ASEP Procedures Recommendation I: Accurate Assessment of Muscular Strength and Power (original) (raw)

Reliability of an Isokinetic Test of Muscle Strength and Endurance 1

Journal of Orthopaedic & Sports Physical Therapy, 1989

The reliability of an isokinetic test of muscle strength and endurance was evaluated. Eleven males and 9 females underwent testing on three separate occasions, 2-4 days apart. The protocol included a velocity spectrum test (VST-5 repetitions at velocities ranging from 90-330°/sec) and a muscle endurance test (number of contractions performed in 45 sec at 180°/sec). In the VST, no significant within-subject test day differences were noted at any velocity. Reliability was generally higher at slower velocities and higher for knee extension than flexion. Mean intraclass correlation coefficients (ICCs) for peak torque across velocities were 0.88 for extension and 0.79 for flexion. For the endurance test, two reliable measures were total work performed and average power (ICCs = 0.92); relative endurance measures had ICCs of less than 0.80. Thresholds for demonstrating experimental effects and the number of subjects to test at different detection levels are-recommended.

Reliability of an Isokinetic Test of Muscle Strength and Endurance

Journal of Orthopaedic & Sports Physical Therapy, 1989

The reliability of an isokinetic test of muscle strength and endurance was evaluated. Eleven males and 9 females underwent testing on three separate occasions, 2-4 days apart. The protocol included a velocity spectrum test (VST-5 repetitions at velocities ranging from 90-330°/sec) and a muscle endurance test (number of contractions performed in 45 sec at 180°/sec). In the VST, no significant within-subject test day differences were noted at any velocity. Reliability was generally higher at slower velocities and higher for knee extension than flexion. Mean intraclass correlation coefficients (ICCs) for peak torque across velocities were 0.88 for extension and 0.79 for flexion. For the endurance test, two reliable measures were total work performed and average power (ICCs = 0.92); relative endurance measures had ICCs of less than 0.80. Thresholds for demonstrating experimental effects and the number of subjects to test at different detection levels are-recommended.

Procedures for Apparatus Muscle Testing - Essence and Performance

2019

The Muscle Test is an important tool for all healthcare team members who are committed to restoring the patient's physical health and a fundamental element in identifying motor disorders. The outcomes obtained from this test are the basis for choosing an optimal therapeutic approach, a strategy for rehabilitation and tracking of the recovery process in dynamics. The lack of objectivity and quantitative data for comparison in muscle strength measurement in manual testing creates prerequisites for inaccuracies and subjective judgment on the part of the examiner. This has given rise to the search for additional tools to support standard muscle assessment methods, such as apparatus muscle testing. It provides more accurate, quantitative and objective assessments and creates a prerequisite for refining the muscle test and preserving it in an electronic database accessible to a team of specialists.

On the assessment of lower-limb muscular power capability

Isokinetics and Exercise Science, 2003

This study assessed the reliability and validity of different methods used to estimate lower-limb muscular power capability based on mechanical variables. For this purpose, vertical jumping was compared with isokinetic knee extensions and with power tests used by practitioners. Methods: Four groups of subjects (N = 106) were tested in different conditions. Group-I performed countermovement vertical jumps (CMJ) on a force plate followed by left and right knee extensions on an isokinetic device at 120, 180 and 240 deg•s −1. Group-II performed CMJ trials followed by 20-m sprints, hand-reach jumps and 1RM leg-press testing. Group-III carried out squat jumps (SJ) in addition to CMJ trials. Finally, Group-IV performed the CMJ test and was retested twice after a short inter-session interval (1-4 days) and after a long one (4.5-5 months). The Pearson correlation was used to assess the validity and reliability of CMJ (p 0.01, **). Results: Mean peak power during CMJ was correlated with sprint time (r = −0.882 * *) and leg-press 1 RM (r = 0.797 * *), but less with peak hand-reach height (r = 0.695; p 0.05). Isokinetic knee extension power showed also a significant correlation with CMJ power, but its strength depended on the angular velocity (Isok-120 r = 0.702 * * ; Isok-180 r = 0.737 * * ; Isok-240 r = 0.599 * *). Test-retests showed a strong correlation after a short interval (r = 0.915 * *) and after a long one (r = 0.890 * *). Using the SJ technique did not have any effect on reliability (r = 0.914 * *). Conclusions: CMJ matches other methods used for testing lower-limb power capability. It is highly reliable and it allows a valid assessment of muscular power. Since CMJ is also simple and accurate to perform, it is the recommended method.

Considerations and Practical Options for Measuring Muscle Strength: A Narrative Review

BioMed Research International

Muscle strength impairments are related to mobility limitations and other untoward outcomes. This narrative review, therefore, describes considerations relative to the definition and measurement of muscle strength. Thereafter, practical options for measuring muscle strength are described and their clinimetric properties are delineated. Information provided herein may help students, clinicians, and researchers select the strength tests best suited to their research needs and limitations.

Test-retest reliability of an isokinetic muscle endurance test

Isokinetics and Exercise Science, 2002

The purpose of this study was to investigate the test-retest reliability of an isokinetic muscle endurance test. The right legs of twelve healthy males were tested on the Cybex Norm isokinetic dynamometer. The protocol consisted of 40 consecutive concentric knee extensions and flexions, performed maximally at an angular velocity of 120 • /s. The subjects performed the test twice, five days apart. Total work, endurance ratio, 50% fatigue work, 50% fatigue time and 50% fatigue repetitions were obtained. A one-way analysis of variance (ANOVA) with repeated measures was used to examine the differences between test and retest values. The reliability coefficient was also established using the ANOVA results. The results indicated that measurements demonstrated high reliability (r > 0.819). It could be concluded that the protocol used in the present study can be used to evaluate muscle endurance.

Development of a new isometric strength test using an isoinertial-based weight machine

Advances in Physiotherapy, 2010

cable tensiometer, force platform or similar device whose transducer measures the applied force (3). It is thus a laboratory-based method for evaluating maximal isometric muscle strength and usually requires sophisticated laboratory equipment and personnel trained in its use. The one-repetition maximum (1 RM) test, on the other hand, is regarded as the gold standard for assessing muscle strength in the clinical setting (4 -6). To our knowledge, there is no test to date that measures maximal isometric muscle strength in a non-laboratory location (such as in a gym or a sports medicine clinic); this would be of interest to exercise scientists and health professionals. Because of the current lack of options when it comes to isometric test methods that are clinically applicable, the fi rst aim of this study was to develop a new method of measuring maximal isometric muscle strength, using an isoinertial-based weight machine. Secondly, the aim was to investigate the reliability of the isometric muscle strength test and the dynamic 1 RM test and to describe the results in women and men.