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Influence of home-based telemonitored Nordic walking training on autonomic nervous system balance in heart failure patients.

Piotrowicz E, Buchner T, Piotrowski W, Piotrowicz R - Arch Med Sci (2015)

Bottom Line: Favourable results in CG were not observed.An inverse correlation was found between the decrease in ΔLF/HF and the increase in Δpeak VO2 (R = -0.3830, p = 0.0211) only in the TG.No significant influence of NW on HRT was observed.

View Article: PubMed Central - PubMed

Affiliation: Telecardiology Centre, Institute of Cardiology, Warsaw, Poland.

ABSTRACT

Introduction: Rehabilitation positively affects the modulation of the autonomic nervous system (ANS). There are no papers evaluating the influence of Nordic walking training (NW) on ANS activity among chronic heart failure (CHF) patients. The aim of study was to assess the influence of NW on ANS activity measured by heart rate variability (HRV) and heart rate turbulence (HRT) in CHF patients and its correlation with physical capacity improvement measured by peak oxygen consumption (peak VO2 [ml/kg/min]) in the cardiopulmonary exercise treadmill test (CPET).

Material and methods: The study group comprised 111 CHF patients (NYHA class II-III; ejection fraction (EF) ≤ 40%). Patients were randomized (2 : 1) to 8-week NW (five times weekly) at 40-70% of maximal heart rate (training group - TG) (n = 77), or to a control group (CG) (n = 34). The effectiveness of NW was assessed by changes (delta (Δ)) in peak VO2, HRV and HRT as a result of comparing these parameters from the beginning and the end of the programme.

Results: Eventually, 36 TG patients and 15 CG patients were eligible for HRV and HRT analysis. In the TG low/high frequency ratio (LF/HF) decreased (1.9 ±1.11 vs. 1.7 ±0.63, p = 0.0001) and peak VO2 increased (16.98 ±4.02 vs. 19.70 ±4.36 ml/kg/min, p < 0.0001). Favourable results in CG were not observed. The differences between TG and CG were significant: Δpeak VO2 (p = 0.0081); ΔLF/HF (p = 0.0038). An inverse correlation was found between the decrease in ΔLF/HF and the increase in Δpeak VO2 (R = -0.3830, p = 0.0211) only in the TG. Heart rate variability did not change significantly in either group.

Conclusions: Nordic walking positively affects the parasympathetic-sympathetic balance in CHF patients, which correlates with the improvement in Δpeak VO2. No significant influence of NW on HRT was observed.

No MeSH data available.


Related in: MedlinePlus

Correlation between the change in peak oxygen consumption (Δpeak VO2) and the change in low-to-high frequency ratio (ΔLF/HF) in training group
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Figure 0002: Correlation between the change in peak oxygen consumption (Δpeak VO2) and the change in low-to-high frequency ratio (ΔLF/HF) in training group

Mentions: Additionally, an inverse correlation was found between the decrease in ΔLF/HF and the increase in Δpeak VO2 (R = –0.3830, p = 0.0211) only in the TG (Figure 2). There was no correlation observed between these parameters in the CG (R = –0.2163, p = 0.4387) (Figure 3).


Influence of home-based telemonitored Nordic walking training on autonomic nervous system balance in heart failure patients.

Piotrowicz E, Buchner T, Piotrowski W, Piotrowicz R - Arch Med Sci (2015)

Correlation between the change in peak oxygen consumption (Δpeak VO2) and the change in low-to-high frequency ratio (ΔLF/HF) in training group
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4697054&req=5

Figure 0002: Correlation between the change in peak oxygen consumption (Δpeak VO2) and the change in low-to-high frequency ratio (ΔLF/HF) in training group
Mentions: Additionally, an inverse correlation was found between the decrease in ΔLF/HF and the increase in Δpeak VO2 (R = –0.3830, p = 0.0211) only in the TG (Figure 2). There was no correlation observed between these parameters in the CG (R = –0.2163, p = 0.4387) (Figure 3).

Bottom Line: Favourable results in CG were not observed.An inverse correlation was found between the decrease in ΔLF/HF and the increase in Δpeak VO2 (R = -0.3830, p = 0.0211) only in the TG.No significant influence of NW on HRT was observed.

View Article: PubMed Central - PubMed

Affiliation: Telecardiology Centre, Institute of Cardiology, Warsaw, Poland.

ABSTRACT

Introduction: Rehabilitation positively affects the modulation of the autonomic nervous system (ANS). There are no papers evaluating the influence of Nordic walking training (NW) on ANS activity among chronic heart failure (CHF) patients. The aim of study was to assess the influence of NW on ANS activity measured by heart rate variability (HRV) and heart rate turbulence (HRT) in CHF patients and its correlation with physical capacity improvement measured by peak oxygen consumption (peak VO2 [ml/kg/min]) in the cardiopulmonary exercise treadmill test (CPET).

Material and methods: The study group comprised 111 CHF patients (NYHA class II-III; ejection fraction (EF) ≤ 40%). Patients were randomized (2 : 1) to 8-week NW (five times weekly) at 40-70% of maximal heart rate (training group - TG) (n = 77), or to a control group (CG) (n = 34). The effectiveness of NW was assessed by changes (delta (Δ)) in peak VO2, HRV and HRT as a result of comparing these parameters from the beginning and the end of the programme.

Results: Eventually, 36 TG patients and 15 CG patients were eligible for HRV and HRT analysis. In the TG low/high frequency ratio (LF/HF) decreased (1.9 ±1.11 vs. 1.7 ±0.63, p = 0.0001) and peak VO2 increased (16.98 ±4.02 vs. 19.70 ±4.36 ml/kg/min, p < 0.0001). Favourable results in CG were not observed. The differences between TG and CG were significant: Δpeak VO2 (p = 0.0081); ΔLF/HF (p = 0.0038). An inverse correlation was found between the decrease in ΔLF/HF and the increase in Δpeak VO2 (R = -0.3830, p = 0.0211) only in the TG. Heart rate variability did not change significantly in either group.

Conclusions: Nordic walking positively affects the parasympathetic-sympathetic balance in CHF patients, which correlates with the improvement in Δpeak VO2. No significant influence of NW on HRT was observed.

No MeSH data available.


Related in: MedlinePlus