WHY THIS HAPPENS
Power-to-weight ratio (W/kg) is the single biggest climbing determinant — both sides matter
Pacing mistakes: going too hard early blows your top-end before the summit
Threshold and VO2max capacity below where it needs to be
Insufficient sustained high-intensity work (3-8 min efforts)
Excess body mass that isn't muscle
Mental framing: climbs feel harder because they expose the gap between your fitness and your ambition