PROGRESSIVE QUADRICEPS FEMORIS MUSCLE FATIGUE DURING CONSTANT WORK RATE DYNAMIC EXERCISE

1995 ◽  
Vol 27 (Supplement) ◽  
pp. S79
Author(s):  
S. F. Lewis ◽  
C. S. Fulco ◽  
P. Frykman ◽  
R. Boushel ◽  
S. Smith ◽  
...  
Keyword(s):  
Muscle Fatigue ◽  
Quadriceps Femoris ◽  
Work Rate ◽  
Dynamic Exercise ◽  
Quadriceps Femoris Muscle ◽  
Constant Work Rate ◽  
Rate Dynamic ◽  
Femoris Muscle

Muscle fatigue and exhaustion during dynamic leg exercise in normoxia and hypobaric hypoxia

1996 ◽  
Vol 81 (5) ◽  
pp. 1891-1900 ◽  
Author(s):  
Charles S. Fulco ◽  
Steven F. Lewis ◽  
Peter N. Frykman ◽  
Robert Boushel ◽  
Sinclair Smith ◽  
...  
Keyword(s):  
Muscle Fatigue ◽  
Hypobaric Hypoxia ◽  
Knee Extension ◽  
Work Rate ◽  
Dynamic Exercise ◽  
Time To Exhaustion ◽  
Electromyographic Activity ◽  
Constant Work Rate ◽  
Generating Capacity ◽  
Leg Exercise

Fulco, Charles S., Steven F. Lewis, Peter N. Frykman, Robert Boushel, Sinclair Smith, Everett A. Harman, Allen Cymerman, and Kent B. Pandolf. Muscle fatigue and exhaustion during dynamic leg exercise in normoxia and hypobaric hypoxia. J. Appl. Physiol. 81(5): 1891–1900, 1996.—Using an exercise device that integrates maximal voluntary static contraction (MVC) of knee extensor muscles with dynamic knee extension, we compared progressive muscle fatigue, i.e., rate of decline in force-generating capacity, in normoxia (758 Torr) and hypobaric hypoxia (464 Torr). Eight healthy men performed exhaustive constant work rate knee extension (21 ± 3 W, 79 ± 2 and 87 ± 2% of 1-leg knee extension O2 peak uptake for normoxia and hypobaria, respectively) from knee angles of 90–150° at a rate of 1 Hz. MVC (90° knee angle) was performed before dynamic exercise and during ≤5-s pauses every 2 min of dynamic exercise. MVC force was 578 ± 29 N in normoxia and 569 ± 29 N in hypobaria before exercise and fell, at exhaustion, to similar levels (265 ± 10 and 284 ± 20 N for normoxia and hypobaria, respectively; P > 0.05) that were higher ( P < 0.01) than peak force of constant work rate knee extension (98 ± 10 N, 18 ± 3% of MVC). Time to exhaustion was 56% shorter for hypobaria than for normoxia (19 ± 5 vs. 43 ± 7 min, respectively; P < 0.01), and rate of right leg MVC fall was nearly twofold greater for hypobaria than for normoxia (mean slope = −22.3 vs. −11.9 N/min, respectively; P < 0.05). With increasing duration of dynamic exercise for normoxia and hypobaria, integrated electromyographic activity during MVC fell progressively with MVC force, implying attenuated maximal muscle excitation. Exhaustion, per se, was postulated to relate more closely to impaired shortening velocity than to failure of force-generating capacity.

