Low agreement of ventilatory threshold between training modes in cardiac patients

Hansen, Dominique; Dendale, Paul; Berger, Jan; Meeusen, Romain

doi:10.1007/s00421-007-0530-8

Cited by 24 publications

(20 citation statements)

References 32 publications

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“…Additionally, the mode used for CPX, typically a treadmill or lower-extremity ergometer, potentially impacts the VT response for a given individual. 37 Therefore, when VT is used to prescribe exercise intensity, the same mode should be used for both testing and training, as discussed further in the section on Exercise Prescription. Exercise training has been shown to increase V O 2 at the VT to a degree that is similar to that for peak or maximal V O 2 (typically 10% to 25% for previously sedentary individuals); thus, it is an important response to document clinically.…”

Section: Ventilatory Thresholdmentioning

confidence: 99%

Clinician’s Guide to Cardiopulmonary Exercise Testing in Adults

Balady¹,

Arena

Sietsema³

et al. 2010

Circulation

1,601

925

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E xercise testing remains a remarkably durable and versatile tool that provides valuable diagnostic and prognostic information regarding patients with cardiovascular and pulmonary disease. Exercise testing has been available for more than a half century and, like many other cardiovascular procedures, has evolved in its technology and scope. When combined with exercise testing, adjunctive imaging modalities offer greater diagnostic accuracy, additional information regarding cardiac structure and function, and additional prognostic information. Similarly, the addition of ventilatory gas exchange measurements during exercise testing provides a wide array of unique and clinically useful incremental information that heretofore has been poorly understood and underutilized by the practicing clinician. The reasons for this are many and include the requirement for additional equipment (cardiopulmonary exercise testing [CPX] systems), personnel who are proficient in the administration and interpretation of these tests, limited or absence of training of cardiovascular specialists and limited training by pulmonary specialists in this technique, and the lack of understanding of the value of CPX by practicing clinicians.Modern CPX systems allow for the analysis of gas exchange at rest, during exercise, and during recovery and yield breath-by-breath measures of oxygen uptake (V O 2 ), carbon dioxide output (V CO 2 ), and ventilation (V E). These advanced computerized systems provide both simple and complex analyses of these data that are easy to retrieve and store, which makes CPX available for widespread use. These data can be readily integrated with standard variables measured during exercise testing, including heart rate, blood pressure, work rate, electrocardiography findings, and symptoms, to provide a comprehensive assessment of exercise tolerance and exercise responses. CPX can even be performed with adjunctive imaging modalities for additional diagnostic assessment. Hence, CPX offers the clinician the ability to obtain a wealth of information beyond standard exercise electrocardiography testing that when appropriately applied and interpreted can assist in the management of complex cardiovascular and pulmonary disease.

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Section: Ventilatory Thresholdmentioning

confidence: 99%

Clinician’s Guide to Cardiopulmonary Exercise Testing in Adults

Balady¹,

Arena

Sietsema³

et al. 2010

Circulation

1,601

925

View full text Add to dashboard Cite

show abstract

“…and disease have reported that the V O 2 at the anaerobic (AT) or ventilatory (T vent ) threshold is significantly higher when incremental exercise testing is performed on a treadmill than on a cycle ergometer [9,12,15,18,19,23,25,30,32,43]. These Relationship between exercise-induced decreases (Δ) in plasma bicarbonate (HCO 3 -) concentrations and increases in the ventilation above and beyond that needed to support any given increment in oxygen uptake (i.e., excess ventilation) during submaximal and maximal exercise on a cycle ergometer and treadmill.…”

Section: 32b Ventilatory (Anaerobic) Threshold Numerous Studies mentioning

confidence: 99%

Physiological and perceptual responses to incremental exercise testing in healthy men: effect of exercise test modality

Muscat

Kotrach

Wilkinson-Maitland

et al. 2015

Appl. Physiol. Nutr. Metab.

