Ischemic preconditioning delays the time of exhaustion in cycling performance during the early but not in the late phase
Motriz (Online)
; 25(1): e101821, 2019. tab, ilus
Article
in English
| LILACS
| ID: biblio-1012691
Responsible library:
BR1.1
ABSTRACT
Aims:
To investigate the early and late ischemic preconditioning (IPC) effect on the trained cyclists' performance during incremental cycling test until exhaustion.Methods:
Twenty-one male cyclists allocated to an IPC (2 x 5-min of blood flow occlusion at 50 mm Hg above systolic pressure followed + 5-min of deflation), SHAM (2 x 5-min at 20 mm Hg) or control (CON; no occlusion) interventions, performed three incremental cycling test (ICT) until exhaustion on separate days. The ICT were conducted pre interventions (baseline), 5-min and 24-h after interventions. The heart rate (HR) and power output (PO) were recorded during all ICT.Results:
The IPC group increased ICT performance (4.4 ± 4.0 %; effect size (ES) = 0.27) 5-min post intervention, accompanied by HR mean reduction, compared to baseline (p < 0.05). However, there were no changes in SHAM (2.2 ± 4.2%; ES = 0.07) and CON (2.9 ± 5.0%; ES = 0.06) groups. In 24-h post intervention, SHAM (0.2 ± 4.7%; ES = 0.02) and CON (-1.0 ±1.6; ES = 0.03) maintained (p > 0.05) and IPC group decreased the performance (-4.6 ± 3.6 %; ES = 0.16) compared to 5-min post intervention (p < 0.05), but all groups were similar to baseline (p > 0.05). There were no difference (p > 0.05) among groups for PO peak, HR and ICT performance in all moments (baseline, 5-min and 24-h post intervention).Conclusion:
The IPC increases early but not late incremental cycling test performance.(AU)
Full text:
Available
Collection:
International databases
Database:
LILACS
Main subject:
Bicycling
/
Athletic Performance
/
Heart Rate
/
Ischemia
Limits:
Humans
/
Male
Language:
English
Journal:
Motriz (Online)
Journal subject:
EducaÆo F¡sica e Treinamento
/
Medicina Esportiva
/
Medicina F¡sica e ReabilitaÆo
Year:
2019
Document type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Centro Universitário de Belo Horizonte/BR
/
Universidade Federal de Juiz de Fora - UFJF/BR