Effect of pedal cadence on the accumulated oxygen deficit, maximal aerobic power and blood lactate transition thresholds of high-performance junior endurance cyclists

AbstractThis study aimed to test if the non-oxidative energy supply (estimated by the accumulated oxygen deficit) is associated with an index of muscle lactate accumulation during exercise, muscle monocarboxylate transporter content and the lactate removal ability during recovery in well-trained rowers. Seventeen rowers completed a 3-min all-out exercise on rowing ergometer to estimate the accumulated oxygen deficit. Blood lactate samples were collected during the subsequent passive recovery to assess individual blood lactate curves, which were fitted to the bi-exponential time function: La(t)= [La](0)+A1·(1–e–γ 1 t)+A2·(1–e–γ 2 t), where the velocity constants γ1 and γ2 (min–1) denote the lactate exchange and removal abilities during recovery, respectively. The accumulated oxygen deficit was correlated with the net amount of lactate released from the previously active muscles (r =0.58, P<0.05), the monocarboxylate transporters MCT1 and MCT4 (r=0.63, P<0.05) and γ2 (r=0.55, P<0.05). γ2 and the lactate release rate at exercise completion were negatively correlated with citrate synthase activity. These findings suggest that the capacity to supply non-oxidative energy during supramaximal rowing exercise is associated with muscle lactate accumulation and transport, as well as lactate removal ability.

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Anaerobic Capacity: A Maximal Anaerobic Running Test Versus the Maximal Accumulated Oxygen Deficit

Canadian Journal of Applied Physiology ◽

10.1139/h96-004 ◽

1996 ◽

Vol 21 (1) ◽

pp. 35-47 ◽

Cited By ~ 13

Author(s):

Neil S. Maxwell ◽

Myra A. Nimmo

Keyword(s):

Blood Lactate ◽

Intermittent Exercise ◽

Anaerobic Capacity ◽

Capillary Blood ◽

Treadmill Running ◽

Oxygen Deficit ◽

Blood Samples ◽

Significant Difference ◽

Accumulated Oxygen Deficit ◽

Exercise Treadmill

The present investigation evaluates a maximal anaerobic running test (MART) against the maximal accumulated oxygen deficit (MAOD) for the determination of anaerobic capacity. Essentially, this involved comparing 18 male students performing two randomly assigned supramaximal runs to exhaustion on separate days. Post warm-up and 1, 3, and 6 min postexercise capillary blood samples were taken during both tests for plasma blood lactate (BLa) determination. In the MART only, blood ammonia (BNH3) concentration was measured, while capillary blood samples were additionally taken after every second sprint for BLa determination. Anaerobic capacity, measured as oxygen equivalents in the MART protocol, averaged 112.2 ± 5.2 ml∙kg−1∙min−1. Oxygen deficit, representing the anaerobic capacity in the MAOD test, was an average of 74.6 ± 7.3 ml∙kg−1. There was a significant correlation between the MART and MAOD (r =.83, p <.001). BLa values obtained over time in the two tests showed no significant difference, nor was there any difference in the peak BLa recorded. Peak BNH3 concentration recorded was significantly increased from resting levels at exhaustion during the MART. Key words: supramaximal intermittent exercise, treadmill running performance, blood lactate, ammonia

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Assessment of Child-Specific Aerobic Fitness and Anaerobic Capacity by the Use of the Power-Time Relationships Constants

Pediatric Exercise Science ◽

10.1123/pes.22.3.454 ◽

2010 ◽

Vol 22 (3) ◽

pp. 454-466 ◽

Cited By ~ 7

Author(s):

Erwan Leclair ◽

Benoit Borel ◽

Delphine Thevenet ◽

Georges Baquet ◽

Patrick Mucci ◽

...

