Joint Press

Joint Press

Form And Position Variability Of Standard Flat Barbell Chest Press

FORM AND POSITION VARIABILITY OF STANDARD, FLAT, BARBELL CHEST PRESS

 (Robby Wilson, Owner/founder of Fitness Mastermind)

SHORT:

          It is widely accepted among strength training specialist and fitness professionals that the wide grip chest press exhibits a larger torque on the pectoralis major, while close grip exhibits larger torque on the tricep brachii and anterior deltoid muscles. In addition,  moving away from the nipple line in both superior and inferior directions results in an excess torque on the Glenohumeral joint. When positioning your legs, by narrowing the leg stance  the base of support is compromised due to the loss of stability. In relation to common motion techniques, by pausing throughout the different phases of the lift (eccentric; concentric) you will inhibit the muscle spindles from interfering with execution of the motion. However, without the pausing effect you will activate less of the targeted muscles as a result of taking advantage of the "elastic series component" concerning the tendons giving a spring effect in order to push the weight off the chest.   

CONCLUSION:

            In terms of grip width on the standard flat chest/bench press,  torque amount will be varied on the primary and synergist muscles in accordance.  The wide grip exhibits greater torque on the pectoralis major muscle as the moment arm is longer (torque is equal to the force multiplied by the  distance from the point of rotation, or the moment arm). Through the motion of a standard flat chest press, the axis of rotation when executing the lift is at the deltoid muscles. The close grip exhibits greater torque on the tricep brachii and anterior deltoid muscles as the moment arm has a greater length.  Concerning the narrow grip of the barbell, the axis of rotation used is the elbow.  Excess elbow torque is likely to yield great damage to the joint.  The most optimal biomechanical position to incorporate is the wider grip as the deltoid is less likely to injury resulting from high torque than the elbow.

            Concerning torque, superior and inferior movements from the nipple line/mid-chest will likely yield a high torque on the glenohumeral (Gh) joint that could result in the dislocation of the humeral head. Dislocation on the Gh joint could in turn yield soft tissue damage or impingement syndrome. The high torque results from a deviation of the normal lifting position.  If properly executed, the standard flat chest press should yield low and safe amounts of torque on these stated joints.

            In relation to the "sticking point" of the bench press, the bar path during the bench press travels along an arc, which rotates about the shoulder axis. In essence this takes place as a result of the shoulder being a ball and socket joint, yielding prevention of dislocations. This in turn, decreased the amount of force production throughout the motion of the lift. Also, since some muscles cross two joints, forces must exhibit synergistic qualities to move both. The barbell must utilize a more linear path to yield optimal force production,  which will in turn inhibit the sticking point from occurring.  Torque is created with an arc motion, thus decreasing force production.

             In the case of the distance between the lifter's feet, a wider stance on the ground yields an increased base of support. When base of support is compromised the body compensates by the recruiting core muscles to yield an increased stability and injury prevention.

About the Author

Robby Wilson, Owner/Founder-FITNESS MASTERMIND

ACE-Certified Personal Trainer, Certified Sports Nutrition Specialist, Boot Camp specialist

B.S. Exercise Physiology-Dietetics

Www.fitnessmastermindtx.Com

(phone) 512.663.3573,   (e-mail) Robby@fitnessmastermindtx.com

Ball Joint Press Tool $17.99 HydroDynamics Ball Joint Press Tool Comes complete with all of the bolts to fit the largest number of applications Will not damage ball joints or a-arms A must have for the professional mechanic or weekend warrior

Ball Joint Press With 4Wd Adapters $99.95 ? Ball joint service ? Universal joint service ? Truck brake anchor pin service ? Four wheel drive ball joint service ? Will remove even rusted and corroded parts ? Includes: C-Frame press, 3 Receiver tubes (2-3/4''I.D.x3''O.D., 2-1/4''I.D.x2-1/2''O.D. and 1-3/4''I.D.x2''O.D.), 1 Installing adapter, 1 Removing adapter, 1 Installing cup, 1 Receiving cupBy Astro Pneumatic.

Astro Pneumatic Ball Joint Press With 4WD Adapters $79.36 Ball joint service Universal joint service Truck brake anchor pin service Four wheel drive ball joint service Will remove even rusted and corroded parts Includes: C-Frame press, 3 Receiver tubes (2-3/4 inchI. D. X3 inchO. D. 2-1/4 inchI. D. X2-1/2 inchO. D. And 1-3/4 inchI. D. X2 inchO. D. ), 1 Installing adapter, 1 Removing adapter, 1 Installing cup, 1 Receiving cup

Lisle Ball Joint / Truck Brake Anchor Pin / U-Joint Press $174.95 Tough Tool Makes easy Work of 3 Different Jobs. Removes and installs press fit type ball joints found on cars and light trucks. Tool makes removing and installing truck brake anchor pins fast and easy. Also works on u-joints to press joint from the drive shaft for replacement. Tool comes with detailed instructions and a heavy-duty plastic storage case.

