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Gammal 2019-02-21, 09:52   #1
King Grub
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Reg.datum: Mar 2002
Ort: Norrtälje
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Effekt av stretching på heart rate variability

Citat:
Stretching (ST), an exercise modality widely used for flexibility improvement, has been recently proposed as an effective adjunct therapy for declines in cardiovascular health, warranting research into the effects of ST exercise on cardiac autonomic function (CAF). Heart rate (HR) variability (HRV) is a reliable measure of CAF, mainly the sympathetic and parasympathetic modulations of HR. A low HRV has been associated to increased risk of cardiovascular events and mortality. Exercise interventions that enhance HRV are therefore seen as beneficial to cardiovascular health and are sought after. In this review, we discuss the effect of ST both acute and training on HRV. Stretching training seems to be a useful therapeutic intervention to improve CAF in different populations. Although the mechanisms by which ST training improves CAF are not yet well understood; increases in baroreflex sensitivity, relaxation, and nitric oxide bioavailability seem to play an important role.
Effects of Acute Stretching Exercise and Training on Heart Rate Variability
A Review. The Journal of Strength & Conditioning Research, February 14, 2019.
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Gammal 2019-02-21, 10:19   #2
Termy
理学療法士
 
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Reg.datum: Aug 2003
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Slänger in en till studie om HRV men utifrån periodisering istället:

https://docdro.id/kmJLBxS
J Strength Cond Res. 2019 Feb 6. doi: 10.1519/JSC.0000000000003013. [Epub ahead of print] Effects of Different Periodization Strategies of Combined Aerobic and Strength Training on Heart Rate Variability in Older Women. Rodrigues JAL1, Santos BC2, Medeiros LH3, Gonçalves TCP3, Júnior CRB1,2,3.
Citat:
Abstract

Rodrigues, JAL, Santos, BC, Medeiros, LH, Gonçalves, TCP, and Júnior, CRB. Effects of different periodization strategies of combined aerobic and strength training on heart rate variability in older women. J Strength Cond Res XX(X): 000-000, 2019-The preservation of autonomic function has been proposed to be a key determinant of health and longevity. Periodization in combined training (CT) (strength plus aerobic exercise in the same session) might improve autonomic modulation. However, the specific influences of nonperiodized (NP), flexible nonlinear periodized (FNLP), and nonlinear periodized (NLP) strategies of CT on heart rate variability (HRV) are currently unknown. Therefore, we investigated the effects of NP, FNLP, and NLP strategies of CT on HRV in physically active women. In total, 54 physically active older women (61.6 ± 6.3 years) previously engaged in a regular exercise training were randomly allocated into 3 groups: NP, FNLP, and NLP. All the participants performed 12 weeks of training, 3 times per week, with the sessions divided into aerobic (bicycle or treadmill) and strength exercises. Before and after the exercise training, we examined anthropometric, body composition, and HRV measures (low-frequency [LF], high-frequency [HF], LF/HF, and root mean square successive difference of RR intervals [RMSSD]) during rest, a maximum exercise test, and recovery post-test. Mixed-model measures were used, and statistical significance was set at α = 0.05. The waist circumference reduced only in the NP group ([INCREMENT] = -2.01%). The RMSSD increased in the NLP ([INCREMENT] = 76.5%) and LF/HF ratio increased in the FNLP ([INCREMENT] = 34.51%) during the rest period. There were no differences during the exercise test and recovery after test for LF, HF, LF/HF, or RMSSD. In active women, nonlinear periodization strategies of CT improved one of the cardiovascular health outcomes because HRV is a direct predictor of cardiovascular risk.
Citat:
PRACTICAL APPLICATIONS
These data underline the importance of nonlinear periodization strategies of CT to promote adaptations in physically active women older than 50 years. Practitioners/clinicians or trainers working with active populations should promote NLP strategies to improve cardiovascular health outcomes because HRV is a direct predictor of cardiovascular risk.
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