I Like Long Walks

@Mugin16 I don't know. I went the same route last Monday and I was fine. I remember that I had these back pains on November 2 too. It could have something to do with how I sleep.
Or some hormonal thing again. 😑 It would explain chest tightness and low energy too.
Either way, I have to look up those exercises for strengthening back muscles.

@CrazyMusicLover Then it is most likely not about the walk.

@Mugin16 No, wait...I'm wrong, it hurt on Monday 🤔 just not that much. Now I recalled how it started hurting after some time walking but it stopped later so I thought "It hurts because I have little physical activity so I must do this more often" I was done when I returned home but after a while I felt really good.
Yep, walking triggers it, I went to 6,5 km long walk with my brother on November 2 too.

@Stereoguy it's not that bad that I would have to take painkillers but massage would be wonderful.

@Stereoguy I took the painkiller in the end. :/ I didn't expect it would be so bad.