Assessment of Isokinetic Muscle Strength in Women Who Are Obese

Hulens, Mieke; Vansant, Greet; Lysens, Roeland; Claessens, Albrecht; Muls, Erik

doi:10.2519/jospt.2002.32.7.347

Cited by 38 publications

(37 citation statements)

References 47 publications

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“…Therefore, a gravity correction was performed using 63% of body weight to calculate the Gravity Effect Torque (GET). 2,27 The isokinetic dynamometer Cybex TORSO unit was used to measure trunk left ± right rotation strength of the oblique abdominal muscles. In this test, there is no contribution of gravity.…”

Section: Methodsmentioning

confidence: 99%

“…However, methodological problems to accurately measure these muscle performances exist. 2 First, correction for the effect of gravity is dif®cult to perform, as a protocol to accurately weigh the trunk has not been described in the literature yet. Moreover, inertia to overcome the weight of the trunk when accelerating is larger in obese subjects.…”

Section: Hand Grip Strengthmentioning

confidence: 99%

“…This is partly due to the several methodological issues that exist in measuring muscle strength in an obese population. 2 Several conditions may affect muscle strength in obesity. First, body weight, and consequently fat-free mass (FFM), is increased when compared to lean subjects.…”

Section: Introductionmentioning

confidence: 99%

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Study of differences in peripheral muscle strength of lean versus obese women: an allometric approach

et al. 2001

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OBJECTIVE: To investigate whether peripheral muscle strength is signi®cantly different between lean and obese women controlled for age and physical activity, using an allometric approach. DESIGN: Cross-sectional study of isometric handgrip and isokinetic leg and trunk muscle strength. SUBJECTS: 173 obese (age 39.9 AE 11.4 y, body mass index (BMI) 37.8 AE 5.3 kgam 2 ) and 80 lean (age 39.7 AE 12.2 y, BMI 22.0 AE 2.2 kgam 2 ) women. MEASUREMENTS: Anthropometric measures (weight, height) and body composition (bioelectrical impedance method), isometric handgrip (maximal voluntary contraction on the Jamar dynamometer), isokinetic trunk¯exion ± extension, trunk rotation, and knee¯exion ± extension (Cybex dynamometers). RESULTS: Absolute isokinetic strength output (that is, strength uncorrected for fat-free mass) was larger in obese compared to lean women, except for knee¯exion and isometric handgrip, which were not signi®cantly different (P b 0.05). Pearson correlation coef®cients between strength measures and fat-free mass (kg) were low to moderate both in lean (r 0.28 ± 0.53, P`0.05) and in obese (r 0.29 ± 0.49, P`0.001) women. There was no correlation with fat mass (kg) in the lean, whereas in the obese women a weak positive relation could be observed for most isokinetic data (r 0.21 ± 0.39, P`0.01). When correcting for fat-free mass (raised to the optimal exponent determined by allometric scaling), all strength measurements were at least 6% lower in obese when compared to the lean women, except for trunk¯exion, which was at least 8% stronger in obese women. DISCUSSION: The higher absolute knee extension strength measures of leg and the similar extension strength of the trunk in the obese sample compared to the lean might be explained by the training effect of weight bearing and support of a larger body mass. However when the independent effect of fat-free mass is removed, these strength measures, as well as oblique abdominal muscle and handgrip strength, turned out to be lower in obese women. These observations could be the re¯ection of the overall impairment of physical ®tness as a consequence of obesity and its metabolic complications.

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Section: Methodsmentioning

confidence: 99%

Section: Hand Grip Strengthmentioning

confidence: 99%

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Study of differences in peripheral muscle strength of lean versus obese women: an allometric approach

et al. 2001

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“…Do dat ko wo zmniej sze nie ak tyw no ści ru cho wej i ob ni że nie zdol no ści wy sił ko wej, ja kie dość czę sto wy stę pu je po le cze niu no wo two rów zło śli wych, może po wo do wać wzrost ma sy cia ła. W kon se kwen cji na si le niu mo gą ulec do le gli wo ści bó lo we krę go słu -pa, któ re z ko lei mo gą pro wa dzić do dal szych zmian: za prze sta nia ćwi czeń ru cho wych i ko lej ne go po głę -bia nia nie ko rzyst nych zmian w ob rę bie krę go słu pa wy ni ka ją cych z aki ne zy [10][11][12]. Za da niem fi zjo te rapii jest prze rwa nie te go "błęd ne go ko ła".…”

Section: Wstępunclassified

“…As a consequence, back pain may become more severe, which, in turn, may lead to further changes -abandoning the exercise programme and even greater progression of unfavourable changes within the spine as a result of restricted movements [10][11][12]. Physiotherapy aims to stop this vicious circle.…”

Section: Introductionmentioning

confidence: 99%

Body posture and trunk muscle activity in women following treatment of breast cancer