Muscle use during dynamic knee extension: implication for perfusion and metabolism

1998 ◽  
Vol 85 (3) ◽  
pp. 1194-1197 ◽  
Author(s):  
Chester A. Ray ◽  
Gary A. Dudley
Keyword(s):  
Blood Flow ◽  
Muscle Mass ◽  
Muscle Blood Flow ◽  
Knee Extension ◽  
Magnetic Resonance Images ◽  
Quadriceps Femoris ◽  
Work Rate ◽  
Quadriceps Femoris Muscle ◽  
Total Muscle ◽  
Femoris Muscle

Dynamic one-legged knee extension (DKE) is commonly used to examine physiological responses to “aerobic” exercise. Muscle blood flow during DKE is often expressed relative to quadriceps femoris muscle mass irrespective of work rate. This is contrary to the notion that increased force is achieved by recruitment in large muscles. The purpose of this study, therefore, was to determine muscle use during DKE. Six subjects had magnetic resonance images taken of their quadriceps femoris before and after 4 min of DKE at 20 and 40 W. Muscle use was determined by shifts in T2. The cross-sectional area of quadriceps femoris that had an elevated T2 was 16 ± 1% (mean ± SE) preexercise, and 54 ± 5 and 94 ± 4% after 20- and 40-W DKE, respectively. Volume of quadriceps femoris increased 11.4 ± 0.2% ( P = 0.006), from 2,230 ± 233 cm3before exercise to 2,473 ± 232 cm3 after 40-W DKE. Extrapolation of these data indicates that 1,301 ± 111 cm3 of quadriceps femoris were engaged during 20-W DKE compared with 2,292 ± 154 cm3 during 40-W DKE. By using muscle blood flow data for submaximal DKE at 20 W [P. Andersen and B. Saltin. J. Physiol. (Lond.)366: 233–249, 1985; and L. B. Rowell, B. Saltin, B. Kiens, and N. J. Christensen. Am. J. Physiol. 251 ( Heart Circ. Physiol. 20): H1038–H1044, 1986] and estimating muscle use in those studies from our data (total muscle mass × 0.54), extrapolated blood flow to active muscle (263 and 278 ml ⋅ min−1 ⋅ 100 g−1, respectively) is comparable to that obtained during peak aerobic DKE when expressed relative to total muscle mass (243 and 250 ml ⋅ min−1 ⋅ 100 g−1, respectively). These findings indicate that increased power during aerobic DKE is achieved by recruitment. Additionally, they suggest that blood flow to the active quadriceps femoris muscle does not increase with increases in submaximal work rate but instead is maximal to support aerobic metabolism. Thus increases in muscle blood flow are directed to newly recruited muscle, not to increased perfusion of muscle already engaged.

Quantitation of progressive muscle fatigue during dynamic leg exercise in humans

1995 ◽  
Vol 79 (6) ◽  
pp. 2154-2162 ◽  
Author(s):  
C. S. Fulco ◽  
S. F. Lewis ◽  
P. N. Frykman ◽  
R. Boushel ◽  
S. Smith ◽  
...  
Keyword(s):  
Muscle Fatigue ◽  
Biceps Femoris ◽  
Knee Extension ◽  
Quadriceps Femoris ◽  
Work Rate ◽  
Myoelectric Activity ◽  
Work Intensity ◽  
O2 Uptake ◽  
Constant Work Rate ◽  
Leg Exercise

There is virtually no published information on muscle fatigue, defined as a gradual decline in force-generating capacity, during conventional dynamic (D) leg exercise. To quantitate progression of fatigue, we developed 1) a model featuring integration of maximal voluntary static contraction (MVC) of knee extension (KE) muscles with ongoing DKE and 2) a device that allows frequent rapid transfer between DKE isolated to the quadriceps femoris muscles and measurement of KE MVC. Eight healthy men performed graded and submaximal constant work rate one-leg DKE to exhaustion while seated. Work rate, a product of a contraction rate (1 Hz), force measured at the ankle, and distance of ankle movement from 90 degrees to 150 degrees of KE, was precisely controlled. Lack of rise in myoelectric activity in biceps femoris of the active leg during DKE and MVC was consistent with restriction of muscle action to quadriceps femoris. The slope of the linear relationship between O2 uptake and work rate was 13.7 ml O2/W (r = 0.93). This slope and the increase of heart rate relative to increasing work intensity agreed with published values for D leg exercise. Test-retest values for O2 uptake were similar (P > 0.05) for matched DKE work rates. To track fatigue, MVC (90 degrees knee angle) was performed every 2 min of DKE. After 4 min of DKE at work rates corresponding to (mean +/- SE) 66 +/- 2, 78 +/- 2, and 100% of peak DKE O2 uptake, MVC fell to 95 +/- 3, 90 +/- 5, and 65 +/- 7%* of MVC of rested muscle, respectively (*P < 0.01 from previous work rates). Virtually identical declines in MVC were observed by the end of graded work rate DKE and submaximal constant work rate DKE tests. Quantitation of progressive muscle fatigue during D leg exercise provides a framework to study the effects of a variety of interventions on the fatigue process and may permit unique insights into the involved mechanisms.

