Type 2 & other diabetes

Exercise Metabolic Flexibility in Type 2 Diabetes Treated With Empagliflozin: An Exploratory Analysis of the Randomised Trial EMPA ‐ HEART

Diabetes Obes MetabPublished Secondary analysis of the EMPA-HEART randomised trial

Authors' conclusion

Empagliflozin treatment is associated with enhanced FATox during low-to-moderate intensity exercise with unchanged substrate oxidation at rest and at high-intensity exercise. This effect, if confirmed, has the potential to produce an improvement of exercise capacity in patients with T2D.

Study context

Population
Patients with T2D undergoing cardiopulmonary exercise tests (CPETs) before and after 6 months of randomised therapy
Participants
44 patients
Comparison
Empagliflozin vs sitagliptin for 6 months
  • Empagliflozinn = 22
  • Sitagliptinn = 22reference
Methodological detailspre-specified exploratory analysis
  • Pre-specified exploratory analysis

Primary result

As reported in the abstract

Substrate oxidation during low-to-moderate intensity exercise (40% V̇O2max) · 6 months

FATox increased with empagliflozin only

+32 [5/65]%

p = 0.02

CHOox decreased with empagliflozin only

−30 [−45/−1]%

p = 0.04

Further findings

OutcomeEmpagliflozinSitagliptinP value
MFO · 6 months+0.66 (interval 0/1.31) mg/min/kg fat-free mass−0.59 (interval −1.49/0.31) mg/min/kg fat-free massP = 0.0249
FATmax · 6 months+5 (interval 2/8) % V̇O2max0 (interval −4/3) % V̇O2maxP = 0.0433
Plasma β(OH)B · 6 months+51 (interval 21/81) μmol/L— not stated in the abstract

— not stated in the abstract

Plasma β(OH)B — β(OH)B increase with empagliflozin (p = 0.012); correlated with maximal fat oxidation (MFO) and FATmax
p < 0.05

FATox improvement vs change in peak V̇O2 (whole population)

Improvements in FATox correlated with changes in cardiopulmonary fitness
P < 0.01

Original publication

Exercise Metabolic Flexibility in Type 2 Diabetes Treated With Empagliflozin: An Exploratory Analysis of the Randomised Trial EMPA ‐ HEART. Diabetes Obes Metab. Published 31 March 2026. doi:10.1111/dom.70727

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