- Dec 2017
-
citeseerx.ist.psu.edu citeseerx.ist.psu.edu
-
There are several limitations to this studythat should be noted.
I've been waiting on the variables that exist among the study, but I didn't think of the two dimensional nature of it.
-
Adopting a slower walking speed may also have energy-expenditure benefits, because slower walking speedsexpend more energy per unit distance than walking at anormal speed (
This is not what I expected, I always thought faster was better.
-
Mean step width at midstance for the obese vs normal-weight subjects. Step width was significantly greater for the obesesubjects at all speeds except 1.25 mIsj1and was similar across walkingspeeds. *PG0.0083 for obese vs normal-weight subjects at each speed.
That's something I expected.
-
Angular joint kinematics were similar between the obeseand normal-weight groups (Table 4, Fig. 2). Midstance hip-,knee-, and ankle-joint angles were not different (P=0.41,0.61, and 0.86, respectively) between the groups across allwalking speeds.
It is interesting that the article keeps mentioning the p-value for the result, but it doesn't indicate the t value.
-
At each walking speed, peak vertical GRF wereapproximately 60% greater for the obese versus normal-weight subjects (PG0.001). Scaled to body weight, peakvertical GRF were significantly smaller for the obesesubjects versus normal-weight subjects at 1.00 mIs
The results make the statement that there was a significant difference that exists between the obese and healthy weight adult and it stated explicitly in what direction and by how much.
-
Thus, the level of significance forthe Student`st-tests was set at 0.0083
I was confused by the term students t-test, I've never heard the referred to that term.
-
A two-factor (obesity and speed)ANOVA with repeated measures determined how obesityand walking speed affected peak GRF, temporal gaitcharacteristics, midstance lower-extremity joint angles, peaknet muscle moments, and peak external knee adductionmoment.
It is interesting the study used a two-factor (obesity and speed) ANOVA with repeated measures, which allows the administrator to measure how obesity and speed affect multiple things.
-
During each trial, subjectswalked with the right leg on the right treadmill and the leftleg on the left treadmill for 2 min, followed by 2 min ofwalking with both feet on the right treadmill.
I thought it was fascinating that the experiment instructed the participants to walk with the right leg on the right treadmill and the left leg on the left treadmill, and then they walked with both feet on the right treadmill.
-
First, we familiarized the subjects to the treadmill byhaving them walk for at least 10 min at a comfortablewalking speed. The familiarization was followed by theexperimental trials
It was good that the administers had a familiarization phase of the trail first before experimenting, I believe it may lessen the amount of variability in the analysis.
-
ubjects gavewritten informed consent that followed the guidelines of theUniversity of Colorado Human Research Committee.
Other than the written consent how did they know the participants regularly maintained their body mass for three months.
-
Two groups of young adults volunteered forthis study: obese (N= 10; five females and five males) andnormal-weight (N= 10; five females and five males).
I liked that the study had an equal amount of participants that were tested obese adults versus healthy weight participants. It also studied men and women.
-
However, no study has comprehensively examinedthe relationship between walking speed and lower-extremityjoint loads in obese versus normal-weight adults.
I think it would have been helpful to have studies to honestly measure the connection between walking speed and lower-extremity joint loads in obese versus normal-weight adults.
-
Walking at slower speeds may be an effective way toreduce knee-joint loads in obese adults. Previous studieshave shown that in normal-weight subjects, GRF and lower-extremity net muscle moments are smaller at slowerwalking speeds (21,40).
I guess I understand the point they are trying to make that the obese adults walk slower to reduce the extra force required to carry around their weight.
-
found that the absolute peakknee moments when walking at 1.5 mIsj
I think this sentence is confusing when it mentions the knee moments.
-
class II and III obese adults
Maybe it would be helpful if it mentioned what the differences that exist among the classes of obesity.
-
study provided no information about the GRF of non-arthritic obese adults walking at a normal walking speed.
I think the study should have included information about the GRF of non-arthritic obese adults walking at a normal walking speed.
-
Absolute peak anteroposterior and mediolateralGRF also increased proportionally with body weight.
This sentence is interesting because it mentions the anatomical positions of the body, anteroposterior and mediolateral, but maybe it would be helpful to tell with positions they are talking about because everyone might not know.
-
Messier et al. (25) provide the only published reports ofground-reaction forces (GRF) for obese adults walking.Absolute peak vertical GRF increased in almost directproportion with body weight.
When I was beginning bio mechanics, I thought I was never going to have to see some the terms again and if they were so important why I am I just seeing them now. Well, I was wrong the ground reaction force (GRF) explains with every force applied to the ground there is an equal opposite force push back. It could be used to describe how much force is needed to walk.
-
Spyropoulos et al. (35) compared stride and jointangle differences between obese and normal-weight men.They reported that the obese males walked slower (1.09mIsj1) with wider steps and similar knee flexion atmidstance compared with their faster-walking (1.64 mIsj1)normal-weight counterparts,
This semester in bio mechanics we were taught how to calculate joint angles also known as relative angles, and I learned the importance of the joint angles and how they were used to tell a story about your body. For instance, these angles were used to illustrate the differences that exist among the obese and healthy weight men.
-
ntuitively, it would seem likely that obesitygreatly increases the biomechanical loads involved inwalking and that these loads increase with walking speed.If so, the common prescription of brisk walking as exercisefor treating obesity (28) may inadvertently increase the riskof musculoskeletal pathology
I think this was a fascinating point to make because every older adult that I ask if they are involved in physical activity, their first response was they are walking. They are involved in something that prescribed to help with one epidemic that could cause problems somewhere else.
-