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- Title
Left atrial functional changes following short-term exercise training.
- Authors
Wright, Steve; Esfandiari, Sam; Elmayergi, Nader; Sasson, Zion; Goodman, Jack
- Abstract
Background: Exercise-induced adaptations of the human atria remain understudied, particularly early in the training process. We examined the effects of short-term high-intensity interval training (HIT) and continuous moderate-intensity training (CMT) on left atrial (LA) systolic and diastolic function, relative to left ventricular (LV) function in young, healthy men, by speckle tracking echocardiography (STE). Methods: Fourteen untrained men (mean age = 25 ± 4 years) were randomized to HIT or CMT, and assessed before and after six training sessions over a 12-day period. HIT included 8-12 intervals of cycling for 60 s at 95-100 % of maximal aerobic power (VO), interspersed by 75 s of cycling at 10 % VO. CMT consisted of 90-120 min of cycling at 65 % VO. Results: VO increased following HIT and CMT by 11.5 and 5.5 %, respectively ( p < 0.05). Calculated plasma volume expanded 11 % following HIT and 10 % following CMT ( p < 0.005). Resting LV volumes and ejection fraction were unaltered following training. Peak atrial longitudinal strain increased following HIT (41.8 ± 5.2 %-47.1 ± 3.7 %, p < 0.01) and CMT (38.5 ± 4.6 %-41.7 ± 6.0 %, p < 0.01). Atrial systolic strain rate increased following HIT (1.6 ± 0.2 %/s-2.0 ± 0.3 %/s, p < 0.01) and CMT (1.6 ± 0.2 %/s-1.9 ± 0.2 %/s, p < 0.01). Conclusions: LA function assessed by STE improves rapidly during short-term intensive exercise training.
- Subjects
EXERCISE physiology; INTERVAL training; CARDIAC contraction; DIASTOLE (Cardiac cycle); ECHOCARDIOGRAPHY; AEROBIC capacity
- Publication
European Journal of Applied Physiology, 2014, Vol 114, Issue 12, p2667
- ISSN
1439-6319
- Publication type
Article
- DOI
10.1007/s00421-014-2989-4