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Exercise and Type 1 Diabetes

How exercise affects glucose

• Aerobic → tends to lower BGL (risk of hypos).
• Anaerobic/sprint → may raise BGL short term.
• Effects can last hours.

Before activity

• Check BGL; if low, treat first.
• Have glucose on hand.
• Adjust insulin if planned strenuous exercise.

During

• Monitor every 30–60 min for longer sessions.
• Use CGM alerts if available.
• Drink water regularly.

After

• Watch for delayed hypos (overnight).
• Consider reduced basal or extra carbs if needed.