Many riders use a turbo trainer in winter or to warm up on before a race. The uncomplicated Minoura V270 magnetic trainer is just the ticket.
It has seven resistance settings that you can use in combination with your gears to get just the right amount of intensity before you greet the starter. It’s smooth enough for general warming up (not sprinting) and has adjustable legs so you can use it on uneven surfaces.
It’s relatively quiet too, which is a bonus if you’re warming up in the early morning.