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. 2019 Feb 28;14(2):e0212047. doi: 10.1371/journal.pone.0212047

Table 3. Metabolic power data and energy cost for elite junior, elite and sub-elite Australian footballers.

Values are mean (95% CI).

	Youth	Elite Senior	Youth vs Elite Senior (Effect Size d)	Sub-Elite Senior	Youth vs Sub-Elite (Effect Size d)
Peak Metabolic Power (W·kg^-1)	195.48 (189.63–210.32)	168.74 (162.36–175.23)^a	0.41	165.29(155.48–175.10)^a	0.19
Average Energy Expenditure (kJ·kg^-1)	47.81(46.38–49.22)	62.55 (61.85–63.15^a	2.19	59.61 (58.57–60.65)^a ^b	1.58
Estimated Distance (ED)	13856 (13469–14244)	16959 (16788–17130)^a	1.73	16373 (16099–16646)^a ^b	1.12
Estimated Distance Index	1.269 (1.262–1.276)	1.283 (1.280–1.287)^a	0.49	1.248 (1.242–1.253)^a ^b	0.27
Time Spent (W·kg^-1.min^-1)
Low Power	73.06 (71.28–74.84)	82.73 (81.85–83.60)^a	0.91	90.91 (89.55–92.28)^a ^b	1.45
High Power	7.10 (6.67–7.53)	10.31 (10.08–10.54)^a	1.76	8.87 (8.52–9.23)^a ^b	1.04
Very High power	1.85 (1.70–1.99)	2.71 (2.63–2.77)^a	1.57	2.15 (2.04–2.26)^a ^b	0.67
% Time Spent (W·kg^-1.%min^-1)
Low Power	85.51 (84.81–86.22)	82.25 (81.88–82.63)^a	1.16	85.86 (85.27–86.44)^b	0.23
High Power	8.00 (7.51–8.49)	10.29 (9.99–10.47)^a	1.18	8.58 (8.20–8.95)^b	0.38
Very High power	2.05 (1.91–2.19)	2.67 (2.60–2.74)^a	1.10	2.06 (1.95–2.17)^b	0.10
Number of Efforts (W·kg^-1.n·min^-1)
Low Power	353.75 (340.49–367.01)	508.83 (501.57–516.08)^a	2.37	475.78 (464.66–486.91)^a ^b	1.60
High Power	158.46 (150.75–166.17)	223.36 (219.38–227.34)^a	1.96	195.99 (189.81–202.16)^a ^b	1.18
Very High power	56.34 (51.56–61.13)	81.47 (79.07–83.86)^a	1.38	66.08 (62.31–69.84)^a ^b	0.64

^a Significantly different to elite junior AFL players (P<0.05).

^b Significantly different to elite AFL players (P<0.05).