outdoor bumper plates

2022.07.31
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outdoor bumper plates

/ 35 lb. When youre working on your fitness in the scorching hot summer temperatures, your body isnt the only thing that seems like its reaching unimaginable temperatures. Warranty: 5 Years, The Rogue Competition Plates are extremely accurate, high-quality, and beautiful bumper plates. It is not embedded in the rubber during the process of vulcanization and as a result, lacks the durability of Vulcan Alpha Bumper Plates, 10 lb plates are a slightly smaller diameter to add density to the rubber compound to allow for dropping. Durometer Rating: 90 on 10-15lb plates; 85 on 25lb+ (Low-to-Medium Bounce) Our bumper plates are freakin tough as nails, bad-mama-jama weights to get you big and strong. They have a smooth hard chrome center hub with a Lu Xioajun signature embellishing the front. This will result in a slightly bouncier plate relative to some of the others. Their price-to-performance ratio is one of the strongest out there. Rogue does include raised flanges around the hub to prevent metal-on-metal contact, which certainly helps.

The 45lb plates are 2.83 thick, which falls somewhere in the middle on the spectrum of similar plates. Like other LUXIAOJUN bumper plates, these include the channel grooves for very easy handling. These plates have a very high durometer rating of 94, which is among the highest in the entire industry. Weight Tolerance: +/- 10 grams Weight System: Pounds Bounce is one of the most important factors to consider when purchasing bumper plates. Different bumper plates have different levels of durability. They can also withstand some time outside, where theyre unprotected from the elements after use. Basic bumpers and urethane bumpers are typically in the middle (85-90) for a medium bounce. You could drop both plates side by side and there would not be a noticeable difference. In the home gym, you can be confident theyll last years and withstand constant abuse thanks to how theyre constructed. Our bumper plates are crafted to withstand. Weight Options: 25lb-55lb & 10kg-25kg (also available in sets) If theres one odd thing about these plates, however, its that the 35lb variants have a highlighter-like look to them, which I dont care for. Urethane bumper plates are some of the best plates that you can buy. But, does that mean they shouldnt be taken back inside, cleaned up, and stored properly? Weight Options: 25lb-55lb & 10kg-25kg (also available in sets) In terms of warranty, these plates have a very competitive 3-year warranty on 25lb plates and a better-than-most 6-month warranty on 10-15lbs. These plates have a hooked stainless steel insert that works to increase the durability of the plate. This is one of my favorite touches of any plate, and I think it looks excellent. Price:$278 (45lb Pair) Below is a list of some of the top brands: So, there you have it my rankings of the best bumper plates to buy in 2022! I like plate trees because of their convenience, footprint, and portability (in some cases). This works really well for damage prevention and noise reduction but as a result, my urethane bumpers can be very difficult to get onto some of my bars. An interesting thing about them, however, is that the LB plates dont have the weight callout, whereas the KG plates do. Rapid change in temperature, especially when exposed repeatedly and often, can shorten the useful life of bumper plates as well as other equipment, although humidity and moisture pose more of an issue for plates and barbells. Check down below for some less expensive options. Other Fleck plates are made with standard rubber that can chip, show easy signs of wear, or crack easily when dropped on aggregate surfaces such as concrete or pavement. Bumper plates offer a few primary benefits: Bumper plates are the most versatile type of weight plate. Alpha bumper plates are made of a patented rubber compound and process that is unique to Vulcan Alpha. One disadvantage of urethane relative to rubber is that its slicker, which can make it more challenging to handle the plates. This relatively "new" workout device has revolutionized eccentric training by making it safer and Outside of Black Friday, July 4th offers some of the best deals on gym equipment of the year. These were purposely built to 445mm to limit them warping over time. I would strongly recommend checking them out if youre looking for competition bumper plates on a budget. Theyre also guaranteed to be within a +/- 1% weight tolerance, so you can rest assured youll be lifting very close to the stated weight. The contrasting white lettering provides a nice pop and the text is very legible. You have entered an incorrect email address! The Vulcan Alpha Bumper Plates