OBJECTIVE: Exercise training efficiently improves peak @entity26 uptake (V  O2peak) in @entity1 with @entity712 . To optimize training-derived benefit, higher exercise intensities are being explored. The correct identification of anaerobic threshold is important to allow safe and effective exercise prescription. DESIGN: During 48 cardiopulmonary exercise tests obtained in @entity1 with @entity712 (59.6    11 yrs; left ventricular ejection fraction, 27.9%    9%), ventilatory gas analysis findings and @entity880 measurements were collected. Three technicians independently determined the @entity1576 ( @entity1576 ), the heart rate turning point (HRTP) and the second lactate turning point (LTP2). Thereafter, exercise intensity (target heart rate and workload) was calculated and compared between the three methods applied. RESULTS: @entity1 had significantly reduced maximal exercise capacity (68%    21% of predicted V  O2peak) and chronotropic @entity337 (74%    7% of predicted peak heart rate). Heart rate, workload, and @entity4962 at HRTP and at @entity1576 were not different, but at LTP2, these parameters were significantly (P < 0.0001) higher. Mean target heart rate and target workload calculated using the LTP2 were 5% and 12% higher compared with those calculated using HRTP and @entity1576 , respectively. The calculation of target heart rate based on LTP2 was 5% and 10% higher in 12 of 48 (25%) and 6 of 48 (12.5%) @entity1 , respectively, compared with the other two methods. CONCLUSIONS: In @entity1 with @entity712 , @entity1576 and HRTP, determined during cardiopulmonary exercise tests, precede the occurrence of LTP2. Target heart rates and workloads used to prescribe tailored exercise training in @entity1 with @entity712 based on LTP2 are significantly higher than those derived from HRTP and @entity1576 .

Comparison of three methods to identify the anaerobic threshold during maximal exercise testing in XXXX with @entity712 .

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients'] @entity712 :: ('MESH:D006333', 'Disease') :: ['chronic heart failure'] @entity4962 :: ('CHEBI:30046', 'Chemical') :: ['V  O2'] @entity26 :: ('MESH:D010100', 'Chemical') :: ['oxygen'] @entity337 :: ('MESH:D001022', 'Disease') :: ['incompetence'] @entity1576 :: ('MESH:D012131', 'Disease') :: ['respiratory compensation point', 'RCP'] @entity880 :: ('MESH:D019344', 'Chemical') :: ['lactate']
@entity1 :: (9606,Species) :: ['patients']
