Blimey - my throwaway remark about arms and cycling has generated more interest than I expected, or it deserved!
Here is a map showing what the hills immediately round here are like ...
The single chevron climbs indicated are 14-19%. The double chevron climbs are 20+%. It takes a lot of effort to get up them. I pull hard on the bars with a tensed back when putting those efforts in to give my legs something to push against. Those rides make my leg muscles bigger and stronger. They make my arm muscles bigger and stronger. Trust me! I can pick up heavy objects more easily. I can twist the tops off tight jars more easily.
My biceps are still pretty puny by strongman standards. I was referring more to my forearms which have
definitely got bigger. Is that due to body fat? No - I have lost lots of weight and have loose skin on my arms as a result. My arms were quite big before I lost the weight but that was due to flab not muscle.
I know the size of my arms with low body fat AND small muscles, because that is what they were like when I left university. I weighed about 68 kg at that time despite being 1.86 m tall and a medium build (6' 1", 10 st 10 lbs). I was skinnier than Chris Froome!
Here is a 3.5 inch roll of Sellotape ...
When I left university, I could slide one of those over my hand, up over my forearm, past the elbow, over my bicep and have it nestling in my armpit!
When I developed fat arms, I could get the roll almost as far as my elbow, but no further.
Now, my arms are getting lean again and the veins and connective tissue are starting to stand out.
The flab has gone. So, how far would the Sellotape go now? I know the answer before even trying it because I know that my arms are a lot bigger than they were when I was skinny ...
The roll of tape will not go as far as it would when I had fat arms, and that certainly is not stuck up in my armpit! The thing blocking its path is a muscle. It isn't flab. It isn't fluid in the tissues. I don't do any exercise other than cycling and walking, and I am sure that it isn't walking that made my arm muscles bigger! I don't even carry my shopping using my arms - I carry that in a rucksack on my back.
Anyway, I think I've made my point ...