Relationship between isocapnic buffering and maximal aerobic capacity in athletes

Oshima, Yoshitake; Miyamoto, Tadayoshi; Tanaka, Shigehiro; Wadazumi, Tsuyoshi; Kurihara, Naotsugu; Fujimoto, Shigeo

doi:10.1007/s004210050269

Cited by 34 publications

(32 citation statements)

References 20 publications

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“…In this study, the ICB phase was higher in team sport athletes than endurance athletes despite the VO2max being higher in the endurance athletes. Oshima et al showed that the ICB phase is more strongly correlated with the VO2max than the AT in athletes (7). However, the sample size was too small for regression analysis in these studies.…”

Section: Discussionmentioning

confidence: 82%

“…Previous studies indicated a positive correlation between the ICB phase and VO2max in athletes (7,23). On the other hand, according to some researchers, the ICB phase is not related to the endurance performance in endurance athletes (11).…”

Section: Discussionmentioning

confidence: 91%

“…Some researchers suggested that the ICB phase contributes to the aerobic capacity in athletes (7). Previous studies indicated a positive correlation between the ICB phase and VO2max in athletes (7,23).…”

Section: Discussionmentioning

confidence: 99%

“…The region between the AT and RCP is defined as the isocapnic buffering (ICB) phase and represents a phase of compensation for the exercise-induced metabolic acidosis (5). The region between the RCP and the end of exercise is defined as the phase of hypocapnic hyperventilation (HHV) (6,7).…”

Section: Introductionmentioning

confidence: 99%

“…Some researchers suggested that the ICB phase contributes to the aerobic capacity in athletes (7). On the other hand, according to some researchers, the ICB is not related to endurance performance (11).…”

Section: Introductionmentioning

confidence: 99%

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The Relationship between the Isocapnic Buffering Phase and Ventilatory Threshold in Endurance Athletes and Team Sport Athletes during an Incremental Exercise Test

Eryılmaz

Polat

Soyal³

et al. 2018

Ann. Appl. Sport Sci

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Background. There is sparse literature examining the ICB phase of aerobic-and anaerobic-trained athletes. Measurements of ICB phase values of athletes can help to evaluate the sport's physiological demands and understand the physiological adaptations in response to physical training. Objectives. The purpose of this study was to examine the relationship between the isocapnic buffering (ICB) phase and the maximal oxygen uptake (VO2max) as well as the ventilatory threshold (VT) in trained athletes. Methods. Twenty-eight male endurance athletes and forty male team sports athletes underwent an incremental treadmill test to determine their VT, respiratory compensation point (RCP), and VO2max. The ICB phase was calculated as the difference in Oxygen uptake (VO2) between the RCP and VT and expressed in either absolute or relative values. Results. The VO2max, maximal running speed, time to exhaustion, VO2 at the VT and RCP, running speed at the VT, and VT expressed as % VO2max was higher in the endurance athletes than in the team sport athletes (p < 0.01), whereas the RCP expressed as % VO2max and running speed at the RCP showed similar values in both groups (p > 0.05). Both the absolute and relative ICB phase values were found to be significantly higher in team sports athletes than in endurance athletes (p < 0.001). The relative ICB phase was significantly negatively correlated with the VO2max (-r = 0.517, p < 0.001), the VO2 at the VT (-r = 0.755, p < 0.001), and the VO2 at the RCP (r = -0.517, p = 0.001). Conclusion. The current findings suggest that, for trained athletes, the magnitude of the ICB phase is more closely related to the VT rather than the VO2max and RCP. Presumably, the high-intensity intermittent-type exercises performed by team sports athletes may have improved their buffering capacity, leading to a shift in the RCP without a change in the VT, and consequently enhancing the ICB phase.

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Section: Discussionmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Relationship between the Isocapnic Buffering Phase and Ventilatory Threshold in Endurance Athletes and Team Sport Athletes during an Incremental Exercise Test

Eryılmaz

Polat

Soyal³

et al. 2018

Ann. Appl. Sport Sci

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Exercise capacity in young adults with hypertension and systolic blood pressure difference between right arm and leg after repair of coarctation of the aorta

et al. 2004

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Coarctation of the aorta represents 5-7% of congenital heart defects. Symptoms and prognosis depend on the degree of stenosis, age at surgery, surgical method and the presence of other heart defects. Postoperative complications are hypertension, restenosis and an abnormal blood pressure response during exercise. This study includes 41 patients, 15-40 years old, operated in the period 1975-1996. All were exercised on a treadmill until maximal oxygen consumption was achieved. Blood pressure was measured in the right arm and leg before and immediately after exercise, and in the right arm during exercise. Oxygen consumption was monitored and we defined an aerobic phase, an isocapnic buffering phase and a hypocapnic hyperventilation phase. The resting systolic blood pressure correlates with the resting systolic blood pressure difference between right arm and leg. A resting systolic blood pressure difference between the right arm and leg of 0.13 kPa (1 mmHg) to 2.67 kPa (20 mmHg) corresponds with a slight increase in resting systolic blood pressure. This rise in blood pressure increases the aerobic phase of the exercise test, helping the patients to achieve higher maximal oxygen consumption. A resting systolic blood pressure difference of more than 2.67 kPa (20 mmHg) corresponds with severe hypertension and causes reduction in the aerobic phase and maximal oxygen consumption. Resting systolic blood pressure and resting systolic blood pressure difference between the right arm and leg are not indicators for blood pressure response during exercise. Exercise testing is important to reveal exercise-induced hypertension and to monitor changes in transition from aerobic to anaerobic exercise and limitation to exercise capacity.

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Muscle fibre conduction velocity and cardiorespiratory response during incremental cycling exercise in young and older individuals with different training status

Lenti¹,

Vito²,

Sbriccoli³

et al. 2010

Journal of Electromyography and Kinesiology

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Relationship between isocapnic buffering and maximal aerobic capacity in athletes

Cited by 34 publications

References 20 publications

The Relationship between the Isocapnic Buffering Phase and Ventilatory Threshold in Endurance Athletes and Team Sport Athletes during an Incremental Exercise Test

The Relationship between the Isocapnic Buffering Phase and Ventilatory Threshold in Endurance Athletes and Team Sport Athletes during an Incremental Exercise Test

Exercise capacity in young adults with hypertension and systolic blood pressure difference between right arm and leg after repair of coarctation of the aorta

Muscle fibre conduction velocity and cardiorespiratory response during incremental cycling exercise in young and older individuals with different training status

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