OTC Ball Joint C Frame Press. Each $107.67 Manufacturer: OTC. Each. Features Benefits: With this rugged C-frame press, you can easily remove the often rusted truck brake anchor pins. Mechanical screw power of the No. 7248 does the job quickly and with little effort. With this press you can hand

OTC OTC7248 Ball Joint CFrame Press $132.29 Features and Benefits: No. 7248 Cframe press for anchor pins Weight: 9 lbs. 6 oz.With this rugged Cframe press you can easily remove the often rusted truck brake anchor pins. Mechanical screw power of the No. 7248 does the job quickly and with little effort. With this press you can handle truck brake pins up to 1 1/4 diameter.

Press On $11.49 Press On

Joint $8.99 Joint - Poster

KD Tools Ford E - Van Adapter for KDT3421 Ball Joint Press. Each $89.01 Manufacturer: KD Tools. Each. Features and Benefits: Use in conjunction with KDT3421 Ball joint/U-joint/Anchor pin press set to remove lower ball joints on Ford vans Applications: 1992 and newer Ford E-250 and E-350 3/4 and 1 ton full size vans Customer

ATV Ball Joint Separator $17.99 Designed to separate the knuckle-ball joints on Honda and Yamaha ATV models Will not damage the A-arm, ball joint stud or rubber boots Sold as a kit with both types of press bolts to fit Honda and Yamaha models Fits Honda TRX 250X/300EX '87-96 Fits Yamaha YFZ 350/YFM350 '87-96

Lisle Pneumatic U-Joint Driver. Each $25.08 Manufacturer: Lisle. Each. Features and Benefits Faster than using a press or chisel Less than half the cost of Press-type Will not damage drive shaft and axle shaft ears like a press and a chisel will Fits a wide range of U-Joint Caps, up to 1-5/16" dia

OTC Ball Joint Installer / Remover. Each $137.78 Manufacturer: OTC. Each. Features Benefits: This set removes and replaces ball joints. The C-frame press alone can also be used to remove and replace universal joints. Ball joint removing/installing set for most press-fit ball joints. Wt., 15 lbs.,

1996-1999 Chevrolet K1500 Suburban Ball Joint Mevotech Chevrolet Ball Joint MK6509 96 97 98 99 $33.13 MEVOTECH PRESS-FIT TYPE BALL JOINT, SOLD INDIVIDUALLY -- 47.79 mm diameter; Fits forged type control arms; Greasable; This is a high quality, OE replacement ball joint.. Auto Parts Warehouse has extensive Mevotech Ball Joint catalogs.We are now offering FREE shipping on all Mevotech Ball Joint orders over $50.00. Our secure mevotech ball joint catalog is available every hour of everyday. Shop with confidence for all your mevotech ball joint needs. Mevotech Ball Joint are In Stock and available today. Save up to 60% off dealer price on your next Mevotech Ball Joint purchase. Our online catalog contains a wide selection of the OEM and aftermarket parts you need at unbeatable prices

Astro 7868 Ball Joint Adaptor Kit without Press $87.58 Includes all the receiving tubes and removing/installing adapters needed to work on most GM Ford and Dodge 2wheel and 4wheel drive pickups vans and sport utility vehicles through 1997 Work on pressfit upper and lower ball joints Set also includes live center forcing screw plug and a plastic storage/carrying case

Press $24.99 Press - Photographic Print

OTC Master Ball Joint Adapter Set. Each $307.47 Manufacturer: OTC. Each. Features Benefits: This set was created specifically to expand the capability of your No. 7249 ball joint service set. It includes all the receiver tubes and removing/installing adapters needed to work on press-fit upper and lo

CTA Ball Joint Service Set $140.95 Contains: Press 3 Receiver tubes Installation and removal adapters Also services U-joints and heavy-duty truck brake anchor pins

J.E. Reel H20 Proof Axle U-Joint $87.99 Replaces D/S 5-297X u-joint;40% stronger than O.E Spicer factory u-joint;Cryogenically treated for strength & durability;U-joint is forged from a high strength alloy steel;Seal has a press fit that keeps grease in and water & mud out;Full circle snap rings;stronger trunnion, larger diameter radius that reduces fracture points;Inside snap ring;Cup size = 1.188";Snap ring to snap ring = 2.188" JEEP WRANGLER (87-95YJ) WRANGLER (97-06LJ) WRANGLER (97-06TJ) 65TH ANNIVERSARY EDITION RIO GRANDE RUBICON SAHARA SE SPORT UNLIMITED UNLIMITED RUBICON X 1995 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2.4L Power-Tech (148) 2.5L (150) 4L Power Tech (242) GAS with Lubeable with Highway Rated J.E. Reel H20 Proof Axle U-Joint

