Table 2. Summary of primary outcomes and time points of measurements.

Primary outcomes
Outcome		Parameter	Description	Data recording
Cardiovascular outcomes
Cardiac autonomic control	Time domain	SDNN	SD of all NN intervals (ms)	5 min epochs
		RMSSD	Square root of the mean of the sum of the squares of differences between adjacent NN intervals (ms)
	Frequency domain	LF	Power of the low frequency range in absolute values (ms2)
		HF	Power of the high frequency range in absolute values (ms2)
		LF n.u.	Power of the low frequency range in normalised units
		HF n.u.	Power of the high frequency range in normalised units
		Ratio LF/HF	Ratio
	Entropy	AmpEn	Approximate entropy
		SampEn	Sample entropy
Cardiac baroreflex		BRScount	Number of baroreflex sequences detected (n)	10 min epochs
		BRSslope	Magnitude of the baroreflex sensitivity (ms·mm Hg−1)
		BEI	Baroreflex effectiveness index (%)
Sympathetic vasomotor tone		LFsBP	Low frequency of systolic blood pressure (mm Hg2)
Haemodynamics		SBP	Systolic blood pressure (mm Hg)
		DBP	Diastolic blood pressure (mm Hg)
		MAP	Mean arterial pressure (mm Hg)
		HR	Heart rate (bpm)
		RPP	Rate pressure product (bpm·mm Hg)
Arterial stiffness		f-t PWV ft-PWV	Finger-toe pulse wave velocity (m·s−1)	Single assessment
		f-t TT; ft-TT	Finger-toe transit time (ms)
Resting metabolic outcomes
Metabolic responses		VO2	Oxygen uptake (mL·kg−1·min−1)	10 min epochs
		VCO2	Carbon dioxide production (mL·kg−1·min−1)
		RER	Respiratory exchange ratio