How many grams of carbohydrate you take in per hour. Over middle and long distance 60–90 g is the target — from a single sugar source only about 60 g is usable.
Stepping off and back on while moving at an obstacle. The movement is identical at any speed — so drill it slowly until it's automatic, and only then add pace.
Holding your output steady across the whole course profile instead of pushing on climbs. In Ironman World Championship data, low heart-rate variation was the strongest marker of success.
The sprocket is bolted solid to the hub: no freewheel, no brakes. You slow down purely by pushing back against the pedals — on the track that's the rulebook, not a style choice.
A tyre system with no inner tube: sealant closes small holes from the inside. It lets you run less pressure without pinch flats — on a road bike about 0.5 bar below your tubed value.
BMR is your basal metabolic rate at complete rest; TDEE is total daily expenditure including everyday movement and training. Nutrition targets always work off TDEE.