Just got a power meter and I am trying to find a structure to increase my cycling fitness. My races are grand fondo/century rides. The issue is my work schedule. 3 days on, 4 days off, 4 days on, 3 days off. The hours I work are around 14 hrs per day with commute. How can I structure a cycling schedule with the limited "off" days back to back and little time on my work days?