 minutes at easy Zone 2 spinning, keeping cadence above 90rpm. At the 10-minute mark, add 3×30-second efforts at race intensity with 60 seconds easy between each. These activate your fast-twitch fibres and prime your cardiovascular system for the hard effort ahead. Take a final 2 minutes easy before beginning the TT.

Main Set

Ride 10 miles (16km) as hard as you can sustain from start to finish. This is a maximum sustained effort — not an all-out sprint. Aim for power around 95-105% of your FTP if you have a power meter. Going by heart rate, target high Zone 4 to low Zone 5.

• Miles 1-2: Resist the urge to overcook the start — begin at target power and ease into the effort
• Miles 3-7: Hold your target power or HR zone. This is where the session is won or lost.
• Miles 8-10: If you have anything left, push to the finish. Don’t save anything for the cool-down.
• Record your total time and average power or heart rate for future comparison

Cool-Down (15 minutes)

Spin easily back at Zone 1 — resist the urge to push. Your legs need 10-15 minutes of easy flushing after a hard effort to accelerate recovery. Once home, stretch your hip flexors, quads, and lower back — areas that tighten up during a sustained TT position.

Coaching Notes

• For fair comparison over time, always use the same 10-mile route. Repeat this test every 4-6 weeks to track progress.
• Pacing is critical — starting too fast leads to a dramatic blowup. If you fade badly in the last 2 miles, you went out too hard.
• Aero position matters: if you have clip-on bars, stay in position throughout the main effort. Seconds saved in aerodynamics add up significantly over 16km.
• Make it easier: Shorten to a 5-mile time trial at the same intensity and use it as a weekly benchmark.
• Make it harder: Try 2×10-mile efforts with 10 minutes easy recovery between — a genuine test of cycling endurance.
• Target RPE: 8-8.5 out of 10. Hard and controlled throughout, not maximal.