What did this study find?
This 2021 controlled study reported improved heart rate variability parameters and shorter recovery time in participants completing heart rate variability biofeedback. Reporting is limited, with a small sample and no blinded comparison, so the finding is best read as consistent with the wider recovery literature rather than as independent evidence.
What are the details of this record?
- Full citation
- HRV Biofeedback and Recovery Time. 2021. PMID: 33403512.
- Study design
- Controlled clinical study
- Sample size and population
- Not reported in the published record
- Evidence grade
- Grade B- on the BioReg grading scale
- Reported findings
- Improved HRV parameters and shorter recovery time.
- DOI
- No DOI recorded
- PubMed
- PMID 33403512
- Related categories
- HRV Biofeedback (category grade B+)
A positive PEMF study is not evidence for a specific device unless the signal parameters studied, frequency, intensity, waveform, and exposure duration, are reasonably comparable to what that device produces. Where this record does not list those parameters, the source report did not publish them. See the grading methodology. Library last reviewed 2026-08-27.