








🔥 Wave Your Way to Elite Fitness ⚡
The Gronk Fitness Inertia Wave Edition is a lightweight, durable, and portable battle rope alternative designed for high-intensity full-body workouts. Endorsed by Rob Gronkowski, it delivers superior calorie burn through a unique blend of MetCon, HIIT, and aerobic training. Built with military-grade materials to withstand up to 3600 lbs of torque, it includes a versatile anchor system for workouts anywhere, making it perfect for professionals seeking efficient, space-saving fitness solutions.








| Brand | Gronk Fitness |
| Material | Natural Rubber |
| Color | Blue |
| Item Weight | 3 Pounds |
| Included Components | Anchoring system |
| Special Feature | Lightweight |
| Model Name | Inertia Wave |
| Tension Level | Heavy |
| Number of Resistance Levels | 1 |
| Manufacturer | Gronk Fitness |
| UPC | 618564965576 |
| Item Package Dimensions L x W x H | 15.2 x 13.35 x 3.5 inches |
| Package Weight | 1.36 Kilograms |
| Item Dimensions LxWxH | 114 x 1.5 x 1.5 inches |
| Brand Name | Gronk Fitness |
| Number of Items | 1 |
| Size | 1 Pack |
| Handle Material | Rubber |
| Grip Material | Rubber |
G**L
Much better than battle rope
Don't battle ropes look easy? I thought so. They aren't. They're heavy (which is the point) and take a lot of work to achieve that effortless "wave movement." Not to mention I don't have the space for one and had to grab it 1/4 of the way down, leaving a bunch of excess trailing behind me. I should clarify, I'm a mid-50s female who isn't in the best of shape, though I try to stay as active as I can. I don't see ever being in good enough shape to make the battle rope a viable option.Enter the Inertia Wave. This I could do immediately, but don't let easy fool you. Less than a minute of proper use takes my breath away. When I saw "proper use," I mean moving double time with correct form (there are several YouTube videos that are very helpful). Just swinging idly like a jump rope won't do much, so perhaps people who say it's only a gimmick are using it this way. It also makes a difference where you anchor it -- at first I tried one of those straps that go around a door (around my washing machine in the basement). This allowed too much play in the bands, so I switched to the foot pegs on my 100-pound stationary bike. This helped immensely in keeping the movement controlled and rigid, and that's where I felt the cardio benefit.As far as portability, these win hands down over a battle rope. It's also quieter and I have space to spare to use the full length, as intended.I can't comment on long-term results as I've only just gotten it set up, but just from the fact it's so easy to pick up even for a quick minute or two means I'm more likely to stick with it.If any of this sounds good to you, don't waste your money on a battle rope. You will almost certainly be disappointed. This is a far superior alternative.
L**A
Beach-Approved Ab Workout
My trainer recommended these, and I love to hate them - or maybe I hate to love them. Either way, these were an easy addition to my workout that took things to the next level. Like most women, my core is where I struggle the most, and living in Florida I need to be bikini-ready when the beach calls my name. There is no doubt that these will make an enormous difference in my fitness routine. Plus, these have an unexpected bonus - they’re fun as hell after a stressful day at the office. (My therapist approves.)These workout ropes are a quick way to ramp up your workout with an affordable and high-quality set that actually performs. The anchor kit is secure and easy to tote with you on the go, which is a must since we stay on the road a lot.Despite what I may say during my workouts, I am so glad we invested in these. In just two weeks, I already see a huge difference!
A**R
Actually Watch the Videos
Some reviewers are clearly not using these correctly. I have had mine for two years and have been using it for a full year for my 2x/week fitness class on asphalt and tile. They are still going strong, I store them in a bag.I am a Strongman competitor and if you feel like you are "fit" and not getting a workout with these then you likely aren't putting enough tension on them ( should be no slack at all) and aren't flicking your wrists correctly (you don't use your entire arm) or aren't engaging your core while using them. Most of my fitness clients can't do more than a minute non-stop. Its great cardio conditioning and they like the versatility of the different ways they can use it.Easy to pack and go, easy to set up, etc. Actually watch the videos, use the right tension and motion and this is a great workout.
R**R
Happy with Customer Suport
First of all, I purchased my Inertia Wave off Amazon, not directly from the company. I had some basic set up questions and after getting on the IW website it was suggested that I text any questions to a provided phone number. This was this past Saturday morning, and within about 30 minutes I went back and forth many many times with someone who was very informative and answered all my questions. I later found out that I was corresponding with the owner/developer, Dave Parise! He sent me links to their instructional videos and went out of his way to make sure I was a satisfied customer. Thank you Dave!
J**E
Go for it!
IDK why Amazon thinks I should mention thickness and versatility, but ok. It’s as thick as the Inertia Wave should be. Oh, and it’s very versatile.But seriously, I love these. I use them with my trainer and decided when I was fleshing out my home gym (during Covid when it’s impossible to get a lot of exercise equipment) that I wanted this. My partner put some hooks in the wall and I attached them and went.It’s good for arms, core, and some conditioning. I like to do it as a HIIT exercise.But even more than that, it’s fun! It’s like a battle rope, but better. Go for it!
B**.
Nice Alternative to the Battle Rope
Battle ropes are heavier and more difficult to use but are good. I would say these work much better for someone who is not muscle bound, or someone who is younger or older. These are very light weight and you control the tension with how far back you stand. Youtube has some great workouts with this, just follow the instructions for setting this up so it works the way it's suppose to. I am very happy with it and stoped using my battle rope, I would rather use this.
R**E
The quality is fantastic
I haven’t hooked it up and used it yet but the quality of the cords is really nice and I am looking forward to getting a good workout
L**I
After 1.5 years, rubber cracking
I bought this item 1.5 years ago and not used in the last year but kept in a fabric bag on a shelf in my closet. Yesterday I went in and got them out to use and all the rubber had age cracks in them. I called the company and they blew me off saying that they should not crack and that sorry but they are out of warranty. Terrible company and customer service.
Trustpilot
3 weeks ago
2 months ago