Strain and recovery wearable, the WHOOP strap, recently announced series 3 funding of $25million.
WHOOP (Review) has got some serious heavy-weights on their board including ex-PUMA and ex-UBER execs. Not to mention significant levels of usage amongst high-profile NBA and NFL players.
Source: whoop.com and sporttechie
Resources: WHOOP manual
Detailed review: below
WHOOP 5.0 Review: Accuracy Tests, Strain Science & Is MG Worth the Subscription for Athletes? (Nov 2025)
Last Updated on 8 October 2026 by tfk the5krunner
Small things I always use
Watches and sensors
On the bike
Home and indoor training
- NPE Runn: Makes my basic treadmill smart, sending more accurate speed and distance to my watch and Zwift. I use it.
- Google Wifi: Keeps Zwift connected in my pain cave. I use it.
- Apple TV 4K: Zwift on the big screen. I use two.
- Google Nest Doorbell (wired, 2nd gen): My video doorbell, running in both Google Home and Apple Home. I use it.
Health, recovery and sleep
- FreeStyle Libre 3 Plus: Shows how my blood sugar responds to diet.
- hDrop: Measures my sweat loss in summer and indoors.
- Fourth Frontier Zone: Checks my heart under load in hard sessions.
- Kineon MOVE+: Red and infrared light for sore knees, Achilles and other joints after hard training. I use it.
- Oura Ring 5: My partner’s recovery tracker of choice.
- Eight Sleep: A cooling mattress cover my partner and I use nightly.
Reader-Powered Content

This content is not sponsored. It’s mostly me behind the labour of love, which is this site, and I appreciate everyone who supports it.
Support the site: Follow (free, fewer ads) · Subscribe (paid, ad-free) · Buy Me A Coffee
Written by real people, with AI assistance. Fact-checked and verified for originality. See the Editorial Policy. FTC: Affiliate Disclosure — some links pay commission. As an Amazon Associate, I earn from qualifying purchases.
tfk is the founder and author of the5krunner, an independent endurance sports technology publication. With 20 years of hands-on testing of GPS watches and wearables, and competing in triathlons at an international age-group level, tfk provides in-depth expert analysis of fitness technology for serious athletes and endurance sport competitors. See the gear tfk uses. ID
Those people have money but neither puma or Uber do technical devices
Mr Bertone is marketing, Mr Stern headed ‘engineering’ at Uber…whatever ‘engineering’ means in the context of Uber I don’t know. App maybe?