Rodgers FMA

Question 1

what is FMA

- what is the purpose of it

Answer 1

muscle fatigue assessment

- identify tasks that lead to the most fatigue accumulation, as fatigued muscles increase the potential for injuries

Question 2

what was the FMA originally designed for?

Answer 2

assess automobile assembly lines and fabrication tasks

Question 3

The MFA is best designed to assess production tasks having ______ repetitions/minute

Answer 3

<12-15

Question 4

2 limitations of the FMA

Answer 4

1. The MFA will underestimate the fatigue accumulation in sustained postural tasks (>30 repetitions/minute) as there is not enough time for full relaxation of the muscles between efforts
2. the MFA will underestimate fatigue accumulation in tasks postural loads are sustained for longer than 30s

Question 5

the MFA is most effective when used to assess ?

Answer 5

all muscle groups for each task

Question 6

muscle groups more vulnerable to fatigue accumulation involve _____________, _______________, or ________________, as opposed to short bursts of heavy loading

Answer 6

1. light loading
2. long holding times
3. high reps

Question 7

what do you do after changes have been made to improve the task?

Answer 7

reassess all muscle groups in order to ensure that the stress of the task hasnt simply been shifted to another area

Question 8

what 3 things do you consider when determining what type of job would benefit from undergoing MFA

Answer 8

1. jobs with high incidence of injuries or complaints
2. difficulty finding people who can do or willing to do the job
3. bad rep among workers or supervisors

Question 9

Once problematic jobs have been determined, choosing which tasks need further assessment can be determined through the following (2)

Answer 9

1. Choose tasks that workers/supervisors rate as difficult, of long duration, high frequency
2. Review incident/accident reports, choosing tasks that are most frequently associated with problems

Question 10

what do you do before analyzing the task in question ?

Answer 10

acquire a minimum of 5 min video of unedited footage

the footage is use to determine the intensity, frequency and duration od task

Question 11

what 3 values combined generate the 3 # rating which in turn corresponds to a priority for change score

Answer 11

intensity, duration, frequency

Question 12

what do workers use to rate the intensity of efforts ?

- if 25% of ppl cant do the task what does this mean?

Answer 12

• borg scale rate of perceived exertion

- the effort level required for task is too high and a borg rating of 4

Question 13

how do you assess duration of the task

Answer 13

a stopwatch is used to the time the duration of continuous effort at a given intensity prior to a change in intensity or relaxation
- this is done for each body part at each given intensity

Question 14

what does the borg scale look like for rating duration

Answer 14

1 - <6s
2 - 6-20s
3 - 20-30 s
4 - >30 s (priority)

Question 15

what does the borg scale look like for assessing intensity

Answer 15

1 - light
2 - moderate
3- heavy
4- <75% of all workers can exert effort

Question 16

how do assess frequency?

Answer 16

• determine the number of efforts at a given intensity over 1 minute for each body part
• if the task is variable measure the frequency over 5 minutes and divide by 5 to get a 1 minute average

Question 17

what does the borg scale look like for assessing frequency

Answer 17

1 - <1 effort/min
2 - 1-5 effort/min
3 - 5-15 effort / min
4 - >15 effort / min (priority)

Question 18

what order to assess the 3 major components in?

Answer 18

intensity, duration , frequency

Question 19

once effort intensity, duration and frequency have been assessed what do you do with the scores? and what do these scores mean?

Answer 19

combine them to get a 3 number rating score
- sum of:
3=low
6=moderate
7 = high
8= very high
- high and very high = immediate attention
–> if you get a high score you need to determine how much its need to be changed to become low and why it is so high (determine roots)

Question 20

what do you do after changes have been made

Answer 20

re assess!

Question 21

head turned partly to the side, back or slightly forward

- what intensity score for neck

Answer 21

light-1

Question 22

head turned to side, head fully back, head forward about 20 degrees
- what intensity score for neck

Answer 22

moderate - 2

Question 23

same as moderate but with force or weight; head stretched forward
- what intensity score for the neck

Answer 23

heavy - 3

Question 24

what did the MFA determine is the best way to reduce muscular fatigue in the example

Answer 24

reducing the need for repetitive forceful pushes at full extensions