dc.contributor.author | Sundnes, Joakim | |
dc.date.accessioned | 2016-10-10T07:06:27Z | |
dc.date.available | 2016-10-10T07:06:27Z | |
dc.date.issued | 2016 | |
dc.identifier.uri | http://hdl.handle.net/11250/2413738 | |
dc.description | Masteroppgave i idrettsvitenskap - Universitetet i Agder 2016 | nb_NO |
dc.description.abstract | Introduction: Blood flow restricted resistance exercise (BFRRE) can induce rapid increases
in muscle size, strength and swelling. No previous research has investigated the importance of
conducting BFRRE to voluntary failure and few studies has been carried out to investigate
associations between swelling and muscle size. Therefore, the aim of the present study was
twofold (1) compare changes in muscle size and strength between a failure (FA) and
submaximal (SU) BFRRE protocol (2) investigate associations between swelling and muscle
size.
Methods: Seventeen untrained men had their legs randomized to FA and SU protocols. The
intervention consisted of two training periods including seven BFRRE sessions within five
days (separated with 10 days’ rest) using unilateral knee extension at 20% of one repetition
maximum (1RM) (30 s rest between sets). Swelling and muscle size was measured with
ultrasound, whereas strength was measured as 1RM and maximal voluntary contraction
(MVC).
Results: Cross-sectional area (CSA) of rectus femoris increased significantly in both groups
compared to baseline (FA: 7.9 ± 7.6%; p < 0.001 and SU: 9.1 ± 10.8%; p = 0.003), where no
differences in muscle size were observed between groups. Strength (1RM) increased
significantly in both groups (FA: 9±8%; p < 0.001 and SU: 11±7%; p < 0.001) at 24 days’
post intervention, whereas no group differences were found. Swelling increased CSA of
rectus femoris (12.0±9.72%, p<0.001) compared to ultrasound measurement obtained right
before BFRRE.
Conclusion: FA and SU induced similar gains in muscle size and strength. Acute swelling
increased, whereas no associations was observed between swelling and muscle size
Keywords: ultrasound, blood flow restriction resistance exercise, concentric failure,
submaximal, muscle thickness, cross-sectional area, swelling | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | Universitetet i Agder ; University of Agder | nb_NO |
dc.subject | ultrasound | nb_NO |
dc.subject | blood flow restriction resistance exercise | nb_NO |
dc.subject | concentric failure | nb_NO |
dc.subject | submaximal | nb_NO |
dc.subject | muscle thickness | nb_NO |
dc.subject | cross-sectional area | nb_NO |
dc.subject | swelling | nb_NO |
dc.subject | ultralyd | nb_NO |
dc.subject | styrketrening med redusert blodstrøm | nb_NO |
dc.subject | utmattelse | nb_NO |
dc.subject | submaksimal | nb_NO |
dc.subject | muskeltykkelse | nb_NO |
dc.subject | tverrsnitts-areal | nb_NO |
dc.subject | svelling | nb_NO |
dc.subject.classification | ME517 | |
dc.title | The effect of a failure and submaximal blood flow restriction resistance exercise protocol on changes in muscle size, strength and swelling | nb_NO |
dc.type | Master thesis | nb_NO |
dc.subject.nsi | VDP::Social science: 200::Social science in sports: 330::Physical education and sport psychology: 333 | nb_NO |
dc.source.pagenumber | [88] s. | nb_NO |