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Effect of a stretching program on the autonomic modulation in hemodialysis patients: pilot study
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Autores
Soler, Alejandro
Abaunza, Catalina
Zapata, Marcela
Povea, Camilo
Fecha
2009-05
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American College of Sports Medicine
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Abstract
PURPOSE: To determine the effect of a stretching program over the autonomic modulation in chronic renal patients on hemodialysis. METHODS: An intradialysis exploratory descriptive pilot study was performed executing stretching exercises for one month every other day. The sample consisted of 3 men (53+/-13,2 yrs) and 4 women (26+/-5,7 yrs) who signed an informed consent. They were evaluated by means of a heart rate variability registry, a challenge of the autonomic nervous system, and stretching tests. The registry was divided into three phases with a 21 minute duration: an initial one in supine position, an orthostatic challenge, and a final one in supine position again. At the end of the month, the patients were re-evaluated. RESULTS: The standard deviation of the RR intervals showed the same tendency but in an opposite direction in women (29,9 +/-11,1 ms before vs 23,7 +/-12,6 ms after), with respect to men (15,3 +/-6,0 ms before vs 22,5 +/-5,0 ms after). The same result occurred with the total spectral power in women (2764,8 +/-1108,5 ms2/Hz before vs 1574,2 +/-1123,8 ms2/Hz after) with respect to men (1162 +/-437,4 ms2/Hz before vs 1646 +/-220,2 ms2/Hz after). The 30:15 index, which was abnormal in all at the beginning of the intervention (0,9+/-0,03), showed an increment in all patients and was normalized in one young female (1,05). The net differences of the high frequency index (-5,9+/-7,9 ms2/Hz before vs 3,9+/-8,9 ms2/Hz after) in the entire sample could indicate some degree of neurovegetative modification. CONCLUSION: This study concludes the existence of an autonomic dysfunction in chronic renal patients confirmed by the differences in the 30:15 index, and the tendency towards a modification in parasympathetic reactivity by means of a stretching program.
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Human Movement and Sports Science , Medical and Health Sciences , Medical Physiology , Public Health and Health Services
