Critique

Critique: Comparison of four specific dynamic office chairs with a conventional office chair: Impact upon muscle activation, physical activity and posture

 

This article gives a report of a study conducted on five different types of office chairs and their effects on muscle activation, physical activity and posture. The structure of this article is organized like a lab report, giving 5 sections to explain the purpose of the experiment as well as the findings and results. Within each larger section, there are smaller components to elaborate on specific aspects of the experiment.

The experiment is conducted to determine if there is a relationship between lower back pain and sitting in an office chair. The introduction gives a record of previous studies on the topic as well as a clear preview of this experiment. Each component of the study is introduced at the beginning of the article making the process, at first, relatively easy to follow. This study provided a tremendous amount of research and evidence to prove that there are insignificant differences between the specific dynamic chairs and their effects on posture and muscle activation. The study was composed of a field experiment and a laboratory experiment which both showed that there was little difference between the chairs in regards to their impact on posture and physical activity intensity. The data was given in the results section, and the charts provided presented the data in a more comprehensible approach.

The article, overall, was challenging to understand because of the tremendous amount of data from other sources and the study that was presented. The discussion analysis of the data and the conclusion clarified much of the previous sections in the article. Though the language is confusing at times, the structure of the article helps when figuring out what specific element of the study is being analyzed.  I think that dividing the article up into sections was beneficial because it presented the findings in “bite size” pieces. The charts gave a visual that organized the data in a more manageable method. This study was interesting, and the results were not what I had expected them to be. I found the experiment to be very informative, but challenging to decipher in some areas.

Summary

Summary of Comparison of four specific dynamic office chairs with a conventional office chair: Impact upon muscle activation, physical activity and posture

 

This journal article reports a study conducted on office chairs and their effects on muscles and posture. This article is composed of five sections: the introduction, methods, results, discussion, and conclusions.

The introduction brings to attention the effects of static office chairs on one’s muscles and posture by acknowledging previous studies on this topic. A research question is raised, “Do these specific dynamic office chairs influence physical and muscle activity more than a conventional office chair?”

The methods section is broken down into sub-categories; introducing the subjects, types of chairs, the laboratory and field studies, procedure, and data plan. Five men and five women volunteered to participate in this experiment. Five different types of office chairs (A, B, C, and E with D as a reference chair) were tested by having the volunteers complete typical office work, such as typing on a keyboard and telephoning, for 90 minutes per chair. Movement sensors were placed on each subject to gather electromyographic measurements from body joint angles and positions of the head, spine, and legs.

The results of the laboratory and field studies are given through 5 different charts measuring the mean values over the 10 subjects of several categories. The charts measure posture and joint angles, physical activity intensities, and chair parameters. “The statistical analysis yielded no significant differences between the specific dynamic chairs in comparison with the reference chair; highly significant differences were, however, observed for the m. trapezius muscle activation levels for the task analysis.”

The discussion section worked to answer the question raised in the introduction. The researchers compared the findings in a sixth chart, but concluded that there were insignificant differences among the dynamic office chairs and the reference chair regarding posture and muscle and joint angles. However, the chair parameters showed significant differences in each individual chair. Each chair had a different dynamic with the back rest and the inclination of the seat, but even with these individual differences, there were no major differences among muscle activation.

The conclusion stated that the different characteristics of the specific dynamic chairs showed almost no effect on posture and muscle activation.

 

 

Pedestrian Safety Sources

http://ehis.ebscohost.com/eds/pdfviewer/pdfviewer?sid=143f3fa8-573a-43ce-8316-05fdcbe1420e%40sessionmgr110&vid=12&hid=107

http://uw8rw3ad9q.search.serialssolutions.com/?genre=article&issn=00014575&title=Accident+Analysis+%26+Prevention&volume=59&issue=&date=20131001&atitle=Factors+influencing+safety+in+a+sample+of+marked+pedestrian+crossings+selected+for+safety+inspections+in+the+city+of+Oslo.&spage=64&pages=64-70&sid=EBSCO:Business+Source+Complete&aulast=Elvik%2c+Rune

http://leg1.state.va.us/cgi-bin/legp504.exe?000+cod+46.2-924 -laws regarding pedestrian safety

http://www.virginiadot.org/vtrc/main/online_reports/pdf/08-r5.pdf

Project 2 Annotated Bibliography

Brown, Kelly. “The Effects of Bad Work Chairs | EHow.” EHow. Demand Media, 03 May 2011. Web. 29 Sept. 2013.

