Relationship of post-exercise muscle oxygenation and duration of cycling exercise

Table 2 Recovery parameters for ΔO2Hb, ΔHHb, and ΔTHb

Exercise duration	30 s	60 s	90 s	120 s	240 s
OS_THb (Δμmol^.l⁻¹)	3.05 ± 1.26	6.00 ± 2.78	6.97 ± 2.11	6.98 ± 2.30	7.25 ± 3.03
OS_O₂Hb (Δμmol^.l⁻¹)	1.09 ± 1.32	4.79 ± 2.37	6.34 ± 1.88	6.54 ± 2.90	5.98 ± 2.75
GET60+: OS_O₂Hb (Δμmol^.l⁻¹)	1.14 ± 1.60	6.00 ± 2.70	7.02 ± 2.11	--	6.08 ± 2.15
GET60−: OS_O₂Hb (Δμmol^.l⁻¹)	1.06 ± 1.19	4.02 ± 1.88	5.91 ± 1.67	--	5.91 ± 3.18
Recovery of ΔTHb (s)	198 ± 86	206 ± 82	199 ± 65	210 ± 57	234 ± 37
Recovery of ΔO₂Hb (s)	243 ± 56	222 ± 66	239 ± 23	195 ± 71	227 ± 56
Recovery of ΔHHb (s)	212 ± 88	210 ± 76	206 ± 79	185 ± 84	243 ± 31
SD_REC_ ΔTHb (Δμmol^.l⁻¹)	0.18 ± 0.21	0.36 ± 0.27	0.24 ± 0.12	0.21 ± 0.14	0.26 ± 1.23
SD_REC_ ΔO₂Hb (Δμmol^.l⁻¹)	0.19 ± 0.13	0.34 ± 0.28	0.34 ± 0.12	0.20 ± 0.09	0.28 ± 0.25
SD_REC_ ΔHHb (Δμmol^.l⁻¹)	0.11 ± 0.09	0.20 ± 0.09	0.11 ± 0.05	0.15 ± 0.09	0.12 ± 0.04
Time-to-peak ΔTHb (s)	57 ± 29	65 ± 50	79 ± 57	71 ± 37	72 ± 44
Time-to-peak ΔO₂Hb (s)	151 ± 81*	103 ± 59	81 ± 26	91 ± 48	94 ± 39
End-exercise % \( \overset{.}{\mathrm{V}}{\mathrm{O}}_2 \) (%)	43 ± 8*	73 ± 5	81 ± 6	82 ± 6	86 ± 5

n = 18 (except GET60+/−); values are expressed as mean ± SD; Significant results for OS_THb/O₂Hb are presented in Fig. 4; SD_REC_ΔTHb/O₂Hb/HHb represent the average standard deviation of the last 30 s of recovery; Time-to-peak values indicate the time from cessation of exercise to the highest value reached during the subsequent recovery period (asterisks indicate significant higher values compared to the other values, ** P < 0.01); End-exercise % \( \overset{.}{\mathrm{V}}{\mathrm{O}}_2 \) values are averaged values obtained from the final 10 s of each bout

ISSN: 2052-1847