About Trisomi

Trisomi is about running and staying strong as the years add up. It is written for people in their fifties, sixties and beyond who want to start running, keep running, or simply stay active and steady as they get older.

Who writes it

Hi, I am Sienna. I have been active in sport for most of my life. When I was younger I swam and ran a great deal, trained for marathons and triathlons, and spent plenty of weekends on the road and mountain bikes in the hills near home.

These days my running is steadier and my interest has shifted. I am less concerned with racing and more interested in how people keep moving well for the long run, especially once the body starts asking for a little more care. I read widely on running and fitness for older adults, and I write up the guidance that actually holds up, in plain language.

What you will find here

Practical, honest help on running and general fitness after fifty: how to start sensibly, how to train around an older body, how to look after your balance and strength, and how to stay consistent when progress is slower than it used to be. No hype, no miracle fixes, and no pretending that fifty is the same as twenty-five.

Trisomi does not sell coaching, programmes, or products. It is simply a place to find trustworthy, age-appropriate information. Everything here is general information rather than medical advice, so if something hurts or you have a health condition, please check with your GP before you start.