Matching Items (3)
Description
Eccentric muscle action (ECC) occurs when the force exerted by a working muscle is less than that of an outside resistance. This is characterized by muscle lengthening, despite actin-myosin crossbridge formation. Research has indicated that muscles acting eccentrically are capable of producing more force when compared to muscles acting concentrically. Further, research has shown ECC muscle actions may have different fatigue patterns that CON actions. The purpose of this study was to determine if a) ECC bench press yields greater strength than concentric (CON) as measured by one-repetition maximum (1RM), b) there is a difference between the number of repetitions that can be completed concentrically and eccentrically under the same relative intensities of 1RM (90%, 80%, 70%, 60%), c) a prediction model may be able to predict ECC 1RM from CON 1RM or CON repetitions to fatigue. For this study, 30 healthy males (age = 24.63 + 5.6 years) were tested for 1RM in CON and ECC bench press, as well as the number of repetitions they were able to complete at various intensities of mode-specific 1RM. A mechanical hoist was affixed to a gantry crane and placed over a standard weightlifting bench. The hoist was connected to 45lb plates that were loaded on a standard barbell, which allowed for mechanical raising and lowering of the barbell. For CON repetitions, the weight was mechanically lowered to the chest and the participant pressed it up. For ECC repetitions, the weight was mechanically raised and the participant lowered it. Paired t-tests showed that ECC 1RM was significantly (p < 0.05) greater than CON 1RM (ECC =255.17 + 68.37lbs, CON = 205.83 + 58.43lbs). There was a significant difference (p < 0.05) between the number of repetitions completed at 90% 1RM (CON = 4.57 + 2.21 repetitions, ECC = 7.67 + 3.24 repetitions). There were no differences in repetitions completed at any other intensity 1RM. CON 1RM and the number of repetitions completed with two different absolute loads (130-150lbs and 155-175lbs) concentrically and eccentrically were valid predictors of ECC 1RM. These data indicate that ECC actions yield increased force capabilities than CON actions, there is no difference in the rate of the fatigue, and ECC 1RM may be predicted from various CON tests.
ContributorsKelly, Stephen B., Jr (Author) / Hooker, Steven (Thesis advisor) / Brown, Lee (Committee member) / Buman, Matthew (Committee member) / Gaesser, Glenn (Committee member) / Swan, Pamela (Committee member) / Arizona State University (Publisher)
Created2013
Description
For my Honor’s Project for Barrett the Honors College, I chose to research and develop an
application on the topic of Ideal Weightlifting Volume and Frequency for The Male Lifter. The
reason I decided to center my project around this topic is due to the plethora of information
available on this subject matter. However, I was more driven to pursue this subject matter due to
the lack of implementation and usage of all the relevant information and case studies offered to
us through the means of online journals, abstracts, reports, etc.
The application will be programmed using the software known as Android Studio. Inside
Android Studio, the programming language that will be utilized is Java. The goal for this
application is to gather information from the user, and with that information, create a conducive
weekly weightlifting regiment based on the wants and needs of the user. Furthermore, the
application will only create programs on a week to week basis, thus encouraging the user to
dabble with different preferences each week. Outputting the program on a week-to-week basis is
an integral logic of this program because it is my belief that if the user is given the privilege to
change their programming on a weekly basis this will allow for flexibility, adaptability, and the
pursuance of short-term goals, which is much more tangible in the onslaught of obtaining a goal.
When browsing through the app store or the internet, it is incredibly difficult to find online
programs that utilize research and scientific credibility. Many of these programs and trainers
offer quick results that are flashy and trendy, however lack any real qualitative reinforcement.
Thus, it is my mission, with my application, to create a program that is intuitive for the user, as
well as to provide scientific programming with proper citation of case studies and reports
conducted by educated individuals.
application on the topic of Ideal Weightlifting Volume and Frequency for The Male Lifter. The
reason I decided to center my project around this topic is due to the plethora of information
available on this subject matter. However, I was more driven to pursue this subject matter due to
the lack of implementation and usage of all the relevant information and case studies offered to
us through the means of online journals, abstracts, reports, etc.
