Whoop 4.0 Band

The band is 33 per cent smaller, so takes up less space on the wrist. The sensors have been developed so it can measure more metrics – and more accurately – like blood oxygen level and skin temperature. When combined with respiratory rate, heart rate and HRV, Whoop gives a daily medical and shows you in the report, at a glance, whether your five metrics are within your healthy range.

£30 per month