V v long sorry but looking for advice.
I am vaguely fit but not very. Can run slowly but surely when not injured, do hiit/body conditioning a couple of times a week, lots of v long walks regularly etc. So not a beginner but not much more iyswim. About a stone overweight. Mid 40s. I like to exercise first thing in the morning before breakfast usually.
Today went for a family bike ride. DC and DH ride a lot and go quite fast. I do not usually cycle and do t love it but am trying to let my hip injury heal and also family activity. Route is very hilly and takes about 1.5-2 hours of up and downs. I hate the hills beyond all measure.
We went mid morning so I had breakfast (eggs/1 piece of toast). Not huge amount to drink. I felt fairly meh from the get go, legs achy and a bit drained. Got to one hill (one of the steeper ones but not the worst) and whilst I got to the top I felt properly faint, incredibly wobbly legs, heart was hammering and I had to get off and sit down. Took me a good 5 minutes to recover and even then still felt shaky. Carried on and about 15 mins later we stopped for a proper break where I had water and a banana. Then off I went home and was fine including a bigger hill.
So did i
A, not eat enough
B, not drink enough
C, just not fit enough to manage the hill
D, combo of all of the above
How to I improve? Do I need to do a bit more hill climbing? Other exercise which will help? Kids love the activity and I want to keep up. Plus not faint on the road obvs.