OTC Car Master Ball Joint Service Kit. Each $617.61 Manufacturer: OTC. Each. Features and Benefits: Finally, a complete ball joint service kit for cars! Master Ball Joint Service Kit with 50+ adapters Includes all adapters for applications up to 2008+ Includes reference guide thru 2008 referencing press f

OTC OTC653910 Truck Ball Joint Master Set Upgrade $390.29 Truck Ball Joint Service Kit with adapters to allow removal and installation of press fit ball joints on Truck/Van/SUV's requiring serivce. 18 additional adapters required to complete a 6539 Truck Ball Joint Master Set when added to the 6529 Car

Ball Joint Service Tool Set $127.95 This set removes and replaces ball joints. The C-frame press alone can also be used to remove and replace universal joints. Includes: ? C-frame press ? Receiver tube (3'' O.D. x 2-3/4'' I.D.) ? Receiver tube (2-1/2'' O.D. x 2-1/4'' I.D.) ? Receiver tube (2'' O.D. x 1-3/4'' I.D.) ? Installing adapter ? Removing adapter ? Carrying case

Joint SourceChannel Decoding By Duhamel, Pierre/ Kieffer, Michel $181.12 Joint sourcechannel decoding is seen as a viable alternative to separate decoding of source and channel codes. This book provides the tools to show how crosslayer and joint source coding are compatible to mobile and wireless networks, with a particular application to the key area of video broadcasting. Author: Duhamel, Pierre/ Kieffer, Michel Series Title: Eurasip and Academic Press Series in Signal and Image Processing Subtitle: A CrossLayer Perspective With Applications in Video Broadcasting Over Mobile and Wireless Networks Publication Date: 2009/12/24 Number of Pages: 326 Binding Type: Hardcover Language: English Depth: 1.00 Width: 6.25 Height: 9.00

1999-2000 Cadillac Escalade Ball Joint AC Delco Cadillac Ball Joint 45D2233 99 00 $46.71 AC DELCO CONTROL ARM BALL JOINT, SOLD INDIVIDUALLY -- 45.79 mm or 1.8 in. press fit diameter; Includes dust boot, nuts, bolts, and other mounting hardware; Features precision-machined housing, high-resistant polyurethane boots that eliminate contaminants while resisting damage, and low-friction bearing design for easier steering and better run-to center; Case-hardened and coated for strength, durability, and corrosion resistance.. Auto Parts Warehouse has extensive AC Delco Ball Joint catalogs.We are now offering FREE shipping on all AC Delco Ball Joint orders over $50.00. Our secure ac delco ball joint catalog is available every hour of everyday. Shop with confidence for all your ac delco ball joint needs. AC Delco Ball Joint are In Stock and available today. Save up to 60% off dealer price on your next AC Delco Ball Joint purchase. Our online catalog contains a wide selection of the OEM and aftermarket parts you need at unbeatable prices

OTC Master Ball Joint Adapter Set $329.95 This set was created specifically to expand the capability of your OTC7249 ball joint service tool set. It includes all the receiver tubes and removing/installing adapters needed to work on press-fit upper and lower ball joints on most GM, Ford, and Dodge, 2 and 4-wheel-drive pickups, vans, and sport utility vehicles, through 1997. Also includes the No. 7917 live center forcing screw plug. Packaged in a convenient carrying case and includes application chart.

OTC OTC6539 Truck Master Ball Joint Service Kit $960.67 Truck Ball Joint Service Kit with adapters to allow removal and installation of press fit ball joints on Truck/Van/SUV's requiring serivce. 18 additional adapters required to complete a 6539 Truck Ball Joint Master Set when added to the 6529 Car Ball Joint Adapter Set. This kit along with the 6529 gives you the most complete kit available. For use with OTC USA made C frame 7248. Included in application cross reference and instructions included. Does not include OTC7248 press. Dimensions: 28 x 20 x 14.5 .

Steering Joint $1.8 Steering Joint

Universal joint A $1.6 Universal joint A

Joint Assembly $109.99 Joint Assembly

Joint Clash $11.49 Joint Clash

Joint Happening $11.49 Joint Happening

Daddies Joint $12.49 Daddies Joint

Hip Joint $8.99 Hip Joint

Joint Favourites $8.99 Joint Favourites