Use Of Brzycki, Epley, And Lander Formulas
Objectives: Measure chest press 1 repetition maximum (RM) through the use of the Brzycki, Epley, and Lander equations
Equations:
Brzycki: 1 RM= w/(102.78-(2.78 ∙ # reps)) Epley: 1RM= (1+0.333∙# reps)∙w Lander: 1 RM= (100 ∙ w)/((101.3-2.67123 ∙ # reps)) Determine achieved chest press 1 RM Compare the two values Which is more valid? Discuss importance of determining 1 RM Who does this benefit most?
Introduction: Muscular strength estimation is an important measurement because it can allow a professional to determine where to start when conducting an actual 1 RM test or a predicted 1 RM test, depending on the patient’s condition1. If it is determined that the client can preform the actual 1 RM test, it is important to go over the proper …show more content…
LeSuer and his colleagues, and evaluated the accuracy of seven prediction equations, but only three equations were used for this lab.2 Each of the formulas for predicting maximum bench press performance significantly underestimated the achieved 1 RM performance. The average achieved bench press 1 RM value was 137.0 lbs. The Brzycki equation estimated the average 1 RM would be 131.9 lbs, with a 4.00% discrepancy. The Lander equation estimated a 133.0 lb average 1 RM, with a 3.00% discrepancy. The Epley equation gave the most accurate 1 RM prediction of the three equations, having a 1.00% difference between the predicted, 135.1lbs and the actual …show more content…
Therefore, the results of this study suggest that the 1 RM prediction, using the Brzycki’s equation can be used reliably to measure muscle strength, exclusively in type II diabetic patients4.
To further test the reliability of the prediction equations, our own subject performed the 1 RM test following the procedure listed in the methods. They first used the three prediction equations to estimate their 1 RM, and then they performed an actual 1 RM on the bench press.
The subject’s achieved 1 RM was 110-lbs. Using the Brzycki equation, the predicted 1 RM was 106.7-lbs, resulting in a 3.0% discrepancy between the achieved and predicted 1 RM. The Epley equation gave an estimate of 106.4-lbs, giving a 3.3% discrepancy. The Lander equation was the most reliable and estimated the 1 RM to be 107.3-lbs, resulting in a 2.5% discrepancy. The data suggests that the three prediction equations are reliable for finding a 1 RM estimate because the discrepancies between the achieved and predicted 1 RM ranged from 2.5-3.3%, and all estimated value underestimated the actual value.
Equations:
Brzycki: 1 RM= w/(102.78-(2.78 ∙ # reps)) Epley: 1RM= (1+0.333∙# reps)∙w Lander: 1 RM= (100 ∙ w)/((101.3-2.67123 ∙ # reps)) Determine achieved chest press 1 RM Compare the two values Which is more valid? Discuss importance of determining 1 RM Who does this benefit most?
Introduction: Muscular strength estimation is an important measurement because it can allow a professional to determine where to start when conducting an actual 1 RM test or a predicted 1 RM test, depending on the patient’s condition1. If it is determined that the client can preform the actual 1 RM test, it is important to go over the proper …show more content…
LeSuer and his colleagues, and evaluated the accuracy of seven prediction equations, but only three equations were used for this lab.2 Each of the formulas for predicting maximum bench press performance significantly underestimated the achieved 1 RM performance. The average achieved bench press 1 RM value was 137.0 lbs. The Brzycki equation estimated the average 1 RM would be 131.9 lbs, with a 4.00% discrepancy. The Lander equation estimated a 133.0 lb average 1 RM, with a 3.00% discrepancy. The Epley equation gave the most accurate 1 RM prediction of the three equations, having a 1.00% difference between the predicted, 135.1lbs and the actual …show more content…
Therefore, the results of this study suggest that the 1 RM prediction, using the Brzycki’s equation can be used reliably to measure muscle strength, exclusively in type II diabetic patients4.
To further test the reliability of the prediction equations, our own subject performed the 1 RM test following the procedure listed in the methods. They first used the three prediction equations to estimate their 1 RM, and then they performed an actual 1 RM on the bench press.
The subject’s achieved 1 RM was 110-lbs. Using the Brzycki equation, the predicted 1 RM was 106.7-lbs, resulting in a 3.0% discrepancy between the achieved and predicted 1 RM. The Epley equation gave an estimate of 106.4-lbs, giving a 3.3% discrepancy. The Lander equation was the most reliable and estimated the 1 RM to be 107.3-lbs, resulting in a 2.5% discrepancy. The data suggests that the three prediction equations are reliable for finding a 1 RM estimate because the discrepancies between the achieved and predicted 1 RM ranged from 2.5-3.3%, and all estimated value underestimated the actual value.