I got a Duo Tap Cadence and speed sensor for my Garmin FR60. While I have enjoyed my mph for a guy just starting and at 55 years of age I found my cadence to be on the low side at 75. Reading here and on the training video that came with my Cycle Ops I should be at 90 or better. Some here I notice are running over 110. So I am shifting down to get my cadence with 15 minute runs. I shifted down until I started to bounce, then shifted back up one gear and spun at 90. I did one this morning and achieved the 90 that I wanted for 15 minutes. I would like to eventually see 100 or better so now do I increase time at 90 first or do I try and stay with the 15 minutes and get to 100 before I increase the time or speed?