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The relationship between the onset of sweating (OS) and sweat lactate threshold (sLT) assessed using a novel sweat lactate sensor remains unclear. We aimed to investigate the implications of the OS on the sLT. Forty healthy men performed an incremental cycling test. We monitored the sweat lactate, blood lactate, and local sweating rates to determine the sLT, blood LT (bLT), and OS. We defined participants with the OS during the warm-up just before the incremental test as the early perspiration (EP) group and the others as the regular perspiration (RP) group. Pearson’s correlation coefficient analysis revealed that the OS was poorly correlated with the sLT, particularly in the EP group (EP group, r = 0.12; RP group, r = 0.56). Conversely, even in the EP group, the sLT was strongly correlated with the bLT (r = 0.74); this was also the case in the RP group (r = 0.61). Bland-Altman plots showed no bias between the mean sLT and bLT (mean difference: 19.3 s). Finally, in five cases with a later OS than bLT, the sLT tended to deviate from the bLT (mean difference, 106.8 s). The sLT is a noninvasive and continuous alternative to the bLT, independent of an early OS, although a late OS may negatively affect the sLT.

\"The book provides readers with a thorough grounding in physical activity assessment from a lifecourse perspective and assesses current methods of measurement, including comparison studies, criterion methods, subjective assessment methods and physical activity monitors. It then goes on to offer guidance on the optimal measurement techniques of physical activity across the lifecourse, suggesting how data should be collected, analysed and quantified in light of modern technology and global connectivity, and what these methods mean for physical activity guidelines and interventions, and public health outcomes\"-- Provided by publisher.

Thoroughly revised and updated for today's clinicians, Wasserman Whipp's Principles of Exercise Testing and Interpretation, Sixth Edition, provides a comprehensive, practical overview of cardiopulmonary exercise testing (CPET) ideally suited for pulmonologists, cardiologists, anesthesiologists, and others with an interest in clinical exercise testing. Written by authors who are uniquely positioned to convey relevant aspects of research and apply them to clinical contexts, this volume offers in-depth coverage of essential information for conducting CPET, or for utilizing data from this discipline in clinical practice or research.

Purpose/background Prehabilitation aims to improve physical condition in the preoperative period and, therefore, decrease the loss of cardiopulmonary capacity postoperatively, with the aim of reducing complications and promoting an early recovery. This study aims to evaluate the impact of home-based prehabilitation on the physical condition of patients treated surgically for colorectal cancer. Methods A prospective and randomized clinical study was conducted on 60 patients during two periods from October 2018 to February 2019 and from September 2019 to September 2020, in a single university hospital. Patients were randomized into two study groups (30 per group): prehabilitation vs. standard care. Changes in physical condition, measured at diagnosis, the day before surgery, and at 6–8 weeks after surgery using the cardiopulmonary exercise testing (CPET) and the 6-minute walk test (6MWT) were evaluated. Results Prehabilitation reduced postoperative complications (17.4% vs. 33.3%, p = 0.22) and hospital stay (5.74 vs. 6.67 days, p = 0.30). 6MWT showed a significant improvement in the prehabilitation group (+78.9 m). Six weeks after surgery, prehabilitation showed a significant improvement in the 6MWT (+68.9 m vs. −27.2 m, p = 0.01). Significant differences were also observed in the ergospirometry between the diagnosis and postoperative study (+0.79 METs vs. −0.84 METs, p = 0.001). A strong correlation was observed between CPET and 6MWT (0.767 ( p < 0.001)). Conclusion Home prehabilitation achieved lower overall postoperative complications than standard care and reached significant improvements in 6MWT and CET. A strong correlation was observed between CET and 6MWT, which allows validation of 6MWT as a valid and reliable measure of functional exercise capacity in colorectal patients when other, more specific and expensive tests are not available. Trial registration Registered in ClinicalTrials.gov in August 2018 with registration number https://clinicaltrials.gov/study/NCT03618329?cond=Prehabilitation%20cancer&term=arroyo&distance=50&rank=1  (NCT03618329). Initial results published in Supportive Care in Cancer: Effect of home-based prehabilitation in an enhanced recovery after surgery program for patients undergoing colorectal cancer surgery during the COVID-19 pandemic. DOI: https://doi.org/10.1007/s00520-021-06343-1 .

