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Eckstein, ML; Farinha, JB; McCarthy, O; West, DJ; Yardley, JE; Bally, L; Zueger, T; Stettler, C; Boff, W; Reischak-Oliveira, A; Riddell, MC; Zaharieva, DP; Pieber, TR; Müller, A; Birnbaumer, P; Aziz, F; Brugnara, L; Haahr, H; Zijlstra, E; Heise, T; Sourij, H; Roden, M; Hofmann, P; Bracken, RM; Pesta, D; Moser, O.
Differences in Physiological Responses to Cardiopulmonary Exercise Testing in Adults With and Without Type 1 Diabetes: A Pooled Analysis.
Diabetes Care. 2021; 44(1):240-247 Doi: 10.2337/dc20-1496
Web of Science PubMed FullText FullText_MUG

Leading authors Med Uni Graz: Eckstein Max Lennart; Moser Othmar
Co-authors Med Uni Graz: Aziz Faisal; Hofmann Peter; Müller Alexander; Pieber Thomas; Sourij Harald
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Abstract:: To investigate physiological responses to cardiopulmonary exercise (CPX) testing in adults with type 1 diabetes compared with age-, sex-, and BMI-matched control participants without type 1 diabetes. We compared results from CPX tests on a cycle ergometer in individuals with type 1 diabetes and control participants without type 1 diabetes. Parameters were peak and threshold variables of VO₂, heart rate, and power output. Differences between groups were investigated through restricted maximum likelihood modeling and post hoc tests. Differences between groups were explained by stepwise linear regressions (P < 0.05). Among 303 individuals with type 1 diabetes (age 33 [interquartile range 22; 43] years, 93 females, BMI 23.6 [22; 26] kg/m², HbA_1c 6.9% [6.2; 7.7%] [52 (44; 61) mmol/mol]), VO_2peak (32.55 [26.49; 38.72] vs. 42.67 ± 10.44 mL/kg/min), peak heart rate (179 [170; 187] vs. 184 [175; 191] beats/min), and peak power (216 [171; 253] vs. 245 [200; 300] W) were lower compared with 308 control participants without type 1 diabetes (all P < 0.001). Individuals with type 1 diabetes displayed an impaired degree and direction of the heart rate-to-performance curve compared with control participants without type 1 diabetes (0.07 [-0.75; 1.09] vs. 0.66 [-0.28; 1.45]; P < 0.001). None of the exercise physiological responses were associated with HbA_1c in individuals with type 1 diabetes. Individuals with type 1 diabetes show altered responses to CPX testing, which cannot be explained by HbA_1c. Intriguingly, the participants in our cohort were people with recent-onset type 1 diabetes; heart rate dynamics were altered during CPX testing. © 2020 by the American Diabetes Association.