Muscle testing group presentation

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Education

Published on February 21, 2014

Author: YinglingV

Source: slideshare.net

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Muscle Strength Assessment

Muscle Strength Testing 1RM and 4-6 RM Testing Dinh Nguyen Michelle Rumpel Kristian Blanco

Muscular Strength • • • Ability of a muscle group to develop maximal contractile force against a resistance in a single contraction. Static strength = maximal force produced when limb is not moving Dynamic strength = maximal force produced in a single contraction at a specified velocity

Reasons for Testing Muscle Strength Establish baselines before training Monitor progress while training Assess effectiveness of programs In KRG- to have information to compare to the bone scanning data Diagnose Certain disorders/pathologies that may affect muscle strength or nerve damage causing muscles to not activating.

Ways to Test Muscle Strength Manual Muscle Tests Functional Performance Training Dynamometer- force exerted on machine measured in Kg and lbs 1 Rep Max- highest weight that one repetition of movement can be performed with proper form before muscle failure 4-6 Rep Max- highest weight that 4-6 repetitions of movement can be performed with proper form before muscle failure

Muscles used in Grip Strength

Muscles Used in Leg Extension Quadriceps: Rectus femoris Vastus Intermedius Vastus Medius Vastus Lateralis

Muscles Used in Leg Flexion Hamstrings: Biceps Femoris Semimebranosus Semitendinosus

Muscles Used in Plantar Flexion Gastocnemius Soleus Plantaris Flexor Hallucis Longus Flexor Digitorum Longus Tibialis Posterior

Muscles used in Dorsiflexion Tibialis Anterior Extensor Hallucis Longus Extensor Digitorum Longus Peroneus Tertius

Significance of Research 1 rep max is not always practical, especially with older patients Less chance of injury with a 4-6 rep max because of lower weight

Research Question Research Question- How accurate is the 4-6 rep max prediction equation in determining the actual 1 rep max?

Methodology 6 Participants: 4 Males and 2 Females Ages: 19 - 23 Activity Level: Active -Grip strength (Dynamometer) -Quads (Leg Extension Machine) 5 minute rest -Hamstring (Leg Curl Machine) 5 minute rest -Plantarflexion (Rotary Calf Machine)

Methodology For each 1 rep max test: 1. 8-10 reps of light weight for warm up and to gain proper form 2. 30 second rest 3. Increase weight and try 1 rep 4. Continue to increase weight until failure For each 4-6 rep max test: 1. 8-10 reps of light weight for warm up and to gain proper form 2. 30 second rest 3. Increase weight and and try 4-6 rep max 4. Continue to increase weight until failure

Assessment Tools Hand Dynamometer (Grip) Cybex leg extension machine→ quadriceps

Assessment Tools Cybex seated leg curl machine→ hamstrings Cybex rotary calf machine→ plantarflexion

Assessment Tools Handheld Dynamometer for Dorsiflexion and Plantar Flexion

Assessment Tools Cybex leg extension machine→ quadriceps Cybex seated leg curl machine→ hamstrings Cybex rotary calf machine→ plantarflexion Just learned we have a portable dynamometer

1 RM Prediction Equations

Results

Results

Results

Current Literature - LaSuer, D. et al. “The accuracy of Prediction Equations for Estimating 1-RM Performance in the Bench Press, Squat and Deadlift” (1997). - Dohoney, P. et al. “Prediction of One Repetition Maximum (1-RM) Strength from a 4-6 RM and a 7-10 RM Submaximal Strength Test in Healthy Young Adult Males” (2002).

Possible Errors in Procedure Rest Time/warm-ups Correct Form Reps until reaching max Practice Bias Order of testing No familiarization with equipment

Challenges Faced Getting in touch as a group Lack of time to meet up Time for preparation Time for conducting research Lack of equipment

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