The dead spot in your pedal stroke is costing you more than watts

Worth separating the two, because riders assume time on any bike trains the same thing. It doesn't.

Mountain biking is intermittent and postural. You're out of the saddle constantly, absorbing terrain, braking, cornering, changing position. The demand is broad and unpredictable, and it loads the hip through a wide range whether you plan it or not — which is a different set of problems, covered in the mountain biking article.

Road riding is the opposite. Seated, one position, cadence held in a narrow band, the same arc of hip motion repeated for hours. That repetition is what makes road riders efficient — and it is exactly what makes a weak section of the stroke so expensive. On a mountain bike a dead spot gets covered by the next thing that happens. On the road there is no next thing. There's just the same rotation, thousands more times.

Driving through the bottom of the circle is glute, hamstring and calf firing in sequence, with the trunk stable enough to give them something to push against. Road cycling on its own builds almost none of it. The hip range is small, the load is light and continuous rather than heavy and intermittent, and the posterior chain is never once asked to work at length. Riders end up strong in a narrow band and weak either side of it — fine until the gradient changes or the ride goes long.

Single-leg hip hinge. Split stance, most of the weight on the front foot, weight held in the opposite hand. Hinge from the hip — not the low back — until the hamstring loads, then drive the floor away. The opposite-hand load is deliberate: it forces the trunk to resist rotation, which is what it has to do when you're out of the saddle on a climb.

Slow, heavy, few reps. Six to eight controlled reps beats twenty rushed ones. You're recruiting muscle that has been quiet, not building endurance you already have in abundance. Pair it with the glute work that underpins most back and knee stories.

The tell. Get off the bike and stand on one leg. Hinge forward, reaching toward the floor, back leg staying in line with your spine. If your low back rounds before your hip has moved far, or you can't do it at all on one side, you've found the reason the bottom of your stroke is empty.