Hanuszkiewicz

Malicka²,

Stefańska³

et al. 2011

Ortopedia, traumatologia, rehabilitacja

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Wstęp. Le cze nie ra ka pier si mo że po wo do wać nie pra wi dło we ukształ to wa nie krzy wizn przed nio-tyl nych krę go słu pa, co w kon se kwen cji pro wa dzi do za bu rzeń czyn no ścio wych mię śni tu ło wia. Ce lem pra cy by ło okre śle nie za le żno ści po mię dzy czyn no ścią mię śni tu ło wia a ty pem po sta wy cia ła ko biet le czo nych z po wo du ra ka pier si.Ma te riał i me to dy. 50 ko biet po le cze niu ra ka pier si. Śred ni wiek ba da nych wy niósł 61 la ta (±8,67), śred nia wy so kość cia ła 157,5 cm (±5,49) i śred nia ma sa cia ła 74 kg (±13,10). U 84% ba da nych prze pro wa dzo no zmo dy fi ko wa ną ra dy kal ną ma stek to mię, na to miast u 16% -za bieg oszczę dza ją cy. Śred ni czas od za bie gu chi rur gicz ne go wy niósł 6,4 ro ku (±5,15). Do dat ko wo 90% ko biet zo sta ło pod da nych le cze niu uzu peł nia ją ce mu. U wszyst kich ba da nych wy ko na no po miar pa ra metrów si ło wo-pręd ko ścio wych mię śni zgi na czy i pro stow ni ków tu ło wia przy pręd ko ściach ką to wych ru chu 60°/s i 120°/s na stano wi sku do ba dań izo ki ne tycz nych oraz fo to gra me trycz ną oce nę krzy wizn przed nio-tyl nych krę go słu pa. Na pod sta wie wielko ści wskaź ni ka kom pen sa cji (µ) ba da ną gru pę po dzie lo no na 3 pod gru py po sta wy cia ła: ki fo tycz ną (K), lor do tycz ną (L) i rów no wa żną (R).Wy ni ki. 40% (20 ko biet) ba da nych ce cho wa ła po sta wa rów no wa żna -o jed na ko wo za zna czo nych krzy wi znach piersio wej i lę dźwio wej, 30% (15 ko biet) ki fo tycz na -o prze wa dze krzy wi zny ki fo tycz nej nad lor do tycz ną, na to miast 30% lor do tycz na (15 ko biet) -o prze wa dze krzy wi zny lor do tycz nej nad ki fo tycz ną. Ko bie ty o lor do tycz nej po sta wie cia ła osią -gnę ły naj wy ższe war to ści ko re la cji po mię dzy czyn no ścią mię śni tu ło wia przy ob cią że niu 60°/s i 120°/s a po sta wą cia ła w płasz czyź nie strzał ko wej, z ko lei zni ko me ko re la cje od no to wa no w przy pad ku gru py ko biet o rów no wa żnej syl wet ce.Wnio ski. 1. Naj więk sze za an ga żo wa nie mię śni tu ło wia wy ka za no w przy pad ku po sta wy lor do tycz nej. 2. Po sta wa rów no wa żna nie wy ka za ła związ ków czyn no ści mię śni i pa ra me trów cha rak te ry zu ją cych tę po sta wę.Sło wa klu czo we: rak pier si, dy na mo me tria czyn no ścio wa, po sta wa cia ła, tu łów SUM MA RY Back gro und. Tre at ment of bre ast can cer can le ad to ab nor mal ly sha ped an te ro po ste rior spi nal cu rva tu res, which conse qu en tly le ads to func tio nal di stur ban ces of trunk mu sc les. The aim of the pa per was to in ve sti ga te the cor re la tion be tween trunk mu sc le func tion and ty pe of bo dy po stu re in wo men re ce iving tre at ment for bre ast can cer.Ma te rial and me thods. Fi fty wo men fol lo wing tre at ment of bre ast can cer we re in c lu ded in the stu dy. The ave ra ge age of the wo men was 61 years (±8.67), ave ra ge bo dy he ight was 157.5 cm (±5.49) and ave ra ge bo dy we ight was 74 kg (±13.10). 84% of the wo men un der went a mo di fied ra di cal ma ste...

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Differences in quadriceps muscle strength and fatigue between lean and obese subjects

et al. 2007

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The present study aimed to compare quadriceps femoris muscle strength and fatigue between obese (grade II and III) and nonobese adults. Ten obese (mean age: 25 years; mean BMI: 41 kg/m(2)) and ten lean (mean age: 27 years; mean BMI: 23 kg/m(2)) men were tested. Quadriceps muscle fatigue was quantified as the (percent) torque loss during a voluntary isokinetic (50 maximal contractions at 180 degrees /s) and an electrostimulated (40 Hz) isometric protocol (5 min, 10% of the maximal torque). Maximal voluntary isometric and isokinetic torque and power were also measured. Voluntary torque loss was significantly higher (P < 0.05) in obese (-63.5%) than in lean subjects (-50.6%). Stimulated torque decreased significantly (P < 0.05) but equally in the two subject groups. Obese subjects displayed higher absolute (+20%; P < 0.01) but lower relative (i.e., normalized to body mass) (-32%; P < 0.001) muscle torque and power than their lean counterparts. Obese individuals demonstrated lower fatigue resistance during voluntary but not during stimulated knee extensions compared to their nonobese counterparts. Peripheral mechanisms of muscle fatigue -- at least those associated to the present stimulated test -- were not influenced by obesity. The observed quadriceps muscle function impairments (voluntary fatigue and relative strength) probably contribute to the reduced functional capacity of obese subjects during daily living activities.

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Assessment of Isokinetic Muscle Strength in Women Who Are Obese

Cited by 38 publications

References 47 publications

Study of differences in peripheral muscle strength of lean versus obese women: an allometric approach

Study of differences in peripheral muscle strength of lean versus obese women: an allometric approach

Body posture and trunk muscle activity in women following treatment of breast cancer

Differences in quadriceps muscle strength and fatigue between lean and obese subjects

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