type 2 diabetes -vs- short duration high intensity training……

“This study investigated effects of high-intensity aerobic interval training on….Hemoglobin type A1C, insulin resistance….blood pressure, and blood lipid profile among persons with Type 2 diabetes.”

“38 individuals with Type 2 diabetes completed 12 weeks of supervised training. high-intensity aerobic interval training consisted of 4 × 4 minutes of walking or running uphill at 85–95% of maximal heart rate….”
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“…..a reduction in HbA1c by −0.58% points (from 7.78 to 7.20%) was found in high-intensity aerobic interval training.”
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“These improvements were significant different from Moderate intensity training.”
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“High-intensity aerobic interval training is an effective exercise strategy to improve aerobic fitness and reduce risk factors associated with Type 2 diabetes.
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E.M.Støa, et al
High-intensity aerobic interval training improves aerobic fitness and HbA1c among persons diagnosed with type 2 diabetes
European Journal of Applied Physiology — Volume 117 #3 — March 2017 — page 455