Time trial/Tri training
Just to add that the 80-85% HR intervals are about right – but do them with between 1 min and 1.5 mins light spinning – 10 mins between is too long…
And be sure not to use the turbo to ride too hard in the winter base building period, use it to hone your position, work on single leg drills… better still get some rollers and really feel what its like to have a sense of balance and finesse! JB