The stress test is key to the clinical evaluation and management of patients with known or potential cardiovascular disease.By measuring the heart's ability to respond to external stress, it can provide vital insights into the general physical condition of patients, highlighting abnormalities in blood flow, risk of coronary artery disease, and.

The literature review suggested that the Singla-Richa modified shuttle walk test (SWTSR) was equally reliable and valid when compared to the conventiol shuttle walk test. A comparison of SWTSR with the six-minute walk test (6MWT), which is considered the gold standard in walk tests, allowed us to evaluate the SWTSR and determine its validity and reliability as an altertive or supplement to the 6MWT. The objective of this study was to determine the correlation between the distances walked during a SWTSRand the 6MWT in healthy, normal adults. The study recruited 42 healthy normal adults who underwent 6MWT and SWTSR on the same day. The correlation was assessed by Pearson’s correlation coefficient, and agreement between the tests was assessed using a Bland-Altman plot. Additiolly, the acceptability of the modified test in comparison to the 6MWT was assessed by the Likert scale. The distances walked (mean ± standard deviation) in the 6MWT and SWTSR were 693.8±58.3 and 951.4±139.7 m, respectively (Pearson’s correlation coefficient of 0.918). The distance covered by the study participants in the 6MWT and SWTSR showed a strong correlation with spirometry results. The SWTSR induced a greater physiological response compared to the 6MWT. The acceptability of the SWTSR was comparable to that of the 6MWT. The distance walked in the SWTSRshows a strong positive correlation with the 6MWT and has comparable acceptability with the 6MWT. The SWTSR may provide a better index of the patient’s ability for his activities of daily living and may be a better measure for studying exercise tolerance than the 6MWT in certain clinical settings.

Background Transcatheter tricuspid valve intervention (TTVI) has shown promising results with persistent reduction of tricuspid regurgitation (TR) and improvements in functional class and quality of life (QOL). Objectives To analyze the impact of TTVI on maximal and submaximal exercise capacity (SEC). Methods Constant work-rate exercise-time (CWRET) testing reflects SEC, which is more likely to be relevant for daily life activities and provides more differentiated physiological insight into the nature of exercise intolerance. Thus, 30 patients undergoing TTVI (21 direct annuloplasty and 9 edge-to-edge repair) received cardiopulmonary exercise testing (CPET) and CWRET (at 75% of maximum work rate in the initial CPET) before and 3 months after TTVI. Results Patients’ age was 80.5 [74.8–82.3] years and 53.3% were female. TR reduction ≥ 2 grades was achieved in 93.3% (TR grade ≤ moderate in 83.3%). Echocardiography revealed improved right ventricular (RV) characteristics with decreased RV basal diameter (47.0 mm [43.0–54.3] vs. 41.5 mm [36.8–48.0]; p  < 0.001) and decreased inferior caval vein diameter. CWRET testing showed a significantly improved SEC (246.5 s [153.8–416.8] vs. 338.5 s [238.8–611.8] p  = 0.001). Maximum oxygen uptake showed a positive trend without statistically significant differences (9.9 ml/min/kg [8.6–12.4] vs. 11.7 ml/min/kg [9.7–13.3]; p  = 0.31). In contrast to the six-minute-walking distance (6MWD), SEC correlated moderately with effective regurgitation orifice area reduction ( r  = 0.385; p  = 0.036), increased cardiac output ( r  = 0.378; p  = 0.039), and improved QOL ( r  = 387; p  = 0.035). Conclusion Improvements in exercise capacity after TTVI mainly occur in the submaximal rather than in the maximal exercise range and correlate with hemodynamic effects and QOL. This may have a methodological impact on assessment of exercise capacity in these patients. Graphical abstract Improvements in exercise capacity mainly occur in the submaximal (Constant work-rate exercise-time, CWRET) rather than in the maximal exercise range (maximum oxygen consumption, peak V O 2 ), and correlate with reduction in tricuspid regurgitation, hemodynamic effects and QOL