Indoor Cycling Guide: Getting the Most from Your Turbo
Why Train Indoors?
Indoor cycling has transformed triathlon training. No traffic, no weather worries, and complete control over your workout intensity. Whether you are using a basic wheel-on trainer or a smart direct-drive unit, the turbo is one of the most effective training tools available to triathletes.
Setting Up Your Space
Your indoor setup does not need to be elaborate, but a few essentials make a big difference to the quality of your sessions.
- Fan: A powerful fan is not optional. Without airflow, your core temperature rises rapidly and your power output drops. A floor-standing industrial fan is ideal
- Mat: A trainer mat protects your floor from sweat and vibration. It also reduces noise if you live in a flat
- Towel: Drape one over your handlebars. Sweat corrodes components faster than you might expect
- Entertainment: A screen for Zwift, TrainerRoad, or even a film makes long sessions far more bearable
Choosing a Trainer
There are three main types of indoor trainer, each with different price points and features.
- Wheel-on trainers (£100-300): Clamp onto your rear wheel. Affordable and functional, but less accurate for power measurement and louder than direct-drive options
- Direct-drive trainers (£300-900): Your rear wheel comes off and the trainer connects directly to your drivetrain. Quieter, more accurate, and more realistic road feel. The Wahoo KICKR CORE 2 and Tacx Flux are popular choices in this range
- Smart bikes (£1,500+): Standalone units with integrated power and shifting. The most convenient option but a significant investment
Making Indoor Sessions Count
The biggest advantage of the turbo is structure. Every pedal stroke can be purposeful. Here are three session types that deliver real fitness gains.
- Sweet spot (45-60 min): Sustained efforts at 88-93% of FTP. High training benefit with manageable fatigue
- VO2max intervals (30-45 min): Short, intense efforts at 106-120% of FTP with equal rest. Builds top-end power
- Endurance rides (60-90 min): Steady efforts at 65-75% of FTP. Builds aerobic base and fat oxidation
Keep indoor sessions to 90 minutes maximum. Beyond that, the mental and physical fatigue from training without natural airflow and scenery outweighs the benefit. Save your longer rides for the road.
