Single-Speed Strength Builder: 45-Minute Turbo Trainer Session

Session Overview

This 45-minute single-speed strength turbo session develops raw cycling power through sustained low-cadence, high-torque efforts. By locking into a heavy gear and grinding at 60-70 rpm, you train your legs to produce force under load — translating directly to stronger climbing performance and improved sustained power output on race day.

What You’ll Need

• Smart turbo trainer or indoor bike
• Cycling shoes, kit and fan
• Heart rate monitor (cadence sensor optional but useful)
• Hydration — 750ml minimum for 45 minutes

Warm-Up (10 minutes)

10 minutes easy Zone 2 riding at high cadence — aim for 90-100 rpm. Use a light gear and let your legs spin freely. Include 4 x 10-second moderate effort builds during the final 3 minutes, building to 75% effort, to activate the higher-power muscle fibres you will use in the main set. Cadence during builds: 85-90 rpm.

Main Set

Switch to a significantly heavier gear (on a smart trainer, set resistance to manual mode or target 80-85% FTP at 60-65 rpm). If you use a dumb trainer, select the large chainring and a middle cog that forces effort at 60-65 rpm.

• 3 x 8 minutes at 60-65 rpm, Zone 4 effort (RPE 7/10) — seated throughout, focus on smooth, even pedal strokes. Push from the top of the pedal stroke and pull through at the bottom. Rest: 5 min easy high-cadence spin between each interval.
• Optional: Final 8-minute interval — add 2 x 1 minute standing efforts at 55-60 rpm within the interval. This recruits glutes and hip extensors more fully and simulates a road climb.

Cool-Down (10 minutes)

Return to your lightest gear and spin at high cadence (95-100 rpm) for 10 minutes. This flush spin clears lactate and restores blood flow to the legs. Resist the urge to just stop — the cool-down is as important as the main set for recovery quality the following day.

Coaching Notes

• Never let cadence drop below 55 rpm — below this threshold, the session shifts from strength training to joint stress. If cadence drops, lighten the gear slightly.
• Knee tracking is critical on low-cadence efforts. Ensure your knee tracks over your second toe throughout the pedal stroke, particularly at the top and bottom of each rotation.
• Do this session once per week maximum — low-cadence strength work requires 48-72 hours to recover from fully before a quality bike session.
• Beginners: reduce intervals to 2 x 6 min at 65-70 rpm with 6 min recovery. Total time: 40 minutes.