Keyword(s):

Critical Power ◽

Aerobic Power ◽

Anaerobic Capacity ◽

Work Capacity ◽

Constant Load ◽

Evaluation Methods ◽

Oxygen Deficit ◽

Anaerobic Work Capacity ◽

Accumulated Oxygen Deficit ◽

Anaerobic Work

This study first aimed to compare critical power (CP) and anaerobic work capacity (AWC), to laboratory standard evaluation methods such as maximal oxygen uptake (V̇O2max) and maximal accumulated oxygen deficit (MAOD). Secondly, this study compared child and adult CP and AWC values. Subjects performed a maximal graded test to determine V̇O2max and maximal aerobic power (MAP); and four constant load exercises. In children, CP (W.kg−1) was related to V̇O2max (ml.kg−1.min−1; r = .68; p = .004). AWC (J.kg−1) in children was related to MAOD (r = .58; p = .018). Children presented lower AWC (J.kg−1; p = .001) than adults, but similar CP (%MAP) values. CP (%MAP and W.kg−1) and AWC (J.kg−1) were significantly related to laboratory standard evaluation methods but low correlation indicated that they cannot be used interchangeably. CP (%MAP) was similar in children and adults, but AWC (J.kg−1) was significantly lower in children. These conclusions support existing knowledge related to child-adults characteristics.

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Estimation of accumulated oxygen deficit from accumulated blood lactate concentration during supramaximal running in middle-distance runners

The Journal of Physical Fitness and Sports Medicine ◽

10.7600/jpfsm.6.359 ◽

2017 ◽

Vol 6 (5) ◽

pp. 359-363 ◽

Cited By ~ 2

Author(s):

Fumiya Tanji ◽

Toshiki Tsuji ◽

Wataru Shimazu ◽

Yoshiharu Nabekura

Keyword(s):

Blood Lactate ◽

Lactate Concentration ◽

Blood Lactate Concentration ◽

Oxygen Deficit ◽

Distance Runners ◽

Accumulated Oxygen Deficit

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Furosemide reduces accumulated oxygen deficit in horses during brief intense exertion

Journal of Applied Physiology ◽

10.1152/jappl.1996.81.4.1550 ◽

1996 ◽

Vol 81 (4) ◽

pp. 1550-1554 ◽

Cited By ~ 28

Author(s):

K. W. Hinchcliff ◽

K. H. McKeever ◽

W. W. Muir ◽

R. A. Sams

Keyword(s):

Blood Lactate ◽

High Intensity ◽

Lactate Concentration ◽

Blood Lactate Concentration ◽

High Intensity Exercise ◽

Oxygen Deficit ◽

Specific Rate ◽

Rate Of Increase ◽

Accumulated Oxygen Deficit ◽

Plasma Lactate Concentration

Hinchcliff, K. W., K. H. McKeever, W. W. Muir, and R. A. Sams. Furosemide reduces accumulated oxygen deficit in horses during brief intense exertion. J. Appl. Physiol. 81(4): 1550–1554, 1996.—We theorized that furosemide-induced weight reduction would reduce the contribution of anaerobic metabolism to energy expenditure of horses during intense exertion. The effects of furosemide on accumulated O2 deficit and plasma lactate concentration of horses during high-intensity exercise were examined in a three-way balance randomized crossover study. Nine horses completed each of three trials: 1) a control (C) trial, 2) a furosemide-unloaded (FU) trial in which the horse received furosemide 4 h before running, and 3) a furosemide weight-loaded (FL) trial during which the horse received furosemide and carried weight equal to the weight lost after furosemide administration. Horses ran for 2 min at ∼120% maximal O2 consumption. Furosemide (FU) increased O2 consumption (ml ⋅ 2 min−1 ⋅ kg−1) compared with C (268 ± 9 and 257 ± 9, P < 0.05), whereas FL was not different from C (252 ± 8). Accumulated O2 deficit (ml O2 equivalents/kg) was significantly ( P < 0.05) lower during FU (81.2 ± 12.5), but not during FL (96.9 ± 12.4), than during C (91.4 ± 11.5). Rate of increase in blood lactate concentration (mmol ⋅ 2 min−1 ⋅ kg−1) after FU (0.058 ± 0.001), but not after FL (0.061 ± 0.001), was significantly ( P < 0.05) lower than after C (0.061 ± 0.001). Furosemide decreased the accumulated O2 deficit and rate of increase in blood lactate concentration of horses during brief high-intensity exertion. The reduction in accumulated O2 deficit in FU-treated horses was attributable to an increase in the mass-specific rate of O2 consumption during the high-intensity exercise test.

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