Whoop

The whoop hardware is a fitness hardware and it comes at just 180$. It is very lightweight and waterproof and offers you an accurate understanding of your body.

It offers

Professional quality analysis of Recovery, Strain and Sleep delivered to you daily via mobile and desktop apps. You will also receive weekly and monthly trend reports.

This is one great fitness tool for all athletes who are looking to grow and improve their skills. You can also join the community where there are other people athletes that will share their experience.