The Effect of Measurement Time When Evaluating Static Muscle Endurance during Sustained Static Maximal Gripping

Yamaji, Shunsuke; Demura, Shinichi; Nagasawa, Yoshinori; Nakada, Masakatsu; Kitabayashi, Tamotsu

doi:10.2114/jpa.21.151

Cited by 26 publications

(39 citation statements)

References 13 publications

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“…There are many reports on muscle oxygenation kinetics during exercise with a constant workload method (De Blasi et al, 1993;Kahn et al, 1998;Hick et al, 2001;Yamaji et al, 2002). Although muscle oxygenation kinetics do not evaluate strictly the increase and decrease of blood volume, they give an indication of the relative change in oxygen delivery and consumption by muscle blood volume (Kuwamori et al, 1995 Nakada et al (2004) reported that the properties of grip force in the initial phase during maximal repeated gripping were similar to those of sustained force exertion in a constant workload.…”

Section: Introductionmentioning

confidence: 99%

Relationships between Force and Muscle Oxygenation Kinetics during Sustained Static Gripping using a Progressive Workload

Demura

Nakada

2009

J Physiol Anthropol

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This study aimed to examine the relationships between force and subjective muscle-fatigue sensation (SMS), and muscle oxygenation kinetics during sustained static gripping using a progressive workload. Subjects consisted of 10 males (height 173.2Ϯ7.1 cm, body weight 70.3Ϯ15.1 kg, and age 21.1Ϯ1.5 years). They performed sustained static gripping with 7 gradually increasing relative demand values of 20% to 80% maximal voluntary contraction (MVC). The staging of the progressive workload was 10 s for 20% MVC, 20 s each for 30, 40, 50, 60, and 70% MVC, and 10 s for 80% MVC. Borg's SMS was used to measure the fatigue sensation of the antebrachial region in a pre-test and every 10 s during the test. The time to reach minimum Oxy-Hb/Mb appeared at about 50 s (52.6Ϯ25.2 s) after the onset of sustained static gripping, and the time to reach maximum Deoxy-Hb/Mb occurred later at 90 s. Significant and high correlations (rϭ0.632-0.721) were found between the time to reach maximum Deoxy-Hb/Mb, and Peak Force Time and Average Force. Even though the demand values caused a workload increase and reached 50% MVC, the change of Total Hb/Mb and Oxy-Hb/Mb kinetics was relatively small. Therefore, the effect caused by an obstruction of blood volume may not occur during the progressive workload. It was determined that the contraction time after the peak of SMS is relatively short and an individual difference in force value expands in the phase where SMS reaches its peak.

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Section: Introductionmentioning

confidence: 99%

Relationships between Force and Muscle Oxygenation Kinetics during Sustained Static Gripping using a Progressive Workload

Demura

Nakada

2009

J Physiol Anthropol

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“…Hence, individual differences in muscle endurance may be measured by lightening the physical burden in the progres- sive workload, as compared to the constant workload. Yamaji et al (2002) examined the effect of psychological factors during sustained static gripping by maximal voluntary contraction at different measurement times (1, 3, and 6 min), and reported that the subjects tend to hold the force value for the first 1 min. He also noted the influence of psychological factors such as muscle pain and its association with force exertion is large.…”

Section: Discussionmentioning

confidence: 99%

“…It was reported that the persistence time of sustained gripping is very short at levels above 75% MVC, with little difference among individuals (West et al 1995;Nagasawa et al 2000), while the load that could be maintained under sustained gripping without a force decrease is 15% MVC (Yamaji et al 2002). Therefore, the maximum and minimum increase .…”

Section: Setting Of Progressive Workloads and Measurement Timementioning

confidence: 98%

“…Also, the differences among individuals (Yamaji et al 2002;Yamaji et al 2004) and between genders (Maughan et al 1986;Laforest et al 1990) increase during a large decrease in force, until reaching a steady state. However, because measurement of muscle endurance using a progressive workload is without precedent, the effect of decreasing force is not entirely clear.…”

Section: Setting Of Progressive Workloads and Measurement Timementioning

confidence: 99%

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Gender Difference in Subjective Muscle-fatigue Sensation during Sustained Muscle Force Exertion

Demura

Nakada

Nagasawa

2008

Tohoku J. Exp. Med.

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Muscle endurance is one of the important composite factors to health-related physical fitness. However, previous measurement techniques for evaluation of isometric muscle endurance have been problematic, including rapid increase of blood pressure and heart rate. The progressive workload method which gradually increases the load can reduce subject's physical and mental burden and is safe even for the elderly. This study aims to examine the relationship between exerted force and subjective muscle-fatigue sensation (SMS) of the antebrachial region as well as differences with respect to gender during sustained static gripping. Subjects consisted of 12 males (age 20.8 ± 1.6 years) and 15 females (age 20.5 ± 1.3 years) with no history of neuromuscular disorders. They performed sustained static gripping, in which the demand values are gradually increased: 10 sec for 20% maximal voluntary contraction (MVC), 20 sec each for 30, 40, 50, 60, and 70% MVC, and 10 sec for 80% MVC. Demand values (each %MVC) were determined based on each subject's MVC. The forces exerted during at the demand values of 70-80% MVC were significantly lower in males than in females. A gender difference in SMS between male and female subjects occurred at demand values of 40-60% MVC. In short, even when maintaining the same exertion force during demand values of 40-60% MVC, males may experience greater physical fatigue than females. subjective musclefatigue sensation; gender difference; progressive workload. Tohoku

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“…Until now, studies on handgrip have been mainly performed by using the dominant hand (Demura et al, 1999;Nakada & Demura, 2013;Nakada et al, 2005;Yamaji et al, 2002;Yamaji et al, 2000). Meanwhile, a previous study examined the toes during bipedal walking (Hughes et al, 1990).…”

Section: Introductionmentioning

confidence: 99%

The Characteristics and Laterality of Explosive Force Exertion of Hand Grip and Toe Grip

Nakada¹,

Demura²

2014

APE

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This study examines the force exertion characteristics and laterality of maximal explosive force exertion of hand grip and toe grip. Fifteen male subjects, aged 19 to 23 years, performed maximal explosive hand grip and toe grip exertions with their dominant and non-dominant sides. Maximal force value and integral force for 2 sec in the hand grip exertions were significantly larger than those in the toe grip exertions in both the dominant and non-dominant sides. The time required to achieve 90% maximal force value in the hand grip exertions was significantly shorter than that in the toe grip exertions in both sides. Correlations between the dominant and non-dominant sides were significant (r = 0.710 -0.889) in maximal force value and integral force for 2 sec during the hand and toe grip exertions, but they were not significant (hand grip: r = 0.242, toe grip: r = 0.032) with respect to the time taken to achieve 90% maximal force value. In conclusion, a force exertion value increases more quickly in an explosive hand grip than that in an explosive toe grip. The laterality may relate to time parameters in both explosive force exertions, but not to ones related to force.

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The Effect of Measurement Time When Evaluating Static Muscle Endurance during Sustained Static Maximal Gripping

Cited by 26 publications

References 13 publications

Relationships between Force and Muscle Oxygenation Kinetics during Sustained Static Gripping using a Progressive Workload

Relationships between Force and Muscle Oxygenation Kinetics during Sustained Static Gripping using a Progressive Workload

Gender Difference in Subjective Muscle-fatigue Sensation during Sustained Muscle Force Exertion

The Characteristics and Laterality of Explosive Force Exertion of Hand Grip and Toe Grip

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