Is it just old age, so MTFU?
Been like it for a while, not sure if it's the mattress, lack of core strength, too much time on the internet, age, all of the above.
Following a winter of apathy, I've got back on the bike the last few weeks and started jogging. Back muscles are really aching, where as in the past it would have been just the leg muscles smarting.
I'm thinking about some core strength stuff, anyone got any programmes?
or other advice?