Welcome to VO2sday - 5 short, back-to-back TT races designed to give you a properly structured VO2 Max workout in a motivating and engaging race!

RESULTS: Final race results combining all 5 events can be found at https://leadoutesports.com/vo2sday/Opens a new window.

IMPORTANT: You need to create an account at Leadout and link it to your Zwift account to show up in race results.

All races are 4 minutes long. Whoever rides the furthest, wins! Be sure to complete all 5 races so you get a full workout and are included in the overall competition.

Because the goal is for you to hold your max power for the duration of each race, these are set up as mass-start time trial events. Drafting is disabled, so there's no 'sitting in.' Use the best TT frame and wheels you've got. Push as hard as you can for the race duration, then recover and do it again!

Categories are based on your compound score, which takes into account your 5-minute power and body weight, computed as (5-min power in W/kg) * (5-min power in W). Current category setup:

- A: 1600+
- B: 1200-1600
- C: 900-1200
- D: 900 and below