Something about the Garmin Speed & Cadence sensor gives me trouble every single time I use it on the trainer. I have to fiddle with it, poke its reset button, take its battery out and try a different one, push "resynch" on the Garmin and and wait, then possibly try some or all of these two or three times until eventually it works. Today was no different Then after fifteen minutes or so I realised that the rear tyre on the roadie was flat, so out of the trainer, off with the tyre only to discover a puncture... on a wheel that hasn't been on a road for over a year. Couldn't find a spare 700x23 tube so I patched it, but three or four minutes later it was flat again, the patch was on a wrinkly bit of moulding. Ransacked house & shed and still couldn't find a spare, or at least I did, but it was so old that it had perished, so I repatched the original and then found that the track pump was dead and wouldn't pump Presta valves, only Schraeder. More hunting around to find a working frame pump on another bike and get enough air into the tube until I could try again at the track pump, this time it decided to work. Tyre pumped up again, third time, so back on the bike I don't think I quite matched the suggested training session of nice neat 10 minute efforts and 5 minute recoveries