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Neuromuscular adjustments following sprint training with ischemic preconditioning in endurance athletes: preliminary data

Bouffard Stephan, Paradis-Deschênes Pénélope et Billaut François. (2021). Neuromuscular adjustments following sprint training with ischemic preconditioning in endurance athletes: preliminary data. Sports, 9, (9), p. 124.

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URL officielle: http://dx.doi.org/doi:10.3390/sports9090124

Résumé

This preliminary study examined the effect of chronic ischemic preconditioning (IPC) on neuromuscular responses to high-intensity exercise. In a parallel-group design, twelve endurance-trained males (VO2max 60.0 ± 9.1 mL·kg−1·min−1) performed a 30-s Wingate test before, during, and after 4 weeks of sprint-interval training. Training consisted of bi-weekly sessions of 4 to 7 supra-maximal all-out 30-s cycling bouts with 4.5 min of recovery, preceded by either IPC (3 × 5-min of compression at 220 mmHg/5-min reperfusion, IPC, n = 6) or placebo compressions (20 mmHg, PLA, n = 6). Mechanical indices and the root mean square and mean power frequency of the electromyographic signal from three lower-limb muscles were continuously measured during the Wingate tests. Data were averaged over six 5-s intervals and analyzed with Cohen’s effect sizes. Changes in peak power output were not different between groups. However, from mid- to post-training, IPC improved power output more than PLA in the 20 to 25-s interval (7.6 ± 10.0%, ES 0.51) and the 25 to 30-s interval (8.8 ± 11.2%, ES 0.58), as well as the fatigue index (10.0 ± 2.3%, ES 0.46). Concomitantly to this performance difference, IPC attenuated the decline in frequency spectrum throughout the Wingate (mean difference: 14.8%, ES range: 0.88–1.80). There was no difference in root mean square amplitude between groups. These preliminary results suggest that using IPC before sprint training may enhance performance during a 30-s Wingate test, and such gains occurred in the last 2 weeks of the intervention. This improvement may be due, in part, to neuromuscular adjustments induced by the chronic use of IPC.

Type de document:Article publié dans une revue avec comité d'évaluation
Volume:9
Numéro:9
Pages:p. 124
Version évaluée par les pairs:Oui
Date:2021
Sujets:Sciences de la santé
Sciences de la santé > Sciences de l'activité physique et réadaptation
Sciences de la santé > Sciences de l'activité physique et réadaptation > Kinésiologie
Département, module, service et unité de recherche:Départements et modules > Département des sciences de la santé > Programmes d'études en kinésiologie
Mots-clés:Chronic ischemic preconditioning, blood-flow restriction, HIIT, hypoxia, NIRS, peripheral adaptation, restriction du flux sanguin, hypoxie, adaptation périphérique, préconditionnement ischémique chronique
Déposé le:07 févr. 2022 21:14
Dernière modification:07 févr. 2022 21:14
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