This source provided useful information about the importance of supportive chairs for physical and emotional health. It stressed the necessity of supportive desk chairs to reduce back and body pain as well as to prevent poor posture.

 

Clare, Sylvia. “Poor Posture Can Make You Sick: How To Improve Your Posture.”Health Mad. Health Mad, 3 Nov. 2010. Web. 01 Oct. 2013.

This source gave a detailed explanation of the importance of good posture. Since posture can be affected by unsupportive desk chairs, this source was helpful for understanding how poor posture will harm your health.

 

Smith, Mark E. “SpinLife’s Guide to Seat Cushions.” Guide to Seat Cushions. Spin Life, n.d. Web. 01 Oct. 2013.

This site showed different types of seat cushions, the cost, and the benefits. The website is designed for handicap people to find a seat cushion for their wheelchairs that will eliminate back pain.

 

Triano, John J., PhD. “Office Chair Back Support.” Spine-health. N.p., n.d. Web. 30 Sept. 2013.

This article gave quality information about the need for supportive office chairs. The article explained the negative effects of unsupportive office chairs, such as back pain and poor posture. The article explained how to adjust an office chair to meet personal needs and the sit correctly to avoid back and posture problems.

The Power of Habit Critique (pages 259-274)

The purpose of this chapter is to identify the role of free will within habits and conclude the book. Author Charles Duhigg keeps a consistency regarding the structure of each chapter all the way through the conclusion of his work. Like all other chapters, multiple examples are used to illustrate the author’s ideas. In this last section of The Power of Habit, Duhigg successfully ties in the rest of the book while introducing a new concept: the power of free will enables a person to change any habit.

The chapter begins like every other chapter; it introduces a couple different examples in depth, giving the reader a complete understanding of the cases that the author will later analyze. In this section, two entirely different cases are used to demonstrate the influence of free will on habits. The first case studies Angie Bachmann; a typical wife and mother of three who develops a devastating addiction to gambling, leading to the family’s bankruptcy. The second example features Brian Thomas; a man notorious for sleepwalking who experiences a sleep terror and unconsciously murders his wife. With both of these examples, the author initially implies that these subjects did not have a choice and acted on habits. However, he will later clarify that anyone has the freedom and responsibility to change a habit. Duhigg writes, “Every habit, no matter its complexity, is malleable.” (pp.270)

The conclusion of this book is well executed, successfully uniting several ideas highlighted in previous chapters. In this final chapter, Duhigg applies the Golden Rule of habit change: identify the cue and reward of a habit and change the routine. For Bachmann, she saw herself as the victim of her bad habit and never made a strong enough effort to change her behavior. The cue for her habit was emotional stress caused by marital problems and the death of her parents. She would gamble to feel a satisfaction that winning or coming close to winning would give her. When Bachmann found herself in a lawsuit regarding the debt she owed the casino, she blamed the habit for her behavior. Her excuse did not pass in the court, and she was held responsible for her actions. For Thomas, the cue and routine for his habit happened while he was asleep. Unlike most people whose bodies naturally paralyze while unconscious, Thomas’s body is active while dreaming. When experiencing a sleep terror, Thomas believed that he was pulling another man off of his wife and strangling him automatically out of defense. When he woke, he discovered that he had strangled his wife to death. Thomas was found not guilty and discharged for the crime because he acted unconsciously; out of deep habit. Duhigg successfully connects two dissimilar examples back to the concept of free will. Bachmann’s actions may have been dominated by her habits, but she certainly had the ability to change her routine. For Thomas, he lacked free will to control his habits since he was unaware of what they were capable of doing.

Duhigg effectively concluded his book by restating the importance of belief and the understanding that habits can be chosen. This final section was easy to follow and remained structurally consistent with the rest of the book. The author could have spent more time connecting back to previous examples in his conclusion to tie the book together, but his method of introducing the role of free will is still effective. He ends his book with a positive message, empowering the reader with the tools and mindset needed to control and change any habit.

 

Outline:

Angie Bachmann (married young, mother of 3, develops gambling addiction)

-Begins gambling to give her something to do

-Sets strict guidelines to avoid addiction

-Gradually becomes more lenient about gambling

-Eventually took over her life, becoming a habit

Cue (stress, fighting with her husband)

Routine (gambling)

Reward (winning)

 

The story is intriguing and keeps the reader engaged.