were introduced in 2015 and have become very popular. For less than $10, I think this is a great add-on. Sounds like you have an awesome plate collection. These competition plates from REP have been factory tested to over 30,000 drops from 8 feet. For example, a full center hub is going to protect against warping better than a center ring. While the Rogue Fleck Plates werent designed to be used outdoors like the similar-looking Vulcan Alphas, they are less expensive. After viewing product detail pages, look here to find an easy way to navigate back to pages you are interested in. Bumper plates are made from recycled rubber, virgin rubber, or urethane. BalanceFrom Everyday Essentials Color Coded Olympic Bumper Plate Weight Plate with Steel Hub, 260 lbs Set, AMGYM Color Olympic Bumper Plate, Weights Plates, Bumper Weight Plate, Steel Insert, Strength Training, papababe Bumper Plates Sets with 7ft Olympic barbell, Change Plates 2 inch Fractional Weight Plates, 3 in 1 Multifunctional Weight Plate Rack, Iron Crush Olympic Bumper Plates Set - Virgin Rubber Weights for Strength Training - Stainless Steel Inserts, Fits 2" Barbells - Low, Dead Bounce for Safety - 10lb to 45lb - Sold in Pairs, XMark Bumper Plate Weight Plates, Bumper Weight Pairs and Sets For Olympic Lifting, Weight Plates Sets, Olympic Bumper Weight Plates, Barbell Weight Plates, 2-Inch Olympic Weight Plates, Strength Training Plates, Steelbody Olympic Rubber Bumper Weight Plate - 10 lb. If your gym is located in an area where the dropping of weights can cause a disturbance to your neighbors, the reduction of noise can be helpful. The center ring is stainless steel and it measures 50.4mm for a very snug fit. These plates are available in pounds (what I have) or in Kilograms. Sleeve Spacing: 18.275 on center. Learn from Box Owners and garage gym-ers like you. Theyre a sharp-looking plate with a simple overall aesthetic. Meet Tina Wilson and Her "Appropriate" Gym Name! They're very durable, low-bounce, and well-reviewed. If youre going to be buying bumper plates for your home gym, you need a place to store them. Bumper plates can range in specs, material, price, quality, etc which can be a challenge when narrowing down a list of potential candidates. Some plates, like the Rogue Fleck Plate, Vulcan Alphas, Fringe Sport Savage Plates, etc will have unique patterns, but they still maintain the overall color scheme. The plates have a full-zinc hub, which increases durability. Warranty: 3 Years on 25lb+ & 1-Year on 10-15lb. Theyre very well-specd, in some areas better than Rogue, and theyre very strong performers. These are designed by the world-renowned weightlifter, Lu Xiaojun, and they have several nice qualities. Alpha Bumpers make approximately 25% less noise when dropped from a height of 9 ft, based on testing with a decibel meter. If so, you may want to purchase plates more capable of withstanding abuse. Ultimately, most home gym owners will find urethane plates to be a luxury item. These plates are accurate, they look nice, and theyre durable. Weight Options: 5lb-45lb (also available in 160lb-370lb sets) Are you training for a weightlifting competition? Not only are their retail prices significantly less, but theyre often available on sale. Crumb bumper plates have the thickest profiles, followed by basic black/color bumpers, and then competition/urethane bumpers. Considering these plates used to be +/- 3%, its a welcomed change that puts them firmly in the conversation among their competition. Bumper plates come in a variety of styles based on budget, aesthetics, and most of all, performance. As such, theyre a strong contender if youre looking for fleck-style/unique plates. One of my favorite features of these plates are the channel grooves on both sides. Any bumper plate factory can make flecks in the rubber or use dye to give the appearance of flecks. They also have a relatively thin profile (2.76 on 45s), which allows for plenty of weight on the bar for most people. Material: Urethane w/ Chrome Insert This will allow for up to 590lbs of plates on a traditional barbell depending on the collar youre using. The Alphas have a durometer rating of 89 on all plates, which is high for non-competition bumper plates. Weight System: Pounds and Kilograms Not only does that help with performance and producing a lower bounce, but it also greatly reduces odor. In the home gym, this could play a critical factor in determining which plates to buy. Heavier variants carry a strong 3-year warranty. A low bounce means you wont be chasing your barbell around the gym. You will commonly see 3-5 year warranties on 25lb+ bumpers and 3 months to 1 year on 10-15lb variations. This typically includes a standard IWF (International Weightlifting Federation) color scheme.

