https://www.nokia.com/phones/en_gb/nokia-5310
It's only 3cm taller, the battery will last you a week and it has no distractions, oh and it's 34 quid.
More classic Nokia options here: https://www.nokia.com/phones/en_gb/classic-phones I've had a Nokia 208 for 7 years, I take it rock climbing all the time, it's been crushed and battered countless times and dropped from 60m - battery only lasts a few days now so time to get a new one (a new battery not a new phone).
These phones are great for sports because they are so rugged and they are cheap anyway so you can forget about them and focus on what you are doing. The stick phone form factor is also better for fitting into a pocket without restricting movement - I don't always want to take it on route but sometimes forget it's in my pocket.