Abstract
Several indicators are used as indices of cardiorespiratory reserve. Among them, oxygen uptake (VO 2 ) at peak and ventilatory threshold (VAT) levels are the most common used. In the present study, endurance training was used to evaluate and compare the usefulness of a new index, the Oxygen Uptake Efficiency Slope (OUES) as an alternative to the previous ones. Fifteen physical education student women participated in the study (8 as a trained group [T: age (mean ± SD) 21.9±3.3 y, height 165.1 :: 5.5 cm, weight 60.4±3.3 kg] and 7 as a control group [C: age 21.7±1.9 y, height 165.4±7.2 cm, weight 59.6±8.6 kg]). Before and after 6 weeks of the Square-Wave Endurance Exercise Test (SWEET) training program or daily activities, they performed an incremental test (30 W/3 min) on a cycle ergometer to determined V̇O 2 , power output and parameters associated with breathing efficiency (the respiratory equivalents, and the ventilatory dead space to tidal volume ratio [Vd/Vt]) at peak-and VAT-levels. The slope of the relationship between ventilation and carbon dioxide production was also calculated. OUES, derived from the logarithmic relationship between V̇O 2 and minute ventilation (V̇ E ), was determined at 75% (OUES75), 90% (OUES90) and 100% (OUES100) of exercise duration. After endurance training in T, V̇O 2 and power output were significantly improved at peak- and VAT-levels while all breathing efficiency indices remained unchanged. No changes were observed in C after 6 weeks. Despite significant correlation between OUES values and V̇O 2 at peak- and VAT-levels. OUES75, OUES90 and OUES100 did not significantly change after endurance training. While V̇O 2 and power output at peak- and VAT-levels increased in all T, training-induced changes in OUES appeared more variable. We concluded that OUES was not sufficiently sensitive to highlight improvement of cardiorespiratory reserve after endurance training whereas V̇O 2 at peak and VAT levels did.
| Original language | English |
|---|---|
| Pages (from-to) | 85-91 |
| Number of pages | 7 |
| Journal | International Journal of Sports Medicine |
| Volume | 25 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1 Feb 2004 |
| Externally published | Yes |
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Keywords
- Cycle ergometer
- Healthy subject
- Peak oxygen uptake
- SWEET training
- Ventilatory anaerobic threshold
ASJC Scopus subject areas
- Orthopedics and Sports Medicine
- Physical Therapy, Sports Therapy and Rehabilitation
Cite this
Evaluation of Fitness Level by the Oxygen Uptake Efficiency Slope after a Short-Term Intermittent Endurance Training. / Mourot, L.; Perrey, S.; Tordi, N.; Rouillon, J. D.
In: International Journal of Sports Medicine, Vol. 25, No. 2, 01.02.2004, p. 85-91.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Evaluation of Fitness Level by the Oxygen Uptake Efficiency Slope after a Short-Term Intermittent Endurance Training
AU - Mourot, L.
AU - Perrey, S.
AU - Tordi, N.
AU - Rouillon, J. D.
PY - 2004/2/1
Y1 - 2004/2/1
N2 - Several indicators are used as indices of cardiorespiratory reserve. Among them, oxygen uptake (VO 2 ) at peak and ventilatory threshold (VAT) levels are the most common used. In the present study, endurance training was used to evaluate and compare the usefulness of a new index, the Oxygen Uptake Efficiency Slope (OUES) as an alternative to the previous ones. Fifteen physical education student women participated in the study (8 as a trained group [T: age (mean ± SD) 21.9±3.3 y, height 165.1 :: 5.5 cm, weight 60.4±3.3 kg] and 7 as a control group [C: age 21.7±1.9 y, height 165.4±7.2 cm, weight 59.6±8.6 kg]). Before and after 6 weeks of the Square-Wave Endurance Exercise Test (SWEET) training program or daily activities, they performed an incremental test (30 W/3 min) on a cycle ergometer to determined V̇O 2 , power output and parameters associated with breathing efficiency (the respiratory equivalents, and the ventilatory dead space to tidal volume ratio [Vd/Vt]) at peak-and VAT-levels. The slope of the relationship between ventilation and carbon dioxide production was also calculated. OUES, derived from the logarithmic relationship between V̇O 2 and minute ventilation (V̇ E ), was determined at 75% (OUES75), 90% (OUES90) and 100% (OUES100) of exercise duration. After endurance training in T, V̇O 2 and power output were significantly improved at peak- and VAT-levels while all breathing efficiency indices remained unchanged. No changes were observed in C after 6 weeks. Despite significant correlation between OUES values and V̇O 2 at peak- and VAT-levels. OUES75, OUES90 and OUES100 did not significantly change after endurance training. While V̇O 2 and power output at peak- and VAT-levels increased in all T, training-induced changes in OUES appeared more variable. We concluded that OUES was not sufficiently sensitive to highlight improvement of cardiorespiratory reserve after endurance training whereas V̇O 2 at peak and VAT levels did.
AB - Several indicators are used as indices of cardiorespiratory reserve. Among them, oxygen uptake (VO 2 ) at peak and ventilatory threshold (VAT) levels are the most common used. In the present study, endurance training was used to evaluate and compare the usefulness of a new index, the Oxygen Uptake Efficiency Slope (OUES) as an alternative to the previous ones. Fifteen physical education student women participated in the study (8 as a trained group [T: age (mean ± SD) 21.9±3.3 y, height 165.1 :: 5.5 cm, weight 60.4±3.3 kg] and 7 as a control group [C: age 21.7±1.9 y, height 165.4±7.2 cm, weight 59.6±8.6 kg]). Before and after 6 weeks of the Square-Wave Endurance Exercise Test (SWEET) training program or daily activities, they performed an incremental test (30 W/3 min) on a cycle ergometer to determined V̇O 2 , power output and parameters associated with breathing efficiency (the respiratory equivalents, and the ventilatory dead space to tidal volume ratio [Vd/Vt]) at peak-and VAT-levels. The slope of the relationship between ventilation and carbon dioxide production was also calculated. OUES, derived from the logarithmic relationship between V̇O 2 and minute ventilation (V̇ E ), was determined at 75% (OUES75), 90% (OUES90) and 100% (OUES100) of exercise duration. After endurance training in T, V̇O 2 and power output were significantly improved at peak- and VAT-levels while all breathing efficiency indices remained unchanged. No changes were observed in C after 6 weeks. Despite significant correlation between OUES values and V̇O 2 at peak- and VAT-levels. OUES75, OUES90 and OUES100 did not significantly change after endurance training. While V̇O 2 and power output at peak- and VAT-levels increased in all T, training-induced changes in OUES appeared more variable. We concluded that OUES was not sufficiently sensitive to highlight improvement of cardiorespiratory reserve after endurance training whereas V̇O 2 at peak and VAT levels did.
KW - Cycle ergometer
KW - Healthy subject
KW - Peak oxygen uptake
KW - SWEET training
KW - Ventilatory anaerobic threshold
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U2 - 10.1055/s-2004-819943
DO - 10.1055/s-2004-819943
M3 - Article
VL - 25
SP - 85
EP - 91
JO - International Journal of Sports Medicine
JF - International Journal of Sports Medicine
SN - 0172-4622
IS - 2
ER -