Thursday, December 28th
1:00PM GMT
Day 4 of Zwiftmas - Group workout
Group Workout
12 days of Zwiftmas
Get fit together with thousands of other Zwifters by joining the 12 Days of Zwiftmas.


Zwifters line up in the starting area just like a normal event and once the event starts, workout mode begins. Everyone stays together regardless of power output. That's right, if you're outputting 100W and another Zwifter is outputting 400W you will stay in exactly the same position relative to each other. Only if you stop pedaling and fall 6 meters behind the group will the rubber-banding stop.


This is a hard 55 minute session that will open up the lungs for sure. I have named it Watt Bombs because after the ramp in speed for 60 seconds you just get out of the seat and drop some watts for 15 seconds. This session starts with a small set of 40/20’s to open the legs and lungs up before we attack 4 Sprints. An explosive power session that we would typically do 1x a week during the season to keep on top of our peak power.

Length: 55 minutes

Workout Designer: Greg Henderson. Over the years Greg earned a fair amount of respect due to his longevity as a professional athlete in a pretty unforgiving sport. As a pro cyclist, he won or placed in road and track events in various countries for 20 years. He had 13 pro wins, 11 grand tours and 8 classics to his credit. Even after suffering a bad knee injury in a crash during the Tour de France in 2014, he didn’t let it keep him down for long. He’s ridden for Health Net, T-Mobile, Team Columbia, Sky Procycling, Lotto Belisol and he spent his final season representing UnitedHealthcare. Teammates he raced with most often were Andre Greipel, Marcel Sieberg and Adam Hansen.


We highly recommend doing one of the FTP tests as the estimated FTP can be inaccurate and make the difficulty level of the workouts too high for your current fitness level.

For more info on FTP go to: a new window-