A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Acute neuromuscular and hormonal responses to 20 versus 40% velocity loss in males and females before and after 8 weeks of velocity-loss resistance training (2022)

Walker, S., Häkkinen, K., Virtanen, R., Mane, S., Bachero‐Mena, B., & Pareja‐Blanco, F. (2022). Acute neuromuscular and hormonal responses to 20 versus 40% velocity loss in males and females before and after 8 weeks of velocity-loss resistance training. Experimental Physiology, 107(9), 1046-1060. https://doi.org/10.1113/EP090371

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Walker, Simon; Häkkinen, Keijo; Virtanen, Roosa; Mane, Shashank; Bachero‐Mena, Beatriz; Pareja‐Blanco, Fernando

Lehti tai sarja: Experimental Physiology

ISSN: 0958-0670

eISSN: 1469-445X

Julkaisuvuosi: 2022

Ilmestymispäivä: 05.08.2022

Volyymi: 107

Lehden numero: 9

Artikkelin sivunumerot: 1046-1060

Kustantaja: Wiley

Julkaisumaa: Britannia

Julkaisun kieli: englanti

DOI: https://doi.org/10.1113/EP090371

Linkki tutkimusaineistoon: https://doi.org/10.5281/zenodo.6801210

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/82933

Tiivistelmä

Scientific examination of velocity-based resistance training (VBRT) has increased recently, but how males and females respond to different VBRT protocols or how these acute responses are modified after a period of training is unknown. Habitually resistance-trained males and females followed either a 20% or 40% velocity-loss program for 8 weeks. Acute squat loading tests (5 sets, 70% 1-RM load, 3 minutes rest) were performed before and after the training period. Tests of maximum neuromuscular performance and blood sampling were conducted prior to, within 10 minutes of completion (POST) and 24 hours after each acute loading test. Testing included countermovement jump, resting femoral nerve electrical stimulation, and bilateral isometric leg press. Blood samples were analysed for whole-blood lactate, serum testosterone, cortisol, growth hormone and creatine kinase concentrations. Countermovement jump height, maximum isometric bilateral leg press force, and force from 10 Hz doublet decreased in all groups at POST after 20% and 40% velocity-loss. Only males showed reduced force from 100 Hz doublet and voluntary force over 100 ms at POST before training. 40% velocity-loss led to increased blood lactate and growth hormone responses before training in both males and females. After training, more systematic and equivalent responses in force over 100 ms, force from 100 Hz doublet and blood lactate were observed regardless of sex/VBRT protocol. Overall, acute responses were greater from 40% VBRT and males were more susceptible to acute loss in force production capacity before the training period. These VBRT protocol- and sex-related differences were diminished after training.

YSO-asiasanat: voimaharjoittelu; sukupuoli; naiset; miehet; suorituskyky; lihasvoima; nopeus; väsymys; hormonit; hermo-lihastoiminta

Vapaat asiasanat: strength; power; sex; fatigue; electrical stimulation; low frequency

Liittyvät organisaatiot

OKM-raportointi: Kyllä

Raportointivuosi: 2022

JUFO-taso: 1