If theres one thing youve learned in this article, its that LUXIOAJUN is selling some of the best plates for the money. / 25 lb. Vulcan is so confident in this design that they offer a 4-year warranty on 35lb+, 3 years on 25lb, and 1 year on 10-15lb variants. Just be aware that there might be some maintenance necessary afterward. These plates also have a very thin profile, which is a general benefit of competition bumper plates. Im not sure why this is the case, but the KG plates do look nicer because of that, in my opinion. Weight Tolerance: +/- 15 grams Some plates with a simple pressed insert will dislodge over time or warp sooner. While we make some of the toughest bumper plates on the market, were going to say no. In cases where you lack proper storage for your gear, bumper plates can be left outside, but the consequences must be considered. But, can they be left outside? Discover more about the small businesses partnering with Amazon and Amazons commitment to empowering them. The LUXIAOJUN Urethane Plates offer tremendous value on high-quality bumpers with excellent specs and features. The bounce between the two plates is the same. Our bumper plates can absolutely be left outside for some time. They have the lowest durometer ratings, which leads to higher bounce, and theyre not as durable as other bumper plates. The REP comp plates have a very high durometer rating of 92, which creates a very low bounce. With big markdowns, exclusive offers, and Finding space in your home gym for a full-size squat rack can be difficult. Like other competition plates, these from LUXIAOJUN are thin, accurate, and very durable. Price:$175 (45lb Pair) The Vulcan Urethane Bumper Plates were the second set of urethane plates that I added to my home gym. This might lead to the need of some extra maintenance, like cleaning and potentially repair of the metal inner ring that takes the brunt of your hard work. The Fleck "Camouflaged-Like" pattern is clearly distinct and will make these the best looking and best performing bumper plates in your gym. While theyre generally more expensive than steel plates, theres a bumper plate option for virtually every budget level. Were not necessarily going to say yes, because we would much prefer that you take the utmost care for your precious plates to prolong their usable lifetime and get the most gains out of them as possible. This includes picking the plates up from a flat position on the ground. Should your bumper plates be left outside? I prefer the American Barbell hub style from a visual perspective. Color rubber bumper plates are built the same as black bumpers, with the only difference being they offer colors.

Less vibration and wobbling. These plates are guaranteed to +/- 1% on weight accuracy and they offer a full two-year warranty on all variants, which includes 10-15lbs. These are among the most expensive plates available, but for good reason. These Fringe Sport Bumper Plates are a great choice for someone looking for quality colored bumpers at a solid price. So, its easy to say that our bumper plates can easily be used outside and withstand the toughest workouts in tough environments. Our Milspec bumper plates were specifically designed to be used by soldiers (and garage-gymmers) in some of the most inhospitable environments on earth. This makes weight identification immediate and it creates an overall nice aesthetic. These plates are extremely vibrant and aesthetically very nice-looking. Weight System: Pounds The REP Black Bumper Plates are a great budget-friendly option for basic plates with solid performance and user feedback. In my experience, the Alphas are similar to other high-end bumper plates when it comes to noise. They have a very strong warranty of 5 years. Originating in 2015, this design is fun, unique, and its still based on the IWF color scheme. Coupled with a deeply beveled edge, this makes it far easier to grip and carry these plates compared to traditional flanges. The following breaking shows a standard range on a price-per-pound basis (45lb benchmark) for bumper plates: I highly recommend bumper plates because theyre the most versatile type of weight plate. If youre concerned with noise, bumper plates are the answer. This allows for over 500lbs of weight. This means you can load more weight onto the bar relative to some other bumpers. The Rogue Competition Bumper Plates are some of the nicest overall plates on the market.

Durometer Rating: 88 (Low-to-Medium Bounce) Durometer Rating: 85 (Low-to-Medium Bounce) This is one of the best warranties in the industry for rubber bumper plates. Its true - our bumper plates have been designed and manufactured to the highest standards, with extremely durable virgin rubber and can withstand being dropped and used time and time again as you reach maximum gains. Weight Tolerance: +/- 1% Weight Options: 25lb-55lb & 10kg-25kg (also available in sets) Vulcan was one of the first companies to offer the flecked pattern on bumper plates. This increases the durability of the plates while also looking beautiful. He serves as the chief content creator with over two decades of training experience. Weight Tolerance: N/A Steel plates, on the other hand, are mainly used for powerlifting and machine-based lifting. See the FAQ section below for a breakdown of prices for different styles of bumper plates.

