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Longer skis can run faster on firm snow at speed, but shorter skis often win in tight turns, bumps, and mixed terrain.

Yes, kneeskins can make you faster by trimming drag and steadying body position, though the gain is usually small and fit-dependent.

Yes, football boots can help you run faster on pitch by boosting grip and push-off, but only when the fit and stud choice match the surface.

Jump lunges can build leg power and snap, but real speed gains come when you pair them with sprinting, strength work, and clean landings.

Yes, humans have fast-twitch muscle fibers, and they help you move with speed and force for short bursts.

Fast-twitch muscle fibers aren’t smaller by default; in many muscles, type II fibers run larger, with overlap across types.

No, most liver function tests don’t require fasting, but you may be asked to fast 8–12 hours when other blood tests are included.

Most endoscopies need an empty stomach: stop solids 6 to 8 hours before and stop clear liquids 2 hours before.

No, most GFR blood test results don’t require fasting, but you may need to fast if the same order includes glucose or lipids.

No, fast-twitch muscles can bounce back fast after short bursts, but they can take longer after heavy, high-volume lifting.