Pattern of deoxy[Hb + Mb] during ramp cycle exercise: influence of aerobic fitness status

Boone, Jan; Koppo, Katrien; Barstow, Thomas J.; Bouckaert, Jacques

doi:10.1007/s00421-008-0969-2

Cited by 67 publications

(88 citation statements)

References 42 publications

(50 reference statements)

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“…The WR and _ VO 2 at the three thresholds were significantly higher in the HL group (Table 1), which was similar with the reported difference between well trained athletes and less trained subjects (Demello et al 1987;Boone et al 2009). The WR max and _ VO 2 max for the HL group were greater than those for the LL group, consistent with the significant difference in WR max , _ VO 2 max between welltrained and less-trained groups (Demello et al 1987;Boone et al 2009;Hug et al 2004), suggesting better aerobic fitness for the HL group, which might account for their better P800.…”

Section: The Visual Determination Of the Systemic Physiological Thressupporting

confidence: 91%

“…The WR max and _ VO 2 max for the HL group were greater than those for the LL group, consistent with the significant difference in WR max , _ VO 2 max between welltrained and less-trained groups (Demello et al 1987;Boone et al 2009;Hug et al 2004), suggesting better aerobic fitness for the HL group, which might account for their better P800.…”

Section: The Visual Determination Of the Systemic Physiological Thressupporting

confidence: 85%

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Comparisons of local and systemic aerobic fitness parameters between finswimmers with different athlete grade levels

et al. 2011

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To study the relationship between the local and systemic aerobic fitness parameters, and between the muscle oxygenation and aerobic performance, 16 female finswimmers were recruited and divided into high-level (HL) group and low-level group. Cardiorespiratory function, blood lactate concentration and near infrared spectroscopy muscle oxygenation in the vastus lateralis (VL) were monitored simultaneously during a maximal incremental exercise. We found that the break point (Bp) of the oxygenation index (OI) in the VL (BpVL) had significant correlations with lactate threshold (LT) and gas exchange threshold (GET), and the appearance sequence of the three thresholds was BpVL ≈ LT ≤ GET. When considering different levels, the [Formula: see text] at BpVL, LT and GET were higher in the HL group. During intensive exercise, there were significantly faster [Formula: see text] increase and evidently slower OI decrease in the HL group, suggesting that faster [Formula: see text] increase in the HL group slowed down the muscle deoxygenation and facilitated subjects to cycle to higher workloads. In conclusion, multi-modality approaches combining local and systemic physiological monitoring technologies might provide better explanations of the relationship between local and systemic aerobic fitness parameters, and might be a novel way to analyze the difference between groups of different levels.

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Section: The Visual Determination Of the Systemic Physiological Thressupporting

confidence: 91%

Section: The Visual Determination Of the Systemic Physiological Thressupporting

confidence: 85%

Comparisons of local and systemic aerobic fitness parameters between finswimmers with different athlete grade levels

et al. 2011

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“…The HHb levels during CWE exceeded those observed (Neary et al 2001;DeLorey et al 2003;Grassi et al 2003) because of its higher WR during CWE. In the present study, differences in HHb values during the end phase, from 90% to 100% of V 4 O 2max , may be because of the "HHb slow component" during CWE (Jones et al 2006;Bailey et al 2009;), a progressive increase in HHb throughout the steady state portion of the exercise, and "the plateau point" during IRE (Legrand et al 2007;Boone et al 2009;Osawa et al 2011;Spencer et al 2012). In the present study, the typical HHb kinetics (Fig.…”

Section: Discussionsupporting

confidence: 51%

Muscle Oxygen Extraction Is Higher during Constant Work Exercise than during Incremental Ramp Exercise

Yamamoto

Tabira

2014

Tohoku J. Exp. Med.

