Day-to-day reliability of basal heart rate and short-term and ultra short-term heart rate variability assessment by the Equivital eq02+ LifeMonitor in US Army soldiers.
BMJ Mil Health
; 2024 Jul 14.
Article
in En
| MEDLINE
| ID: mdl-39004444
ABSTRACT
INTRODUCTION:
The present study determined the (1) day-to-day reliability of basal heart rate (HR) and HR variability (HRV) measured by the Equivital eq02+ LifeMonitor and (2) agreement of ultra short-term HRV compared with short-term HRV.METHODS:
Twenty-three active-duty US Army Soldiers (5 females, 18 males) completed two experimental visits separated by >48 hours with restrictions consistent with basal monitoring (eg, exercise, dietary), with measurements after supine rest at minutes 20-21 (ultra short-term) and minutes 20-25 (short-term). HRV was assessed as the SD of R-R intervals (SDNN) and the square root of the mean squared differences between consecutive R-R intervals (RMSSD).RESULTS:
The day-to-day reliability (intraclass correlation coefficient (ICC)) using linear-mixed model approach was good for HR (0.849, 95% CI 0.689 to 0.933) and RMSSD (ICC 0.823, 95% CI 0.623 to 0.920). SDNN had moderate day-to-day reliability with greater variation (ICC 0.689, 95% CI 0.428 to 0.858). The reliability of RMSSD was slightly improved when considering the effect of respiration (ICC 0.821, 95% CI 0.672 to 0.944). There was no bias for HR measured for 1 min versus 5 min (p=0.511). For 1 min measurements versus 5 min, there was a very modest mean bias of -4 ms for SDNN and -1 ms for RMSSD (p≤0.023).CONCLUSION:
When preceded by a 20 min stabilisation period using restrictions consistent with basal monitoring and measuring respiration, military personnel can rely on the eq02+ for basal HR and RMSSD monitoring but should be more cautious using SDNN. These data also support using ultra short-term measurements when following these procedures.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
BMJ Mil Health
Year:
2024
Type:
Article
Affiliation country:
United States