GlucoseGo
Is now a good time to exercise? Tell us three things - your trend arrow, your glucose and how long you plan to move - and you will see your chance of going low.
GlucoseGo
Is now a good time to exercise?
- 1Trend arrow
- 2Glucose
- 3Time
1 · Your trend arrow
Which way is your sensor arrow pointing? It changes the whole answer, so it comes first.
Steady and rising arrows behave the same way, so they share a chart.
Glucose now
Opens when you pick your arrow
How long will you move?
Opens when you enter your glucose
Chance of going low while you exercise
Your answer appears after step 3
Start with your trend arrow. A falling arrow means your glucose will keep dropping once you start moving, so we cannot work out your risk without it.
Very low
Under 1 in 100
Unlikely, but not impossible. Keep fast carbs with you and check as usual.
Low
1 to 5 in 100
Unlikely. Check your glucose every 20 to 30 minutes.
Medium
5 to 20 in 100
There is a real chance. Have a small fast-acting carb snack first.
High
Over 20 in 100
Likely. Eat some carbs now, or wait for your glucose to rise.
The four bands and their chances come straight from the research. The research does not say how much to eat, so ask your diabetes team what is right for you.
Where this comes from
Russon et al. GlucoseGo: a simple tool to predict hypoglycaemia during exercise in type 1 diabetes. Diabetologia, 2026;69:1468-1481. doi:10.1007/s00125-026-06692-8
It works out your risk from three things: your glucose before you start, how long you will move, and which way your sensor arrow is pointing. Those three came out on top when the researchers looked at more than 16,000 real exercise sessions. This is the same model used in the EXTOD app.
A few things worth knowing. It was built from data on people aged 12 and over. It stops at 60 minutes because the model gets less reliable for longer sessions. And it tells you about going low during your session - you may still need to watch for a low in the hours afterwards. The chances are averages across everyone in the research, so your own body may respond differently - even a very low chance is not a promise that you will not go low.
It is here to help you learn - it is not medical advice. Always talk to your diabetes team before you change your insulin.