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A cardiopulmonary exercise test (CPX) can provide objective measures of exercise capacity. Specifically, incremental ramp exercise (IRE) and constant work-rate exercise (CWE) protocols are frequently used in clinical practice and for research. The CWE endurance time has shown larger increases than other indexes assessed by IRE after rehabilitation intervention. Muscle oxygen extraction is one of the important physiological factors of exercise capacity; however, the differences in muscle oxygen kinetics between IRE and CWE remain unclear. The purpose of this study was to compare the muscle oxygen kinetics during IRE and CWE. Each of the 15 participants performed IRE and CWE to exhaustion on a cycle ergometer. Ventilatory and muscle deoxygenation responses were measured during the tests; muscle deoxygenation was determined using near-infrared spectroscopy. No differences in oxygen uptake and heart rate were observed between the two tests. A comparison of the muscle deoxygenation kinetics between the two tests indicated significantly greater deoxygenation during the CWE than during the IRE at all time points (p < 0.05). The muscle deoxygenation kinetics, as percentages of maximal oxygen uptake (V 4 O 2max ), were higher during CWE than during IRE, except at 80% of V 4 O 2max (p < 0.05). These results suggest that skeletal muscle during CWE extracts oxygen at a rate comparable to that during IRE, and that exercise capacity assessed using CWE might be linked to a higher overall O 2 extraction. The fact that endurance time during CWE is more sensitive to rehabilitation intervention may be due to improvements in muscle oxygen extraction.

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“…The latter then stabilizes during the warm-up period. A recent study also calculated the NIRS data from the warming up (Boone et al 2009) because the measurements are more stable in these conditions. (Belardinelli et al 1995b;Grassi et al 1999Grassi et al , 2003MacDonald et al 1999;Maehara et al 1997).…”

Section: Nirs Measurementsmentioning

confidence: 98%

Exercise with hypoventilation induces lower muscle oxygenation and higher blood lactate concentration: role of hypoxia and hypercapnia

et al. 2010

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Eight men performed three series of 5-min exercise on a cycle ergometer at 65% of normoxic maximal O(2) consumption in four conditions: (1) voluntary hypoventilation (VH) in normoxia (VH(0.21)), (2) VH in hyperoxia (inducing hypercapnia) (inspired oxygen fraction [F(I)O(2)] = 0.29; VH(0.29)), (3) normal breathing (NB) in hypoxia (F(I)O(2) = 0.157; NB(0.157)), (4) NB in normoxia (NB(0.21)). Using near-infrared spectroscopy, changes in concentration of oxy-(Delta[O(2)Hb]) and deoxyhemoglobin (Delta[HHb]) were measured in the vastus lateralis muscle. Delta[O(2)Hb - HHb] and Delta[O(2)Hb + HHb] were calculated and used as oxygenation index and change in regional blood volume, respectively. Earlobe blood samples were taken throughout the exercise. Both VH(0.21) and NB(0.157) induced a severe and similar hypoxemia (arterial oxygen saturation [SaO(2)] < 88%) whereas SaO(2) remained above 94% and was not different between VH(0.29) and NB(0.21). Arterialized O(2) and CO(2) pressures as well as P50 were higher and pH lower in VH(0.21) than in NB(0.157), and in VH(0.29) than in NB(0.21). Delta[O(2)Hb] and Delta[O(2)Hb - HHb] were lower and Delta[HHb] higher at the end of each series in both VH(0.21) and NB(0.157) than in NB(0.21) and VH(0.29). There was no difference in Delta[O(2)Hb + HHb] between testing conditions. [La] in VH(0.21) was greater than both in NB(0.21) and VH(0.29) but not different from NB(0.157). This study demonstrated that exercise with VH induced a lower tissue oxygenation and a higher [La] than exercise with NB. This was caused by a severe arterial O(2) desaturation induced by both hypoxic and hypercapnic effects.

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Pattern of deoxy[Hb + Mb] during ramp cycle exercise: influence of aerobic fitness status

Cited by 67 publications

References 42 publications

Comparisons of local and systemic aerobic fitness parameters between finswimmers with different athlete grade levels

Comparisons of local and systemic aerobic fitness parameters between finswimmers with different athlete grade levels

Muscle Oxygen Extraction Is Higher during Constant Work Exercise than during Incremental Ramp Exercise

Exercise with hypoventilation induces lower muscle oxygenation and higher blood lactate concentration: role of hypoxia and hypercapnia

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