期刊
INTERNATIONAL JOURNAL OF SPORTS MEDICINE
卷 36, 期 11, 页码 915-921出版社
GEORG THIEME VERLAG KG
DOI: 10.1055/s-0035-1549854
关键词
heart rate variability; exercise training; individual training adaptation
资金
- Academy of Finland
- University of Turku
- Turku University Hospital
- Abo Akademi University
- Ministry of Education of the State of Finland
- Academy of Finland [251399, 256470]
- Centre of Excellence funding
- European Foundation for the Study of Diabetes
- Hospital District of Southwest Finland
- Orion Foundation
- Finnish Diabetes Foundation
- Finnish Cultural Foundation
- Paavo Nurmi Foundation
- Novo Nordisk Foundation
- Finnish Technology Development Centre (Tekes, Helsinki, Finland)
- Finnish Foundation for Cardiovascular Research (Helsinki, Finland)
- Novo Nordisk Fonden [NNF13OC0004987] Funding Source: researchfish
- Academy of Finland (AKA) [251399, 256470, 256470, 251399] Funding Source: Academy of Finland (AKA)
We tested the hypothesis that baseline cardiac autonomic function and its acute response to all-out interval exercise explains individual fitness responses to high-intensity interval training (HIT). Healthy middle-aged sedentary men performed HIT (n=12, 4-6x30s of all-out cycling efforts with 4-min recovery) or aerobic training (AET, n=9, 40-60min at 60% of peak workload in exercise test [Load(peak)]), comprising 6 sessions within 2 weeks. Low (LF) and high frequency (HF) power of R-R interval oscillation were analyzed from data recorded at supine and standing position (5+5min) every morning during the intervention. A significant training effect (p<0.001), without a training*group interaction, was observed in Load(peak) and peak oxygen consumption (VO2peak). Pre-training supine LF/HF ratio, an estimate of sympathovagal balance, correlated with training outcome in Load(peak) (Spearman's rho [r(s)]=-0.74, p=0.006) and VO2peak (r(s)=-0.59, p=0.042) in the HIT but not the AET group. Also, the mean change in the standing LF/HF ratio in the morning after an acute HIT exercise during the 1(st) week of intervention correlated with training response in Load(peak) (r(s)=-0.68, p=0.014) and VO2peak (r(s)=-0.60, p=0.039) with HIT but not with AET. In conclusion, pre-training cardiac sympathovagal balance and its initial alterations in response to acute HIT exercise were related to fitness responses to short-term HIT.
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