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In a randomized cross-over study of 15 healthy men aged 20–30 years, we compared physiological and perceptual responses during treadmill and cycle exercise test protocols matched for increments in work rate — the source of increased locomotor muscle metabolic and contractile demands. The rates of O2 consumption and CO2 production were higher at the peak of treadmill versus cycle testing (p ≤ 0.05). Nevertheless, work rate, minute ventilation, tidal volume (VT), breathing frequency (fR), inspiratory capacity (IC), inspiratory reserve volume (IRV), tidal esophageal (Pes,tidal) and transdiaphragmatic pressure swings (Pdi,tidal), peak expiratory gastric pressures (Pga,peak), the root mean square of the diaphragm electromyogram (EMGdi,rms) expressed as a percentage of maximum EMGdi,rms (EMGdi,rms%max), and dyspnea ratings were similar at the peak of treadmill versus cycle testing (p > 0.05). Ratings of leg discomfort were higher at the peak of cycle versus treadmill exercise (p ≤ 0.05), even though peak O2 consumption was lower during cycling. Oxygen consumption, CO2 production, minute ventilation, fR, Pes,tidal, Pdi,tidal and Pga,peak were higher (p ≤ 0.05), while VT, IC, IRV, EMGdi,rms%max, and ratings of dyspnea and leg discomfort were similar (p > 0.05) at all or most submaximal work rates during treadmill versus cycle exercise. Our findings highlight important differences (and similarities) in physiological and perceptual responses at maximal and submaximal work rates during incremental treadmill and cycle exercise testing protocols. The lack of effect of exercise test modality on peak work rate advocates for the use of this readily available parameter to optimize training intensity determination, regardless of exercise training mode.

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“…was calculated [13] by V-slope method, as executed in previous studies from our laboratory [14]. Ventilatory threshold is used to estimate the anaerobic threshold, which is the exercise intensity at which lactic acid starts to accumulate in the circulation (as a result of anaerobic metabolism).…”

Section: Physical Fitness Tests Cardiopulmonary Exercise Capacitymentioning

confidence: 99%

Physical fitness affects the quality of single operator cardiocerebral resuscitation in healthcare professionals

Hansen

Vranckx

Broekmans

et al. 2012

European Journal of Emergency Medicine

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Objective Sustained external chest compressions during cardiocerebral resuscitation (CCR) are physically demanding. It might be hypothesized that a high cardiopulmonary exercise capacity and/or muscle strength delays the development of physical fatigue and, consequently, preserves CCR quality. We intended to assess the impact of cardiopulmonary exercise capacity and muscle strength on CCR quality.Methods Fifteen healthcare professionals (10 men and five women, mean age 34 ± 9 years) performed a 15-min hands-on CCR session on an adult training manikin. CCR compression depth (from which CCR quality was calculated) and frequency were monitored. During CCR we assessed serial blood lactate concentrations, and provided continuous heart rate monitoring. Relationships were examined between participant characteristics, peak cardiopulmonary exercise capacity, ventilatory threshold, maximal muscle strength, muscle strength endurance and CCR quality.Results Significant univariate correlations were found between 15-min CCR quality and body height (r = 0.53), ventilatory threshold (r = 0.67), peak oxygen uptake capacity (r = 0.54), peak cycling power output (r = 0.54), and maximal isometric elbow extension strength (r = 0.55) (P < 0.05). CCR quality was significantly lower in females, when compared with males (P < 0.05). Within different timeframes, CCR quality was mainly related to the ventilatory threshold up to the first 5 min (P < 0.05), whereas CCR quality was mainly related to maximal isometric elbow extension strength after 5 min (P < 0.05).Conclusion In healthcare professionals, the ventilatory threshold is significantly related to CCR quality during the first few min. Healthcare professionals who are regularly involved in CCR should therefore aim to achieve/sustain a high aerobic exercise capacity.

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Low agreement of ventilatory threshold between training modes in cardiac patients

Cited by 24 publications

References 32 publications

Clinician’s Guide to Cardiopulmonary Exercise Testing in Adults

Clinician’s Guide to Cardiopulmonary Exercise Testing in Adults

Physiological and perceptual responses to incremental exercise testing in healthy men: effect of exercise test modality

Physical fitness affects the quality of single operator cardiocerebral resuscitation in healthcare professionals

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