I suppose I was aiming to kill 2 birds with one stone - get faster (though SS intervals) and lose weight/improve metabolism (by doing a fasted workout) in a single session.
You might be doing both but you won't necessarily be as fast because you won't be getting the best workouts done. They're conflicting goals. Fast during the easier rides.
Also when are you planning on doing all these? 2x ss and VO2 and not fueling properly? You'll last a month.
I suppose I was aiming to kill 2 birds with one stone - get faster (though SS intervals) and lose weight/improve metabolism (by doing a fasted workout) in a single session.
is that unfeasible?