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Table 3 Relationships between Δ rMSSD vs. LF at rest, Δ rMSSD vs. HF at rest, Δ rMSSD vs. LF:HF ratio, Δ rMSSD vs. rMSSD at rest, and Δ rMSSD vs. SDNN at rest every 30 s into the recovery period for each of the three exercise conditions (N = 20)

From: Parasympathetic reactivation after maximal CPET depends on exercise modality and resting vagal activity in healthy men

Relationships

Exercise modality

 

Spearman’s correlation coefficient ( P value)

  

Exercise recovery time

 

30 s

60 s

90 s

120 s

150 s

180 s

Δ rMSSD vs. rMSSD at rest

Cycling

0.92 (<0.001)

0.92 (<0.001)

0.91 (<0.001)

0.91 (<0.001)

0.91 (<0.001)

0.90 (<0.001)

Walking

0.94 (<0.001)

0.94 (<0.001)

0.93 (<0.001)

0.93 (<0.001)

0.93 (<0.001)

0.92 (<0.001)

Running

0.96 (<0.001)

0.96 (<0.001)

0.96 (<0.001)

0.94 (<0.001)

0.94 (<0.001)

0.92 (<0.001)

Δ rMSSD vs. SDNN at rest

Cycling

0.96 (<0.001)

0.96 (<0.001)

0.94 (<0.001)

0.91 (<0.001)

0.91 (<0.001)

0.90 (<0.001)

Walking

0.96 (<0.001)

0.96 (<0.001)

0.94 (<0.001)

0.94 (<0.001)

0.94 (<0.001)

0.94 (<0.001)

Running

0.98 (<0.001)

0.98 (<0.001)

0.98 (<0.001)

0.97 (<0.001)

0.97 (<0.001)

0.96 (<0.001)

Δ rMSSD vs. HF at rest

Cycling

0.92 (<0.001)

0.91 (<0.001)

0.91 (<0.001)

0.90 (<0.001)

0.89 (<0.001)

0.90 (<0.001)

Walking

0.92 (<0.001)

0.91 (<0.001)

0.91 (<0.001)

0.91 (<0.001)

0.90 (<0.001)

0.92 (<0.001)

Running

0.92 (<0.001)

0.91 (<0.001)

0.91 (<0.001)

0.93 (<0.001)

0.92 (<0.001)

0.91 (<0.001)

Δ rMSSD vs. LF at rest

Cycling

−0.79 (<0.001)

−0.77 (<0.001)

−0.77 (<0.001)

−0.74 (<0.001)

−0.73 (<0.001)

−0.74 (<0.001)

Walking

−0.78 (<0.001)

−0.76 (<0.001)

−0.77 (<0.001)

−0.77 (<0.001)

−0.75 (<0.001)

−0.76 (<0.001)

Running

−0.78 (<0.001)

−0.79 (<0.001)

−0.79 (<0.001)

−0.78 (<0.001)

−0.77 (<0.001)

−0.77 (<0.001)

Δ rMSSD vs. LF:HF ratio at rest

Cycling

−0.89 (<0.001)

−0.88 (<0.001)

−0.88 (<0.001)

−0.87 (<0.001)

−0.86 (<0.001)

−0.87 (<0.001)

Walking

−0.88 (<0.001)

−0.87 (<0.001)

−0.88 (<0.001)

−0.87 (<0.001)

−0.87 (<0.001)

−0.88 (<0.001)

Running

−0.89 (<0.001)

−0.90 (<0.001)

−0.89 (<0.001)

−0.90 (<0.001)

−0.89 (<0.001)

−0.88 (<0.001)

  1. rMSSD = root-mean-square of the successive normal sinus R-R interval difference; SDNN = standard deviation of all normal R-R intervals; Delta (Δ) = resting rMSSD minus postexercise rMSSD; LF = high frequency component; HF = low frequency component; LF:HF ratio = sympathovagal balance.