The best thing about this plate storage system is that it includes 12 long posts. Regular bumper plates are made to be dropped on rubber flooring or wood platforms. The Vulcan Alpha Bumper Plates are very unique in terms of their aesthetic and their function.

Meet A Hard Working Garage Gymmer - Steve Peterson. Material: Urethane w/ Chrome Insert When he's not testing equipment and writing about all things fitness, Adam loves spending time with his wife and two children.

This results in a very low bounce that you would normally find on urethane and competition-level bumper plates. The plates are constructed with virgin rubber and they offer a stainless steel center ring. Are you planning to train multiple athletes? When it comes to picking the right plates for your gym, one of the first questions you have to ask is whether you need bumper plates or steel plates. This is good and bad. Ive owned these plates in my home gym since early 2021 and Ive been quite impressed.

If so, then black or colored bumper plates are a great choice. Durometer Rating: 89 (Low Bounce) While these plates dont have a stated durometer rating like some others, in my experience, they offer a very similar bounce as similar plates. Theyre also accurate to +/- 15 grams, which is the minimum for competition-level plates. Price:$345 (45lb Pair) One thing to consider is that these Fringe Sport bumper plates have a slightly thicker profile than some competing plates. Weight System:Pounds & Kilograms These are called training plates, but they are often built the same as competition plates. Theyre simple, attractive, accurate, and approved for the Army Combat Fitness Test (ACFT). The first thing youll notice about these plates is their interesting and fun fleck pattern. CAP Barbell Unisex-Adult Olympic Grip Plate Series. Depending on what type of plates youre using, you can place more than five 45lb plates on one post. The center hubs on these plates are smooth hard chrome, and aside from looking great, they have a very tight tolerance. We chose these options based on quality, longevity, and function. Weight System: Pounds These plates have a high shore durometer rating of 90, which creates a low bounce thats consistent with other urethane plates. Warranty: 6 Months on 10-15lbs & 3 Years on 25lb+. Collar Opening: 50.4mm (1.98) Although it would be nice for all the plates to offer a 90 rating, this is very common on plates of this style, and the bounce is still minimal. Price is another top consideration. Tiers: Three Really love this breakdown. Weight Tolerance: +/- 1% The 2.09 thickness is among the lowest on the market, which is great if youre a heavy lifter considering this is thinner than competition rubber bumper plates. Wed actually say no to this question because youve paid good money for your gear, and wed hate to see you get less of the use and gains you deserve out of them (and less of the life they deserve!). Durometer Rating: N/A (Low Bounce) With the 45s measuring only 2.125 thick, you can load nearly 700lbs on the bar with these plates. Theyre fully colored, although some plates may be black with a colored stripe. Now, get out into your garage gym and lift heavy, lift happy :). The E1 bumper plates from LUXIAOJUN are some of the nicest black bumpers that Ive used. Warranty: 90 Days on 10-15lbs & 3 Years on 25lb+. These competition bumper plates are no exception, and theyre frequently on sale for excellent prices. Take care of your gym gear, and itll take care of you. Warranty: 3 Years. The center ring is not stainless steel, but it does have hooked inserts, which greatly help increase the durability of the plates. Bumper plates can range from budget-friendly to very high-end. Not only are they priced very well, but theyre often on sale. Collar Opening: 50.4mm (1.98) Weight Tolerance: +/- 15 grams These plates offer a low-to-medium bounce with durometer ratings of 85 on 25lb+ variants and 90 on 10lb & 15lb variants.

There are dozens of companies making high-quality bumper plates. Material: Virgin Rubber w/ Steel Insert If you have any questions about bumper plates, please leave a comment below. In terms of aesthetics, the black version includes a matte black finish with contrasting white lettering. The Rogue Fleck Plates offer a unique and fun patterned design with strong specs and performance. Bumper plates range in price based on their materials, lifting purpose, brand, and more. Competition Bumper Plates are the highest-tier bumper plate given their performance and IWF-spec profiles. Competition plates are known for being the most accurate type of bumper plate.

