Luke Zocchi is the trainer responsible for keeping Chris Hemsworth in superhero shape. And, if you've ever seen any of the Thor films, it's clear he's very good at his job. He's also a leading trainer for Centr , Hemsworth's venture into the world of the best fitness apps .
The app recently launched a 28-day arm workout challenge, with Zocchi leading the first workout – a six-minute session that targets the biceps with just a couple of dumbbells. So, as TechRadar's resident fitness guinea pig, I decided to take it for a spin. "I'm going to be using the Smart Stack [Centr's new adjustable dumbbells, which are reduced in the Amazon Prime Day sale ] but you can just use a normal set," Zocchi says.
Because they allow you to change their weight to suit the exercise you're doing, adjustable dumbbells are a brilliantly versatile tool for sans-gym strength training. But for this workout, I thought I would be able to complete it with a single low-tech set of 30lb fixed weight dumbbells. So I scooped them up and set to work.
Centr Smart Stack 50 Adjustable Dumbbell: was $249 now $149 at Amazon With a minimal footprint and 10 adjustable weight settings between 5lb and 50lb, the Centr Smart Stack 50 is a fantastic tool for building strength and muscle at home. You can buy one for $149 or a pair for $299. Both options also come with a complimentary three-month digital membership to Chris Hemsworth's fitness app, Centr, to sweeten the deal.
Dual dumbbell biceps curl x30 seconds Rest for .
