Jesus Christ , 48 lbs in 2 months ? ! You have done very , very well my friend . I started just over your weight 2 weeks ago and this post has really got me excited for what could be in store for me ! <| sep |> If you want a CGM and you want to play contact sports there will always be a risk that you sensor will come off , there ' s no way around it . Just choose a spot where you think it will be safeish and start from there . I don ' t know about aussie football , but the upper but is usually relatively out of harm ' s way unless you spend a lot of time on your back of course . In my experience , the two things that can mess up your sensor are sweatwater and getting caught up with your clothes , a door frame or whatever life throws at you this is at least true for the dexcom sensor since they are pretty bulky , don ' t know about the libre . To avoid the adhesive from failing just keep it as dry as possible I try to avoid completely covering it up with tape because it will make the sweat accumulation a problem and patch it as necessary opsite flexifix is great for this . To prevent it from getting caught in clothesetc , I find that placement is key , then tuck it under tight fitting clothes or an elastic band while playing the idea is that stuff should slide over it instead of knocking it off , then pray . On the plus side , as with most things in life , you ' ll get better at it as you go forward . You may not even notice what you are doing different , but small adjustments like fine placement , playstyle , etc will make it so you will have less and less problems .