Froth, trying to learn a different style of pedalling whilst riding on the road up lots of inclines is probably the most awkward way to go about it.
If you are determined to try and increase cadence, ride more in zone 1/2 in the quest to improve your cardiovascular engine. My honest opinion is get a decent indoor setup.
Use a training program (trainer road, Wahoo training) through the winter, re-learn pedalling technique, so your action is smooth and circular, this will eliminate 'bouncing'. Pedalling smoothly, but quickly shouldn't cause knee issues (if knees are in good condition).
Ride the summer out normally and use cold months to train
all the best
If you are determined to try and increase cadence, ride more in zone 1/2 in the quest to improve your cardiovascular engine. My honest opinion is get a decent indoor setup.
Use a training program (trainer road, Wahoo training) through the winter, re-learn pedalling technique, so your action is smooth and circular, this will eliminate 'bouncing'. Pedalling smoothly, but quickly shouldn't cause knee issues (if knees are in good condition).
Ride the summer out normally and use cold months to train
all the best