WHOOP STRAP 4.0

Included with subscription from £30, whoop.com

Training readiness is bread and butter for Whoop’s screenless, wrist-worn bands. You get two insights – HRV score and a Day Strain score – to inform your training decisions, along with strain coach guidance that recommends a daily exertion target based on your recovery. Where Whoop really excels, though, are the weekly and monthly performance assessment charts that provide a helicopter view of the lifestyle decisions that influence your performance and ‘readiness’. The latest range of 4.0 sensors pack upgraded, accuracy-boosting tech – including four times the number of photodiodes on the sensor – plus five LEDs that use green, red and infrared light. They can also now be worn in specially made compression tops, leggings and boxers.