The application will be programmed using the software known as Android Studio. Inside
Android Studio, the programming language that will be utilized is Java. The goal for this
application is to gather information from the user, and with that information, create a conducive
weekly weightlifting regiment based on the wants and needs of the user. Furthermore, the
application will only create programs on a week to week basis, thus encouraging the user to
dabble with different preferences each week. Outputting the program on a week-to-week basis is
an integral logic of this program because it is my belief that if the user is given the privilege to
change their programming on a weekly basis this will allow for flexibility, adaptability, and the
pursuance of short-term goals, which is much more tangible in the onslaught of obtaining a goal.
When browsing through the app store or the internet, it is incredibly difficult to find online
programs that utilize research and scientific credibility. Many of these programs and trainers
offer quick results that are flashy and trendy, however lack any real qualitative reinforcement.
Thus, it is my mission, with my application, to create a program that is intuitive for the user, as
well as to provide scientific programming with proper citation of case studies and reports
conducted by educated individuals.
ContributorsMallick, Zeeshan Khursheed (Author) / Marsit, Joseph (Thesis director) / Chisum, Jack (Committee member) / Computer Science and Engineering Program (Contributor) / Barrett, The Honors College (Contributor)
Created2019-05
Description
****Project Disclaimer: Unfortunately due to the COVID-19 outbreak during Spring 2020, ASU shut down in-person classes and campus facilities as means to prevent the spread of the virus. This meant though that a polished final podcast recording was unable to be made. Instead, a first-run, practice podcast recording that was recorded before the shut down is uploaded in its stead as a reference as to how the final was intended to sound and be produced. ****
Cellular hypertrophy is an anaerobically-based, adaptive process that mammalian skeletal muscle undergoes in response to damage resulting from unaccustomed force generation by the muscle. Hypertrophy allows for the muscle tissue to recover from the immediate injury and also to be rebuilt more capable of withstanding producing the same amount of force without injury, should it happen again. This means the end result of an adapted muscle is an overall more efficient tissue. The ability to regenerate after damage to the structure and function of the muscle tissue is a highly orchestrated event involving multiple steps and key events to occur. Most briefly, a mechanical load is attempted to be lifted but due to demanding a high amount of contractile force to lift, it causes microdamage to the structural and contractile elements of muscle fiber’s sarcomeres. In addition to an inflammatory response, satellite cells, as a part of a myogenic response, are activated to invade the fiber and then permanently reside inside to produce new proteins that will replace the damaged and necrotized proteins. This addition of cellular content, repeated over multiple times, results in the increased diameter of the fibers and manifests in the visual appearance of skeletal muscle hypertrophy. These steps have been listed off devoid of the contexts in which it takes for these to occur and will be addressed within this thesis.
Cellular hypertrophy is an anaerobically-based, adaptive process that mammalian skeletal muscle undergoes in response to damage resulting from unaccustomed force generation by the muscle. Hypertrophy allows for the muscle tissue to recover from the immediate injury and also to be rebuilt more capable of withstanding producing the same amount of force without injury, should it happen again. This means the end result of an adapted muscle is an overall more efficient tissue. The ability to regenerate after damage to the structure and function of the muscle tissue is a highly orchestrated event involving multiple steps and key events to occur. Most briefly, a mechanical load is attempted to be lifted but due to demanding a high amount of contractile force to lift, it causes microdamage to the structural and contractile elements of muscle fiber’s sarcomeres. In addition to an inflammatory response, satellite cells, as a part of a myogenic response, are activated to invade the fiber and then permanently reside inside to produce new proteins that will replace the damaged and necrotized proteins. This addition of cellular content, repeated over multiple times, results in the increased diameter of the fibers and manifests in the visual appearance of skeletal muscle hypertrophy. These steps have been listed off devoid of the contexts in which it takes for these to occur and will be addressed within this thesis.
ContributorsDwyer, Lauren Mingna Carol (Author) / Hyatt, JP (Thesis director) / Kingsbury, Jeffery (Committee member) / School of Life Sciences (Contributor) / School of Art (Contributor) / Barrett, The Honors College (Contributor)
Created2020-05