Glycemic responses differ by exercise classification (i.e. aerobic, interval, resistance) in individuals with T1D, but the impact of insulin delivery modality (multiple daily injections [MDI], pump, closed loop) on these differences is unclear. Data from the Type 1 Diabetes Exercise Initiative study allowed us to compare glycemic responses by insulin delivery method. Adults (N=497) with T1D ([mean ± SD] age= 37 ± 14 years; HbA1C= 6.6 ± 0.8%) were assigned to complete six at-home sessions of aerobic, interval, or resistance exercise over 4 weeks, using study-developed instructional videos approximately 30 minutes in duration. Mean [95% CI] change in glucose during the assigned exercise was -[95% CI -22, -16], -15 [-18, -12], and -9 [-12, -7] mg/dL for aerobic, interval, and resistance exercise, respectively (P<0.001) , after adjusting for baseline glucose, insulin delivery modality, age, and sex. This pattern was similar irrespective of insulin delivery modality (Figure) .

In summary, regardless of insulin delivery modality, adults with T1D experienced the largest glucose drop for aerobic exercise followed by interval exercise and resistance exercise.


M.Riddell: Advisory Panel; Zealand Pharma A/S, Zucara Therapeutics, Consultant; Eli Lilly and Company, Jaeb Center for Health Research, Speaker's Bureau; Dexcom, Inc., Eli Lilly and Company, Novo Nordisk. P.Calhoun: None. J.R.Castle: Advisory Panel; Insulet Corporation, Novo Nordisk, Zealand Pharma A/S, Stock/Shareholder; Pacific Diabetes Technologies. R.Beck: Consultant; Diasome, Eli Lilly and Company, Insulet Corporation, Novo Nordisk, Research Support; Ascensia Diabetes Care, Beta Bionics, Inc., Bigfoot Biomedical, Inc., Dexcom, Inc., Eli Lilly and Company, Medtronic, Novo Nordisk, Roche Diabetes Care, Tandem Diabetes Care, Inc. M.R.Rickels: Advisory Panel; Sernova, Corp., Vertex Pharmaceuticals Incorporated, Zealand Pharma A/S, Consultant; L-Nutra Inc. S.R.Patton: None. C.K.Martin: Advisory Panel; Wondr Health, Board Member; EHE Health, Other Relationship; ABGIL, ABGIL, Academy of Nutrition and Dietetics. Z.Li: None. P.G.Jacobs: Other Relationship; Pacific Diabetes Technologies, Research Support; Dexcom, Inc. M.B.Gillingham: None. R.L.Gal: None. F.J.Doyle: Other Relationship; Dexcom, Inc., Insulet Corporation, Roche Diabetes Care, Stock/Shareholder; Mode AGC. M.A.Clements: Consultant; Glooko, Inc., Research Support; Abbott Diabetes, Dexcom, Inc.

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