Writers who can write about recent fitness trackers

Num. of articles: 4
Words per article: tbv
Blog/website url: healthhiker.com
Information for the blog/website: heath website
Topic: fitness trackers, health bands (call them what you will!)
Tone: Informal/Casual
Outline & Structure: I need writers to create articles on fitness trackers - reviews, comparisons, technology - if you know something about fitness trackers, how they work, their apps etc. etc. and you can write engaging/interesting articles, then please get in touch.

All experiences levels welcome - just need samples of work to see you can write.

Anyone who's already on the books welcome to get in touch too :)
Extensive research needed: yes
Extra notes: