Table 2.

Physical and psychological exertion during the treadmill downhill running intervention in the grounded sleeping (GRD) and sham-grounded sleeping (UGD) group (mean ± SD).

	LApeak (mmol ⋅ L-1)	HRmax (bpm)	HRmean (bpm)	RPE (6–20)
GRD	3.2 ± 1.3	201 ± 12	177 ± 12	18.3 ± 0.8
UGD	5.1 ± 2.9∗	201 ± 8	177 ± 11	18.9 ± 0.7∗

LA_peak, peak lactate within the first 5-min post intervention; HR_max, maximal heart rate; HR_mean, mean heart rate; RPE, rate of perceived exertion (6–20 Borg scale); ^∗P < 0.05, different to GRD.