Hello Pepita,
Although each person is a world I tell you a little as I do, although then you will obviously have to find the guideline that best suits you.
When you talk about slow and basal insulin, I don't know exactly what you mean.For your firm I see that you have Lantus (basal) and apidra (ultra -grape) and you are not slow anywhere so I will rely on this.
According to my experience, I usually do not usually lower the basal (Lantus) unless I will be skiing more than 3 days than then under one unit every two days assuming it needs it.For a weekend it is not worth it and I usually play with the ultra -grape (in my case novorapid).
At breakfast I do not usually modify the ultra -granted units and what I do is breakfast more than in a normal day, I add a pair of toast and a piece of fruit to the coffee with usual milk.With that I usually get well to food although sometimes I need a bar in mid -morning.If before eating I am between 80-100 I put myself at most 2 ui of ultra-grape (instead of the usual 4-5) unless I will eat more HC than normal that I then maintain the normal dose.As for dinner under a couple of ultrarapid units and I don't usually have dinner.
Although it is not the most advisable for day to day when I am skiing I try to maintain higher levels (around 150) thus I avoid hypoglycemia at all hours.
The reason I do not modify the Lantus unless it is strictly necessary is that you never know with total certainwhich is easier to play with the fast than to modify the basal.In addition I have noticed that in my case, skiing, unless it is many days in a row, it does not consume me too much so I do not need to lower much, in the case of the bike the thing changes and although the basal soil does not modify it,The ultra -graph is quite low both in breakfast and food (if I go in the morning) or at food if I go after eating.
Anyway, all this is only orientative, in the end you have to be you who, based on controls, see what your best guideline is and of course always carry HC with you.For me, the most comfortable (more than fruit and juices) are the bars and glucose gels of the decathlon, many HC in little weight, and always carry out if you get lost, you do not find where to eat ...
I hope it serves you, if you have any questions, you know, ask and above all ... Keep skiing and enjoy what is left of the season!