Collar Opening: 50.4mm (1.98) Collar Opening: 50.4mm (1.98) Similarly, hubs can include stainless steel, hard chrome, zinc, etc While not as important beyond mainly aesthetic reasons, this is something else to consider. The LUXIAOJUN Competition Plates offer their staple channel grooves, which make them much easier to handle compared to some other plates, including competition plates. These bumpers from REP Fitness have a guaranteed weight tolerance of +/- 1%, which is common for plates of this style. Material: Virgin Rubber w/ Stainless Insert Cast Iron Plate Weight Plate for Strength Training, Weightlifting and Crossfit, 1-Inch or 2-Inch,Standardor Olympic. One of the best features of the Rogue Fleck Plates is the high durometer rating of 90 on all variants. There are 6 total posts available and theyre spaced 18.275 on center to allow for full-diameter plates. Collar Opening: 50.4mm (1.98) Each plate is different in terms of its fleck pattern. Theyre versatile, theyre quiet, theyre durable, and they look great. If you like the unique fleck design and you see value in the indoor/outdoor capabilities, the Vulcan Alphas are a great buy. In addition to this guide, which will detail everything you need to know about bumper plates, Garage Gym Lab also has a very useful equipment finderthat will filter it down for you based on a few quick questions. The Alpha bumper plates are low bounce as are all of our bumper plates. These plates can be purchased in pairs or sets, and they can also be purchased in color. Theyre also built to IWF specs with a 2 collar opening and a 450mm diameter. I love the Vulcan logo at the bottom with the integrated weight call-out. Weight plates are an essential piece of gym equipment for anyone looking to strength train, and bumper plates are a great option. Our bumper plates are crafted to withstand just about anything, including the elements. The REP black bumpers have raised white lettering, which contrasts nicely to quickly identify plates. Ive weighed all 10 of mine and all are within this guaranteed tolerance.

Collar Opening: 50.4mm (1.98) Weight System: Pounds and Kilograms The colors are bright and theyre coded to the IWF color scheme for easy identification. Collar Opening: 50.4mm (1.98) What makes these plates so attractive, other than their great specs, is their price. Weight System: Pounds & Kilograms I can confirm on my set, having weighed all of them, that they do fall within this range. This can include concrete, asphalt, rubber flooring, and many others. Material: 11-Gauge Steel & Schedule 40 Pipe Another benefit of bumper plates is that theyre very quiet much quieter than iron plates at least. The center hubs of bumper plates play two main roles: they influence durability and change the aesthetic of the plates. Warranty: 4 Years on 35lb+, 3 Years on 25lb, & 1 Year on 10-15lb. Unless youre specifically training as a powerlifter or youre training a lot with plate-loaded machines, bumper plates will offer the most bang for your buck. Competition bumpers, for example, have full steel hubs that are typically hard chrome or zinc. Dimensions:26 long, 24 wide, 50 tall While there are many bumper plate trees and storage options out there, I highly recommend the Rogue Plate Tree 2.0 for most home gym owners. If youre on a tight budget, crumb bumper plates are a solid option, but their performance is lacking relative to others. They also tend to look better for longer relative to steel plates. Ive owned them since 2016 and theyve held up tremendously after years of use. Like the Rogue Competition Plates above, the American Barbell Urethane Bumpers were some of the first plates I added to my home gym. The Vulcan Urethane Bumper Plates are some of the best-looking plates on the market with strong performance to match. I recommend hooked center rings these anchor into the plate, which greatly increases durability and prevents the plates from warping. This will only pose an issue if youre nearing max capacity, but its something worth noting nonetheless. The 45lb plates have a thickness of 2.12, which is very consistent with the market and which allows for nearly 700lbs of bar weight. Durometer Rating: 90 (Low Bounce) Durometer Rating: N/A (Medium Bounce) A raised flange is included to keep the chrome looking great, although some wipe downs may be necessary to remove fingerprints, etc. In a commercial setting, the case for urethane is stronger, especially with the customization possibilities. Weight Tolerance: +/- 1% For example, competition bumpers have the highest durometer ratings (90+) and the lowest bounce. On the other hand, it can be louder sliding the plates on and off and it can cause more imperfections on certain sleeve finishes, namely Cerakote. Other fleck plates on the market, while looking similar, dont offer the same versatility as the Vulcans given their indoor/outdoor design. Shop products from small business brands sold in Amazons store.

When youre lifting weights, you want to lift with plates that are close to their stated weight. No, they are not the same.

