I tried running 5 km every day for a week (after 8 months off) but it all went wrong

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Anyone I’ve met will know I’ve ran an ultra marathon, cycled 200 miles in a day, and finished the ToughGuy obstacle course twice. So, when given the opportunity to write about some fitness technology (and tell thousands more people about my achievements) I positively jumped at the chance.

Unfortunately, when I tell people about my sporting achievements, it tends to be received with mild confusion, as I no longer have the physique of an athlete. Since 2019, I’ve finished more pies and pints than kilometers ran. I got round the TCS London Marathon last year, but it was quite a few days until I could walk properly again. Time is a cruel mistress.

So, like many others in January, I am determined this time, more than ever, to 100% commit to (thinking about, maybe) getting really fit again. I’m also doing the TCS London Marathon again this year, and I’d like it to hurt a little less. Running five kilometers every day for a week – a theoretically simple challenge for a marathon runner – will kickstart my motivation to train in 2025 and cross that finish line in better shape, with a faster time.

Me finishing an ultra in 2019 vs finishing a cocktail in 2024 (Image credit: Future)

Day 1: Everything is broken

James' first run stats

(Image credit: Future)

When I was asked if I would like to write something for TechRadar’s Get Fit for ’25 week, I was more interested in getting some extrinsic motivation to kickstart getting fit again rather than using a gadget. I charged my ancient, no-longer-supported Series 1 Apple watch for the first time in five years but predictably, it didn’t turn on. So, I dug out my slightly-less-ancient Wahoo Tickr, which dutifully lit up and synced to my phone.

Surprisingly my heart rate was listed as 190bpm with a 225bpm maximum, an almost impossibly high number. I used to track my heart rate to monitor my overall fitness and help me train in specific heart rate zones. Unfortunately, during the run it became clear that the heart rate monitor was no longer working.

An image showing the heart rate and elevation during James' run

My 5km time may be slow but there is 100m elevation on this route. (Image credit: Future)

If I do exercise, I usually use Strava to track my routes for distance and time rather than my fitness. It’s also a nice to reconnect with my old sporting pals. For this run, I used the map feature to find a nice five kilometer route near me and set off.

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