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  • Black Diamond - Forearm Trainer -

Black Diamond Forearm Trainer

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88 Reviews


Get stronger with the Black Diamond Forearm Trainer.

Though Black Diamond's Forearm Trainer looks like a dog chew toy, it works surprisingly well at giving you a good forearm pump when you can't go climbing. Stash the Forearm Trainer in your desk at work or at home. Keep your arm strength up by squeezing it with each hand until you have good Coke bottle forearms, and you can barely type on your keyboard.
  • Item #BLD1021

Tech Specs

Manufacturer Warranty
1 year

Tech Specs

  • Reviews
  • Q & A

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Donut in disguise!

  • Familiarity: I've used it several times

Really great to play with in the office and around town when you have to keep your hands busy. And really works the forearms a lot more than I thought it would. Only thing I'd recommend is that it's hard to keep it away from the dog.

Great fidget tool

  • Familiarity: I've put it through the wringer

This is a great thing to have around the office. I like being able to squeeze this doughnut training through the off season to get that next climb ready to crush.

Great Product. Owned since 1995.

  • Familiarity: I've put it through the wringer

I have used this "doughnut" for several years and it works wonders for my grip strength. When I went searching for stronger or more difficult ones I found sets of three. There were several complaints about the harder ones breaking after a few months or weeks. The way to overcome this problem is to use this one but use it with a lot more reps. The price is right and you don't need a pile of these things anyway, so save your money.

Great for recovery

  • Familiarity: I've put it through the wringer

My left arm had lost some grip following an injury, got this to put some work on it and it really helped. Now the only problem is keeping my kids from stealing it!

Keep one at your desk!

    I got one of these to keep me from fidgeting too much during a long day at the office. Love it! You definitely need to use it for a while to feel that arm pump. It would be awesome if they made one that was slightly stiffer.

    5 dollar piece of rubber

    • Familiarity: I've put it through the wringer

    No suprises with this product- you get what you pay for. It's simple, durable, and you can take it anywhere. I do wish it had more resistance, but for 5 dollars it's hard to complain.

    It works

    • Familiarity: I've used it several times

    It's cheap and it will get you a good forearm pump. Perfect for the office. I've found that it helps to squeeze it on the hike in to a climb to have a little extra blood in the forearms before starting your climb.

    Lives in my car.

    • Familiarity: I've used it several times

    This guy lives in my car. I spend a lot of time on the road and therefore have plenty of time to work-out my forearms. I do recommend looking up forearm specific training programs for how to use a forearm/grip trainer as just aimlessly squeezing one of these isn't going to do what you hope for... except for maybe relieve stress.

    One thing to keep in mind, is always make sure to do oppositional workouts too.

    BD Forearm Trainer, take it everywhere

    • Familiarity: I've used it several times

    This thing is super simple, a small rubber donut that you squeeze. After using it for a few days it seems really durable, and I doubt it will lose its shape anytime soon (though it's cheap enough that if it does I'd buy another). I use it to keep up my hand strength for climbing, to remind me to use my rock rings when I'm home, and to motivate me to get up into the canyon. I bought 2, one for my house and one for my schoolbag (to daydream at the canyon out the window while my professor spews some nonsense about the weight load distribution of a metal oval ;). I could also see it being useful for loosening up hands after a long bike ride.

    Only reason I gave it 4 stars is because I'd like to see different resistance amounts, but this one is perfectly fine for all around use. I'm already coming up with new exercises like only using 2 fingers to squeeze it, using your thumb, quick and slow squeezes, holding the squeeze, etc. (I'm using it right now as I type, might be good for carpal tunnel? definitely gonna be useful after hours of video editing)

    BD Forearm Trainer, take it everywhere


    • Familiarity: I've put it through the wringer

    I have one at work at my desk, and one at home. It's not a replacement for the gym, or time well spent on the rock. But it's a kind reminder of places I'd rather be, and it gets you warmed up.

    Give your mouse a break

    • Familiarity: I've put it through the wringer

    This wonderful device lives at my desk and does a fine job of keeping my hands & wrists limber throughout a typically numbing day at the keyboard.

    Will be a great addition to my non-beer hand, post biking to help unwind & relax the hands.


      I bought this item a while back and I think it's worth the money. The only reason I gave it four stars is because for me it makes my palm sore but it's not a big deal. I would definitely recommend this product.

      Train all day.

      • Familiarity: I've put it through the wringer

      Great little tool to keep those arms and your grip tip top when you're not hanging on your next problem.

      I keep one at work for in between typing; and one at home for when vegging out to movies.

      Train all day.

      Great for the price

      • Familiarity: I've put it through the wringer

      Great little thing to have while you sit at your desk or are stuck in traffic. Mine started to split on the inner edge after a few months and compromised the integrity of the ring. For the price it's not a big deal though. Get one!

      I saw on the other site given by Matthew...

      I saw on the other site given by Matthew the resistance weight on the three in the set but they are all different colors. Does anyone know about what it is for this blue one? or at how hard it is?

      Joey, The blue is the middle resistance. I can't remember the resistance, but I want to say somwhere around 7lbs. It is fairly stiff, while providing rather "light" resistance it will work your forarms and fingers.

      Joey, I have the blue one and it has about 10-15lbs of resistance. I'd recommend more resistance if you climb very much. I'm new to the sport but have already gone to using my "blue" forearm trainer for several hours before my forearms get tired...hope that helps