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Aika erikoista katsottavaa on useimpien huippumiesten harjoittelu. Ja tarkoitan tällä monen muunkin esille tuomaa hutiloivaa (painoja heilutellaan miten kuten eikä esim. vastusteta negatiivista osuutta lainkaan) ja todella paljon puolikkaita tai ainakin osittain vajaita toistoja sisältävää harjoitustekniikkaa. Lihaksethan ovat miehillä valtavat, joten ei heidän treeneistään sen enempää, perille näyttää menevän. Ehkä he ovat joskus aikaisemmin tehneet liikkeitä täysilläkin liikeradoilla, tai sitten oma käsitykseni (ja useimpien muiden tuntemieni harjoittelusta kirjoittavien/kirjoittaneiden käsitys) tuloksellisesta ja sanotaan nyt ainakin järkevästä harjoitusliikkeiden suoritustavasta on kerta kaikkiaan virheellinen/vanhanaikainen.
Particularly relevant to muscle building is the fact that each muscle fiber has a ideal length at which it generates maximum force when contracting. The force generated is directly influenced by the amount of elogation (contraction or extension) that the fiber is under at the start of the contraction.
Going back to the sliding filament theory, this optimum length is the point at which the actin and myosin filaments line up in such a way that allows maximum cross-bridge formation. When the muscle is extended more than this the actin filaments cannot make contact with as many myosin cross-bridges - they have slid past each other, so to speak.
When the muscle is contracted to a shorter length than optimal, less force can be developed for a few reasons.
For one, the normal chemical processes taking place within the fiber become altered so that fewer actin cross-bridge attachment sites are uncovered and available for cross-bridging (the reason this happens is unknown at present). In addition, filaments from the opposite ends of the sacromere overlap and cover some actin cross-bridge attachment sites, further reducing the number of possible cross-bridges. Still further, the myosin filaments come up against the ends of each individual sacromere (what's referred to as the z-lines), impeding any further shortening.
and
So what is a muscle's optimum length for generating force? Well, generally, it is the length of the muscle while in its relaxed state. How much strength is lost when the muscle contracts at some other length than optimum? Well, at the extreme points of a muscle's extension or contraction (extended ~30% longer and contracted ~30% shorter than optimal) a muscle has the ability to contract only ~50% as forcefully as it can at the optimal length.
This clearly shows that all 'peak contractions' are necessarily 'weak' by the physiological factors governing them, and this limits their potential for producing muscular growth. These exercises have no place in a strength/size program; they are especially inappropriate for the drug-free, genetically abverage weight trainer; save your energy for where it's needed - getting stronger.
Muijasta :D
Parasta videossa lopussa olevan venyttelytytön pershe!!:whip: