Kolozzeum Forum - Sveriges största träningsforum
Gå tillbaka   Kolozzeum Forum - Sveriges största träningsforum > Träning > Träning - Vikter & Kondition

Svara
 
Ämnesverktyg Visningsalternativ
Gammal 2018-10-16, 11:59   #1
King Grub
Chefsarkitekt Oljebyxor
 
King Grubs avatar
 
Reg.datum: Mar 2002
Ort: Norrtälje
Inlägg: 78 268
Tillväxt och styrka av hög och låg belastning, med eller utan strypt blodtillförsel

Citat:
An inability to lift loads great enough to disrupt muscular blood flow may impair the ability to fatigue muscles, compromising the hypertrophic response. It is unknown what level of blood flow restriction (BFR) pressure, if any, is necessary to reach failure at very low-loads [i.e., 15% one-repetition maximum (1RM)]. The purpose of this study was to investigate muscular adaptations following resistance training with a very low-load alone (15/0), with moderate BFR (15/40), or with high BFR (15/80), and compare them to traditional high-load (70/0) resistance training. Using a within/between subject design, healthy young participants (n = 40) performed four sets of unilateral knee extension to failure (up to 90 repetitions/set), twice per week for 8 weeks. Data presented as mean change (95% CI). There was a condition by time interaction for 1RM (p < 0.001), which increased for 70/0 [3.15 (2.04,4.25) kg] only. A condition by time interaction (p = 0.028) revealed greater changes in endurance for 15/80 [6 (4,8) repetitions] compared to 15/0 [4 (2,6) repetitions] and 70/0 [4 (2,5) repetitions]. There was a main effect of time for isometric MVC [change = 10.51 (3.87,17.16) Nm, p = 0.002] and isokinetic MVC at 180°/s [change = 8.61 (5.54,11.68) Nm, p < 0.001], however there was no change in isokinetic MVC at 60°/s [2.45 (−1.84,6.74) Nm, p = 0.261]. Anterior and lateral muscle thickness was assessed at 30, 40, 50, and 60% of the upper leg. There was no condition by time interaction for muscle thickness sites (all p ≥ 0.313). There was a main effect of time for all sites, with increases over time (all p < 0.001). With the exception of the 30% lateral site (p = 0.059) there was also a main effect of condition (all p < 0.001). Generally, 70/0 was greater. Average weekly volume increased for all conditions across the 8 weeks, and was greatest for 70/0 followed by 15/0, 15/40, then 15/80. With the exception of 1RM, changes in strength and muscle size were similar regardless of load or restriction. The workload required to elicit these changes lowered with increased BFR pressure. These findings may be pertinent to rehabilitative settings, future research, and program design.
Muscle Adaptations to High-Load Training and Very Low-Load Training With and Without Blood Flow Restriction. Front. Physiol., 16 October 2018.

https://www.frontiersin.org/articles...018.01448/full
__________________


Angående PM-rådgivning!
King Grub är inte uppkopplad   Svara med citat


Svara

Ämnesverktyg
Visningsalternativ

Regler för att posta
Du får inte posta nya ämnen
Du får inte posta svar
Du får inte posta bifogade filer
Du får inte redigera dina inlägg

BB-kod är
Smilies är
[IMG]-kod är
HTML-kod är av

Forumhopp


Alla tider är GMT +1. Klockan är nu 23:47.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Svensk översättning av: Anders Pettersson
Copyright 2015, Kolozzeum (TM)