hello, this winter I want to add strength. I need help developing a cycling-specific (30-40min) workout to do 3x a week. This would only be for about 3 months then when base building begins, I can maintain strength with push-ups and sit-ups.

I want to keep it to 6 or so exercises.

leg curls
leg extension
leg press
bench press
pull downs
bent row
situps

any tips?
how can I improve this?
what do you do?