Something unusual happens to the space time continuum during Zwift workouts – it tends to slow down or speed up according to the intensity of the effort. I once did a two-minute Vo2 max interval that took at least an hour to complete, and don’t ask about my last 2x20min threshold session, I must’ve been in the shed for several days. On the contrary, recovery periods get the fast-forward treatment - five minutes of breathing space becomes a fleeting few seconds before it’s back to the coalface for another purgatorial high-end battering.
Yes, Zwift workouts - at least at threshold and beyond - are a test of both mental and physical fortitude. But which session, pre-programmed onto the indoor training app, is the toughest? We took on the three which have garnered the most misery with a view to settling the podium placings once and for all.