Quadriceps Femoris Muscle Fatigue in Obese Adolescents and Adults

2006 ◽  
Vol 38 (Supplement) ◽  
pp. S89
Author(s):  
Nicola A. Maffiuletti ◽  
Marc Jubeau ◽  
Mario Bizzini ◽  
Urs Munzinger ◽  
Alessandro Sartorio
Keyword(s):  
Muscle Fatigue ◽  
Quadriceps Femoris ◽  
Quadriceps Femoris Muscle ◽  
Obese Adolescents ◽  
Adolescents And Adults ◽  
Femoris Muscle

scholarly journals Evaluation of Gait Speed after Applying Kinesio Tape on Quadriceps Femoris Muscle in Patients with Knee Osteoarthritis

2018 ◽  
Vol 6 (8) ◽  
pp. 1394-1398 ◽  
Author(s):  
Klejda Tani ◽  
Irena Kola ◽  
Vjollca Shpata ◽  
Fregen Dhamaj
Keyword(s):  
Knee Osteoarthritis ◽  
Clinical Diagnosis ◽  
Gait Speed ◽  
Quadriceps Femoris ◽  
Walk Test ◽  
Kinesio Tape ◽  
Quadriceps Femoris Muscle ◽  
Increased Risk ◽  
Femoris Muscle ◽  
10 Meter Walk Test

BACKGROUND: Knee osteoarthritis is a chronic degenerative disease, known as the most common cause of difficulty walking in older adults and subsequently is associated with slow walking. Functional decline, increased risk of falls and the presence of pain are, in many studies, related to the muscle weakness caused by osteoarthritis especially weakness of the quadriceps muscles. Many studies have shown that the strength of the quadriceps femoris muscle can affect gait, by improving or weakening it. Kinesio Tape is a physiotherapeutic technique, which reduces pain and increases muscular strength by irritating the skin receptors.AIM: This study aimed to verify if the application of Kinesio Tape on quadriceps femoris muscle increases gait speed while decreasing the time needed to accomplish the 10-meter walk test in patients with knee osteoarthritis and also in subjects without knee osteoarthritis.METHOD: In this study, we observed the change of gait speed with the help of the 10-meter walk test before, one day and three days after the application of Kinesio Tape in quadriceps femoris muscle. We compared the results of the time needed to perform the 10-meter walk in two groups. In the first group, the Patients group, participated 102 out-patients with a clinical diagnosis of primary knee osteoarthritis, while in the second group, the Control group, participated 73 subjects with a main excluding criterion a clinical diagnosis of primary knee osteoarthritis.RESULTS: Our results indicated that there was a significant decrease of time needed to perform the 10-meter walk test in both groups three days after application of Kinesio Tape on quadriceps femoris muscle. However, there was not a significant change one day after the application of Kinesio Tape compared before its application in both groups.CONCLUSIONS: Our results indicated that there was a significant decrease in time needed to accomplish the 10-meter walk test. Kinesio Tape is a technique that can be used especially when changing walking stereotypes is a long-term goal of the treatment.

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