October Prime Day weights deal: Build upper body muscle with 15% off the NordicTrack adjustable dumbbell

As a former tech writer, it should be no surprise that I enjoy smart gadgets, particularly those which do something useful, like record workouts or make exercising with weights a bit less of a hassle. 

That's why I was particularly excited to see NordicTrack's iSelect adjustable dumbbells on sale at Amazon for almost $65 less for October Prime Day. These weights are the perfect blend of my interests; exercise and tech. 

Like many of the best adjustable dumbbells, they have an impressive range, moving from 5lbs to 50lbs in 5lb increments, but instead of fiddling around on the floor to manually adjust the weights, all you need is a single voice command to Amazon's Alexa. 

The dumbbells automatically adjust to your chosen weight, so you can get straight on with your workout. This is ideal for when you only have a few seconds between moves or want to quickly switch between single-muscle isolation exercises and multi-muscle compound exercises like dumbbell swings. 

It's not often we see big discounts on NordicTrack's voice-controlled dumbbells, so check out the full deal below to save 15% right now. 

• Check out all the US Amazon Prime Day savings
• Find the biggest savings on Amazon UK

Amazon Prime Early Access NordicTrack iSelect Adjustable Dumbbells deal

NordicTrack iSelect Adjustable Dumbbells | Was $429, now $364.65 at Amazon
Focus on your workouts and let Alexa do the heavy lifting. You can quickly adjust the load with a single voice command in 5lb increments up to 50lbs per dumbbell. The durable steel dumbbells come in a storage tray and have a square design to stop them rolling away between exercises. Plus, you get a 30-day subscription to the iFit workout app. 
These premium weights were only released earlier this year, so don't miss out on this rare 15% discount on the muscle-building equipment before the sale ends. 

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Having spent the past few years training with manually adjustable dumbbells, when I'm in the middle of a high-intensity workout with only 20 or 30 seconds between moves, it's often a struggle to get the weights changed in time. 

While you can find adjustable dumbbells with quick adjustment mechanisms, the iSelect make the whole process even more convenient, letting you focus on your training or even adjust the weight if you've gone too heavy or light on a certain move. 

Plus, they come with a 30-day subscription to the iFit virtual workout platform for on-demand strength training classes. And the storage tray has an integrated tablet holder so you have somewhere easy to place your phone while streaming a workout. 

They usually retail for around the same price as the Bowflex SelectTech 552i, which also have a storage tray, easy-to-use adjustment mechanism, and a companion workout app. But with this NordicTrack iSelect Prime Day weights deal, you get a set of dumbbells with more features for less money. 

Fortunately, if you're not into the idea of voice-controlled weights, these aren't your only option. There are plenty of dumbbells on sale throughout the year if you're hoping to build muscle without breaking the bank. 

To get the most from your training, you also need to keep your protein levels topped up to ensure your muscles can repair and recover. The best protein powders for weight loss help you build lean muscle and even come in vegan-friendly editions.