Archive - Zulu Sierra

Thoughts on Tracking Data whilst Climbing Part 1

On the Quantification of Pump

Jun 11

Troubleshooting Apple Watch and External Heart Rate Monitors

The Apple Watch is a very powerful wrist-mounted personal communications device, but with that great power comes great responsibility for battery life…

Jun 10

April 2024

On Garmin and Polar chest straps

Both Garmin and Polar make chest strap heart-rate monitors. Garmin's product looks expensive, but you only ever need to buy one: it'll fail within the…

Apr 23

Inhabiting William Gibson's Modern Trilogies

I think William Gibson is best known for the Sprawl trilogy, and specifically Neuromancer. Amazingly he has written other books: the Blue Ant/Bigende…

Apr 22

Spring Julbo EVAD-1 Update

I have a couple of other posts on the EVAD-1, tl;dr is that the software is incredible, but the early hardware I had was... challenged. Four years on…

Apr 15

Brief Sennheiser Momentum Sport Data Analysis

Sennheiser released their Momentum Sport headphones in 2024-04, an interesting partnership between Polar (they who invented the chest-worn ECG) and an…

Apr 15

March 2024

Theoretical: Garmin is the better training tool

Since the Fēnix 3, Garmin's watches have been the most fully-featured tracking devices available. This isn't to say the most accurate, but, the ability…

Mar 26

January 2024

How to have better Sends with Friends

Or Intentional Skills to Climbing Improvement

Jan 28

March 2023

1000km on a Squid Gravtron

After owning a second-hand Cannondale Topstone for ~500km, I decided that the bike was cursed and sold the frame and fork. Wanting something to hold the…

Mar 6, 2023

Gravel Rides Around Seville

In 2023, I was lucky enough to spend three months in Seville (Sevilla), in Andalucia in southern Spain. I took my bike with me, a steel Squid Gravtron…

Mar 4, 2023

September 2022

My post-flight photo workflow

Since flying my first quadcopter, a Mavic Pro, I've evolved the sequence of events that between landing and having photos to share. It's the most…

Sep 1, 2022

August 2022

Sports Technology Minimalism

As I optimise for six months of digital nomadism, I’ve been reviewing a lot of my possessions: what to keep, what to sell, what to donate. Some of this…

Aug 30, 2022

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