 

Brian Thomas (victim of sleep terror, killed his wife)

-Notorious for sleepwalking

-Killed his wife while asleep

-Brain activity during sleep terrors look similar to the brain following a habit

-People who commit crimes unconsciously aren’t responsible for the crimes

-Thomas was discharged with the crime and set free

 

Thomas is not responsible for his crime, but Bachmann is.

 

Bachmann’s parents passed away and she inherited nearly $1 million

 

-The stress of her parents’ passing led her to gambling again

-She developed an addiction to gambling leading to bankruptcy

-Casino sued her for the debts she owed

-Attempted to countersue the casino for extending her credit and paying for trips to gamble.

-Claimed to be reacting automatically to casino’s temptations

-She did not win because she is responsible for her habit

 

Conclusion of the book

Habits are different: there are different cues and different rewards. In order to change the habit, you must identify the cue, routine, and reward.

 

“Every habit, no matter its complexity, is malleable.” (270)

“Once you know a habit exists, you have the responsibility to change it.” (271)

Free will:

“The will to believe is the most important ingredient in creating belief in change.” (273)

“If you believe you can change—if you make it a habit—the change become real. This is the real power of habit: the insight that your habits are what you chose them to be.” (273)

 

Notes:

This was a good conclusion to the book by ending with the topic of free will. The very different examples still connected back to a lack of free will. Bachmann faced an addiction and Thomas was unconscious. In the end, we are all responsible for our habits and correcting them and changing them.

The end of the chapter was effective by keeping the consistent structure of each chapter by using examples. The conclusion to the book didn’t strictly summarize the rest of the chapters but was able to tie in the rest of the ideas throughout the book using two examples.

The Golden Rule of Habit Change: Chapter 3 Summary

Chapter three discusses the Golden Rule of habit change. The “Golden Rule of habit change” provides a technique for changing a bad habit. Habits are composed of a cue, routine and reward.  Charles Duhigg explains through a few different examples that a habit never goes away but can only be changed.

 

The Tampa Bay Buccaneers was one of the most unsuccessful teams in the NFL. Head coach, Tony Dungy planned to change his team by using a new philosophy of habit change. He wanted to create new habits within his players which would allow them to react automatically during a play, rather than thinking. Dungy taught his team only a few plays, in which they would practice until it became a habit. With this new tactic, the Buccaneers beat San Diego 25 to 17 and began to turn their season around.

 

In 1934, Bill Wilson was struggling with alcoholism. Consuming three bottles of liquor a day, Wilson lost his job and needed a drastic habit change. An old drinking buddy had been sober for two months and recommended that Wilson admit his addiction and turn over his life to God. He then checked himself into a detox center in Manhattan and endured an intensive treatment, resulting in his sobriety. He then devoted his life to developing Alcoholics Anonymous, which has become a tremendous success across America. The twelve step program works because it uses the golden rule of habit change. “The program forces people to identify the cues and rewards that encourage their alcoholic habits, and then helps them find new behaviors.”

 

In another example, twenty-four-year-old Mandy had a severe habit of biting her nails. With the help of a psychologist, Mandy worked to identify the trigger of her habitual behavior, and find a way to replace her routine. She was told to keep track of her cues on an index card. The next week, she came back with twenty-eight marks. To satisfy her craving, Mandy replaced biting her nails with a physical stimulation like gripping a pencil or putting her hands in her pockets. After a month, the nail biting had stopped.

 

The Buccaneers were successful until it came to high pressure games. They were willing to rely on their new habits, but lost their trust in the new system under pressure. After the second year of missing the Super Bowl, Dungy was fired.

 

For members of AA, habit replacement works well until the stresses and tragedies of life lead to falling off the wagon. Spirituality is heavily incorporated into AA to give members something to believe in. “AA trains people in how to believe in something until they believe in the program and themselves.”

 

After losing his job with the Bucs, Dungy was hired as head coach for the Colts. Using habit change, Dungy quickly turned the Colts into a successful team. Their only fault was that under pressure, they would choke. With the tragic loss of Dungy’s son, the Colts found something to believe in; their coach. The Colts had one of the most miraculous seasons, and went on to win the Super Bowl.

 

Habits can only be replaced, not eliminated. With the help of a community and something to believe in, habit change is feasible.

 

 

 

 

Works Cited:

Duhigg, Charles. The Power of Habit: Why We Do What We Do in Life and Business. New York: Random House, 2012. Print.