5km on the bike in a little under 10 minutes.
Then the killer intervals: 1 km at 12.5km/hr, 2 minute walk, 1 km at 13.5 km/hr, 2 minute walk, 1 km at 14.5km/hr, rising to 15 at half way, then 15.5 km/hr then 16 for the last 100m. Killer. Total 3.4km
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