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Strength training elevates HSP27, HSP70 and alpha B-crystallin levels in musculi vastus lateralis and trapezius
Norwegian School of Sport Sciences, Oslo, Norway .
Norwegian School of Sport Sciences, Oslo, Norway; Ostfold University College, Halden, Norway.
Norwegian School of Sport Sciences, Oslo, Norway;Lillehammer University College, Lillehammer, Norway.
Norwegian School of Sport Sciences, Oslo, Norway.
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2012 (English)In: European Journal of Applied Physiology, ISSN 1439-6319, E-ISSN 1439-6327, Vol. 112, no 5, p. 1773-1782Article in journal (Refereed) Published
Abstract [en]

A single bout of high-force exercise has been shown to increase the muscle levels of heat shock proteins (HSPs). Here, changes in the levels of HSPs after 2 and 11 weeks of strength training with either one or three sets per exercise were examined. Fifteen young men (27 +/- A 6 years, 182 +/- A 8 cm and 82 +/- A 13 kg) were randomized to train either one set in lower-body exercises and three sets in upper-body exercises (1L-3UB), or three sets in lower-body exercises and one set in upper-body exercises (3L-1UB). Biopsies from vastus lateralis and trapezius were obtained before, during (2 weeks) and after 11 weeks of strength training (3 bouts per week). The biopsies were analysed for HSP27 (cytosolic and cytoskeletal fractions) and HSP70 and alpha B-crystallin (cytosolic fraction). No evidence for an effect of training volume (1 vs. 3 sets) on the HSP response was found. For all subjects combined, HSP27 [186 +/- A 69% (mean +/- A SD)], HSP70 (146 +/- A 51%) and alpha B-crystallin (184 +/- A 82%) increased in the cytosolic fraction of vastus lateralis after 11 weeks of training. In the trapezius, the only observed increase was for HSP27 in the cytosolic fraction after 2 weeks of training (149 +/- A 59%). However, the trapezius contained somewhat higher levels of HSP70 and alpha B-crystallin than vastus lateralis at baseline. The HSP27 levels in the cytoskeletal compartment did not increase significantly in either muscle. In conclusion, strength training resulted-independent of training volume-in elevated levels of HSP27, HSP70 and alpha B-crystallin in the cytosolic compartment of the vastus lateralis. In the trapezius, only the cytosolic HSP27 levels were increased with training.

Place, publisher, year, edition, pages
Heidelberg, Germany: Springer, 2012. Vol. 112, no 5, p. 1773-1782
Keywords [en]
Stress proteins, Resistance exercise, Hypertrophy, Adaptation to training
National Category
Medical and Health Sciences Sport and Fitness Sciences
Research subject
Sports Science
Identifiers
URN: urn:nbn:se:oru:diva-22824DOI: 10.1007/s00421-011-2132-8ISI: 000302745700021PubMedID: 21901266Scopus ID: 2-s2.0-84861527958OAI: oai:DiVA.org:oru-22824DiVA, id: diva2:526571
Available from: 2012-05-14 Created: 2012-05-14 Last updated: 2019-08-29Bibliographically approved

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Kadi, Fawzi

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