PoorInRichfield Had been off the bike due to illness and scheduling issues. But I had been riding to work the last week and I remembered your post on the way home yesterday. I was on my main commuter, a 2015 Charge Plug (non-electric) 700x35 with drop bars, fenders and a back rack. I hit one of the sprint-friendly stretches and...
...well, it reminded me of when I was 43 and played softball for the first time in 13 years. I knocked the ball into short center field and started running, but my legs felt like lead. I was biking every day so I should have been faster...but no. By the end of the season I was quicker around the bases, and fast enough to field balls, but I never attained "quickness".
So here I am at 63, still biking almost every day and I started to sprint...with an imperceptible rise in my cadence. I got up off the saddle and, nothing.
But I am not giving up. I'm gonna get on one of my light-weight bikes and try sprinting. I've still got the strength (and gearing) to power up the local hills, and I've still got the stamina to ride 30 miles without thinking twice, but the sprinting/speed thing...It's gonna take some work.