Research helps explain five common running roadblocks. Here’s how to run faster.
Train your fast-twitch fibers to be more efficientoften feel pretty easy. You’re not sprinting fast enough to accumulate high levels of lactate and other metabolites; and unlike in a marathon, you’re not running far enough to empty fuel stores. So why does it eventually—and inevitably—get hard?from the University of Copenhagen, once again depends on oxygen kinetics.
This drift is the result of a shift to less-efficient muscle fibers. When you start running, you automatically recruit mostly slow-twitch muscle fibers, which are suited for long-distance running because they’re efficient and take a long time to fatigue. As time goes on, though, individual fibers begin to fatigue and run low on fuel. To replace them, your brain recruits fast-twitch fibers, which demand more energy—and oxygen—to deliver the same output.
For decades, scientists and athletes have talked about “lactic acid burn” triggered by intense exercise. When you run hard, you eventually reach a point where your aerobic energy system—the ultra-efficient fuel supply that relies on oxygen delivered by your heart and lungs—can’t supply energy to your muscles quickly enough. You turn instead to anaerobic energy sources, which provide much-needed fuel but also generate metabolites that build up in your muscles.
The results were dramatic. When the first subject finished and tried to step off the bike, he nearly collapsed on the floor before Amann and his researchers caught him. All subsequent subjects had to be helped off the bike. Some couldn’t unclip their feet from the pedals, Amann recalls, “and not a single one was able to walk.
Yet despite their temporary superhuman status, the subjects didn’t ride faster than when they received a placebo injection. “They always feel great initially,” says Gregory Blain, Ph.D., one of Amann’s colleagues. “They’re flying. But”—he flashes a wicked grin—”we know they’re going to crash.” By the halfway mark, the cyclists still felt great, but they started to look puzzled, because their legs were no longer responding to the commands sent by their brains.
México Últimas Noticias, México Titulares
Similar News:También puedes leer noticias similares a ésta que hemos recopilado de otras fuentes de noticias.
Alberto Fernández, Argentina’s new president, faces economic crisisMauricio Macri was the first non-Peronist since 1983 to end his term in office without tumult on the streets
Leer más »
Juice WRLD's Friends Say He Was Racially Profiled by CopsJuice WRLD had a history of airport drug busts.
Leer más »
Film News Roundup: Concert-Documentary ‘The Doors: Break on Thru’ Set for FebruaryIn today’s film news roundup, one-night showings of a Ray Manzarek tribute and the season premiere of “Doctor Who” have been set for 2020, and the MPAA hires a copyright expert. O…
Leer más »
Each of the New Vogue Covers Is a Historic FirstCardi B, Ashley Graham, Stella McCartney, and Greta Gerwig all have something in common
Leer más »
Your Skin Is About To Have Its Best Winter Yet — Thanks To These Influencer TipsYour skin is about to have its best winter yet — thanks to these influencer tips: R29xHeritageStore ad
Leer más »
Opinion | Michelle Obama Is Racially Insensitive?From wsjopinion: Underdeveloped human capital, not white racism, is the biggest barrier to African-American advancement today, writes jasonrileywsj
Leer más »