In addition to the weight tolerance, the collar opening is also very tight at 50.4mm, which creates a snug fit on the bar. Material: Virgin Rubber w/ Full Zinc Hub Meet Justin & Rebekah Grant - and Take a Look At Their "Family Gym!". The pebble grain surface looks amazing, but it doesnt do much in way of generating friction to alleviate this issue. One other thing to note is that Ive found the collar openings on urethane plates, in general, to be tighter than even competition rubber bumpers. With options for full color, all-black, contrasting lettering, color stripes, fleck patterns, etc there is a lot to choose from based on your aesthetic preferences. They also have a full zinc hub, which is very common. Plates can be used outdoors but should be stored indoors when not in use. For example, the 45lb plate has a thickness of 2.9 whereas the Rogue Echos are 2.36, the LUXIAOJUN Color TQ plates are 2.36, and the REP Color Bumpers are 2.8. Weight Options: 25lb-55lb & 10kg-25kg Price:$249 (45lb Pair) w/ Free Shipping The LUXIAOJUN Urethane Plates have a shore durometer rating of 85, which is lower than most urethane plates (90). This isnt as high as the Rogue plates (94), but it is higher than most other comp plates out there (90). Your bumper plates, especially if theyre black in color, are. Competition bumpers are extremely accurate (usually +/- 10 or 15 grams), theyre thin, and they offer the lowest bounce among bumper plates. bounce on any surface, unlike recycled rubber plates that can bounce dangerously high or "skip" away from you. The appearance of the Alpha Bumper Plates sets is unique and trademarked. You can purchase these plates in pounds or kilograms and theyre available in a variety of sets. Unless youre hitting a ton of volume with a lot of frequency, youre unlikely to achieve the durability benefits over rubber bumper plates in a home gym. Bumper plates are important for shaping your body and making it strong and resilient for sports competitions. I have personally not found a better-looking plate than the American Barbell Urethane Bumpers. Sporzon! Durometer Rating: 94 (Low Bounce) Price and other details may vary based on product size and color. These plates are on the more expensive side, but they include a few advantages because of the urethane material: they have little to no odor, they have the most vibrant colors, and theyre more durable than rubber. Urethane also allows for complete customization in terms of color, logos, etc which is a benefit for facilities or high-end home gym consumers. Yes. Material: Virgin Rubber w/ Full Zinc Hub High-quality bumper plates are built to withstand thousands of drops, making them a very durable option. While the warranty of 3 years isnt as strong as some other plates (5 years), there is little concern that they wont last well beyond that in normal lifting environments especially in a home gym. This ring measures 50.6mm, which is common for a plate of this style. These were the very first plates I ever purchased for my home gym. Price:$199 w/ Free Shipping (45lb Pair) CAP Barbell Black Rubber Bumper Plates, Pair. Being all one color, they arent as easy to identify quickly, but some black bumpers will include contrasting white lettering to help. The Rogue Vertical Plate Tree 2.0 is an excellent option for home gym owners. In terms of the hole opening, it measures 50.4mm, which produces a very snug fit that reduces vibration and noise. Urethane has a few advantages over rubber. These are accurate to within +/- 15 grams. In addition, theyre very accurate with a guaranteed weight tolerance of +/- 10 grams. Price:$299.99 w/ Free Shipping (45lb Pair) Exposure to moisture might not show up right away, but if repeatedly exposed, your bumper plates could start to show signs of rot and the inner ring might show signs of stress and rust, which is not good for your plates, your barbell the plates are used on, or your safety when it comes to heavy lifting and throwing around a barbell with a compromised inner circle and rubber. Virgin rubber is going to hold up better than recycled rubber and urethane will tend to hold up better than both. Weight System: Pounds These plates have a very strong reputation with hundreds of verified reviews dating back to their release in 2014. Basic bumpers have a smaller center ring, oftentimes which is stainless steel. This number, measured from 0-100 states the hardness of the material. Because the 10lb plates are the thinnest, theyre prone to Taco if dropped and met with the ground. Vulcan claims that these plates offer a noise reduction of ~25% when dropped from 9 feet. Weight Options: 25lb-55lb & 10kg-25kg (also available in lb sets and kg sets) Truthfully, those questions are two different scenarios, and weve got the answer for both. Durometer Rating: 92 (Low Bounce) Hearing damage & loss have become issues to some weightlifting coaches and trainers due to the level of noise exposure from multiple athletes dropping bumper plates throughout a training session.