Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
Unger, A.
Exercise and sleep in female pupils: effects between two types of exercise interventions on autonomic sleep quality by heart rate variability.
[ Dissertation ] Medical University of Graz; 2013. pp.148.
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- Autor*innen der Med Uni Graz:
- Betreuer*innen:
- Moser Maximilian
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- Abstract:
- Background: Chronobiology, with its circadian rhythmicity, plays an important role in sleep regulation (Moser et al. 2006; Moser et al. 2008). Sleep is a complex and physiological highly active state characterized by neuronal activation and autonomic modulation. The heart rate influenced by sympathetic and parasympathetic outflow is an important cardiovascular parameter that becomes quantifiable as heart rate variability (HRV) is measured over time. The measurement of HRV-indices during sleep is a non-invasive method for getting information about the autonomic regulation with its nocturne recovery. As there is a relation between autonomic sleep recovery and health, it would be important to know how to optimize this coherence. Purpose: The aim of this study was to examine the impact between two types of intervention (vigorous-intensity endurance training vs. coordination) on the autonomic sleep recovery in female pupils by HRV and to analyse possibly different influences on the autonomic modulation. Study Design: 31 healthy female pupils from the private school Sacrè Coeur, Graz aged between 14 and 16 years were included in the study, 26 pupils were chosen for analysis. The intervention study lasted eight weeks and was split up into PRE (2 weeks), INTERVENTION (4 weeks) and POST (2 weeks) periods. Questionnaires as measure diaries were collected once a week, 25-hour HRV measurements were conducted 5 times after a test measurement: 1x in the PRE (w2), 2x in the INTERVENTION (w3;w5), and 2x in the POST (w7; w8) period. The shuttle run was conducted during w2 and w7 to compare the fitness of the pupils before and after the intervention. During the INTERVENTION period, the pupils took part in a 30-minute jogging or coordination training 3 times a week. The jogging training was simultaneously carried out with the coordinative training (aerobic) with vigorous intensity. Results: Both groups increased their level of fitness, measured by the shuttle run (p=.001), although a significant decrease of the HR during the day (p=.040) and during sleep (p=.045) could only be observed in the jogging group. The ratio between LF and HF, seen in the VQ, revealed a significant interaction (p=.042), pointing out the different compensation of both groups. The coordinative training led to a decrease in VQ values, indicating a high potential of relaxation during sleep after the training had begun. Less nocturne recovery was achieved by the jogging group showing a high level of activation in the first week of training. This divergent development agrees with values of LF (interaction: p= .049) that showed the highest level in the jogging group during the first week of intervention, indicating restless sleep. Conclusion: This study showed that both interventions with the same intensity and duration influenced the autonomic modulation during sleep in a different way. The coordinative group showed a higher autonomic recovery during sleep than the jogging group.