As works from Kaikkonen, P. et al., (2010) where Post HRV was measured, comparing exercise values with segments Post1,2,3,4 5 and 14min in the TP, HF and LF and from Saboul, D. et al., (2015) where a baseline (pre-exercise 5 to 0min pre-exercise) was compared with a Post 5 (5-10min after exercise) and Post 30 (30-35min after exercise).
A protocol carry on 10min after exercise which measured values within 5min, 30 seconds after lay down in supine position could be right?
Can We compare values between different days?
bigger values in Rmssd, HF and TP is indicative of more stressful training session?
Thanks a lot,
Santiago Sanz
I know that the best time to test muscles is in the morning, because during the day the gravitation has impact in spine muscles but I didn.t know for other
Yes, but you need explain the motive why you will make the experimental procedure.
Becase some times the HRV isen't important.
Spectral analysis of HRV requires stationary time series. The cardiovascular system needs approx. 10 minutes after laying down to become stable. Measuring 30 seconds after lying will induce a complex cardiovascular process that is influenced by the preceeding exercise and the ongoing orthostatic response. HRV changes will be very difficult to interprete.
Thanks Professor Arie for the explanation!!!
In both works I mention the 10min lay down was not carried on. I understand hemodynamics must be normalized, but We try to measure inmediately response to exercise. I do a post 10min measure due to for a racing wheelchair users is harder to get out from the chair.
With able body athletes I would try the post 5min as Saboul, D. et al., (2015) . In the case of Kaikkonen, P. et al., (2010) they measured inmediately after exercise but the protocol is controversial due to they analyze Frequency domain parameter, one of them is HF domain parameter (0,15-0,4Hz) and not using metronome and the subjects didn´t lay down on a supine position, they recorded R-R on sitting position.
For a deeper understanding of my experimental situation What is your personal opinion of recording RR in the racing wheelchair position for a more practical situation and comfort of racing wheelchair athletes?
*See pic for racing wheelchair position
Thanks a lot to you and also professors Elizabeta and Gilmar for the answer!!!
Santiago Sanz
HR or HRV analysis does not require supine position. To investigate the effect of exercise, best way is by avoiding posture changes, so sitting at baseline and post-exercise is just fine! Many mental workload research is performed in sitting position. Problem remains that post-exercise the signals are not stationary. It requires a different approach to cope with the recovery effects.
Respiratory changes can be a problem, but if the frequency at baseline is not too low (resp. frequency >0.2 Hz) the effect is relatively small, assuming the frequency will be higher during (post-)exercise. Resp. frequencies below 0.2 Hz can have remarkable effects on HF as well as LF HRV without autonomic changes (Angelone & Coulter, 1964).
¡The very last question Professor Arie!
Empty bladder after exercise is a must for HRV analysis?
This question is related to the impossibility for a wheelchair racer user to do it until getting out from racing wheelchair because as you mentioned if avoid posture changes, measuring it at racing wheelchair would be fine.
Many thanks for your comments!
Santiago Sanz
I'm not aware of studies concerning bladder function and status in relation to HRV. We perform autonomic function tests for patient diagnostics and the measurements can last up to 2 hours measurement. We urge the patients to empty the bladder before the tests and fortunately the test can continue without bladder problems in most cases. Emptying the bladder immidiately post-exercise will interfere with the protocol that much, that the HRV measurement cannot be used. But this my personal opinion, I cannot refer to a publication to back this up.
Dear Santiago,
some problems could be solved with the use of non linear analyses in submaximal dynamic conditions after the stabilization of HR (> 2 min). Please, see our work in which we observed a better reliability when compared to other protocols.
https://www.researchgate.net/publication/260478733_Reliability_of_Heart_Rate_Measures_during_Walking_before_and_after_Running_Maximal_Efforts
We are utilizing this protocol with elite endurance athletes with nice results. Do not forget that HRR parameters are also very useful for autonomic evaluation!
Cheers,
Daniel
Article Reliability of Heart Rate Measures during Walking before and...
Many Thanks Arie and Daniel for the answers.
I will read the paper and I will start to measure HRV after training in the racing wheelchair position to see what results I get with this new protocol.
Thanks in advance,
Santiago Sanz
You are welcome!
See also the studies of Rohan Edmonds for other approaches with special Olympics:
https://www.researchgate.net/profile/Rohan_Edmonds
Cheers,
Daniel
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