20-minute HIIT on a non-smart spin bike

Long enough for a warm-up, a block of real efforts, and a cooldown. Short enough for a home bike in a spare room. You do not need a smart trainer to change load every 45 seconds — you turn the knob.

Apex HIIT interval workouts put those changes on the screen. The outline below is a protocol you can also build as a custom session. It is not a claim about any one named class in the library.

• 0:00–4:00 warm-up. Light dial, cadence rising until you can talk but not sing.
• 4:00–16:00 work. Eight rounds of 45 seconds hard, 45 seconds easy. Hard: add dial and lift cadence until speech is broken. Easy: ease the knob toward freewheeling and drop RPM.
• 16:00–20:00 cooldown. Easy spin, then brake the flywheel before you step off.

The work intervals should feel like a strong push or drive, not an all-out blast every round. Save sprint/blast cues for shorter hits if you use an Apex class that asks for them. If cadence collapses, ease a quarter turn — finishing the block with form beats grinding.

Recoveries only work if the dial comes off. Sitting on the work resistance and “soft pedalling” is still a threshold ride.

Ride a beginner session first, and skim how to use a resistance knob. Budget home bikes (the sort sold alongside JLL, Decathlon and Argos ranges) respond well to this clock; see the budget dial-bike guide.

Log in or create a free account and ride with on-screen dial and cadence cues.