-
Notifications
You must be signed in to change notification settings - Fork 2
Strength
The strength module contains equations for estimating strength in weightlifting exercises, estimating 1-repetition maximum values, and metrics for comparing weightlifting performances across weight classes, and genders.
A class for translating weightlifting performances between weight classes, and gender.
gender is either Fit.Gender.Male or Fit.Gender.Female
dob is a Date
weight is a number measured in kilograms
weightLifted given in kilograms
The Siff Bodymass Adjustment formula for normalizing weightlifting amount based on body weight
http://tsampa.org/training/scripts/siff/ http://dziepak.freeiz.com/training/formulas.htm Siff, Mel C. & Verkhoshansky "Supertraining" 1998, Ch 3.3.
http://dziepak.freeiz.com/training/formulas.htm Siff, Mel C. & Verkhoshansky "Supertraining" 1998, Ch 3.3.
A shortcut formula for using the siffWeight method or the siffPower method
http://dziepak.freeiz.com/training/formulas.htm Siff, Mel C. & Verkhoshansky "Supertraining" 1998, Ch 3.3.
The Sinclair Coefficients for comparing performances across weight classes in Olympic weightlifting. The formula can also be used to compare male and female performances.
- no bias for men's or women's benchpress and total
- a favorable bias toward intermediate weight class lifters in the women's squat with no bias for men's squat
- a linear unfavorable bias toward heavier men and women in the deadlift
Validation of the Wilks power-lifting formula http://europepmc.org/abstract/med/10613442
https://en.wikipedia.org/wiki/Sinclair_Coefficients
The Wilks Coefficient to measure the strength of a powerlifters while normalizing for the body mass of the lifters. This formula is considered to be the sucessor of the O'Carroll and Schwartz formulas. The formula was written by Robert Wilks,the CEO of Powerlifting Australia.
weight is a number measured in kilograms
height is a number measured in meters
The Bosco repeated vertical jump test for average power measurement in Watts. Units are:
- test duration (seconds)
- jump count (# of jumps)
- flight time (seconds)
Power (watts) = (flight_time * test_duration * 9.81^2) / 4 * jump_count * (test_duration - flight_time)
Bosco C, Luhtanen P, Komi PV (1983) A simple method for measurement of mechanical power in jumping. European Journal of Applied Physiology 50:273-282.
The Lewis formula for estimating average power in Watts. Jump reach score is measured in meters (m).
FOX, E.L. and MATHEWS, D.K. (1974) The interval training: conditioning for sports and general fitness. Philadelphia PA: Saunders. p. 257-258
The Harman formula for peak and average power. The original equation uses centimeters for the jump height, but this function is written for meters (m).
HARMAN, E.A. et al. (1991) Estimation of Human Power Output From Vertical Jump. Journal of Applied Sport Science Research, 5(3), p. 116-120
The Johnson & Bahamonde test for the calculation of peak and average power. This equation.
JOHSON, D. L. and Bahamonde, R. (1996) Power Output Estimate in University Athletes. Journal of strength and Conditioning Research, 10(3), p. 161-166
The sayers formula estimates peak power output.
SAYERS, S. et al. (1999) Cross-validation of three jump power equations. Med Sci Sports Exerc, 31, p. 572
The Margaria-Kalamen power test measures peak power in the vertical jump.
verticalHeight given in meters
time given in seconds
MARGARIA, R. et al. (1996) Measurement of muscular power (anaerobic) in man. J. Appl. Physiol, 21, p. 1662�1664 KALAMEN, J. (1968) Measurement of maximum muscle power in man. Doctoral dissertation, Ohio State University, Columbus.
For predicting 1 repetition maximum(1-RM), a number of estimator classes are provided that each use a different equation for predicting 1-RM. Each of these classes are subclasses of RMEstimator and implement the same interface. Developers can change the equation for predicting 1-RM by changing the estimator class in their application rather than changing their application logic. Each class can be constructed by providing the reps parameter and can use the predict method, with a weight argument to return the 1-RM value (in kg).
Studied population was 30 college aged females. Performs best when reps range from 5-10.
reps is the given number of repetitions in the weightlifting performance
weight is the given weight in kilograms
Estimates the weight lifted for the number of reps based on the 1-RM argument. Equation is the same as that of the predict method.
rm is the 1-RM weight in kilograms
http://www.unm.edu/~rrobergs/478RMStrengthPrediction.pdf
reps is the given number of repetitions in the weightlifting performance
weight is the given weight in kilograms
Estimates the weight lifted for the number of reps based on the 1-RM argument. Equation is the same as that of the predict method.
BAECHLE, T.R. and EARLE, R.W. and WATHEN, D. (2000) Resistance training. In: BAECHLE, T.R. and EARLE, R.W., eds. Essentials of Strength Training and Conditioning. 2nd ed. Champaign, IL: Human Kinetics, p. 395-425
The Brzycki formula for estimating a 1-Repetition Maximum (1-RM). For repetitions less than 10, the Brzycki formula returns slightly higher estimated 1-RM than the Epley formula. The two formulas are identical at 10 repetitions.
reps is the given number of repetitions in the weightlifting performance
weight is the given weight in kilograms
Estimates the weight lifted for the number of reps based on the 1-RM argument. Equation is the same as that of the predict method.
Brzycki, Matt. A Practical Approach to Strength Training. Indianapolis, IN: Masters, 1995. Print. ISBN 1-57028-018-5.
The Brzycki Two Set Max formula is a 1-RM prediction equation based on the number of repetitions to fatigue obtained two submaximal sets.
Reps and weight1 must represent the heavier submaximal weight repetition and rep2 and weight2 must represent the lighter submaximal weight
Brzycki, M. 2000. Assessing strength. Fitness Management 16(7): 34-37
The Epley formula for estimating a 1-Repetition Maximum (1-RM). For repetitions less than 10, the Epley formula returns slightly lower estimated 1-RM than the Brzycki formula. The two formulas are identical at 10 repetitions.
reps is the given number of repetitions in the weightlifting performance
EPLEY, B. (1985) Poundage Chart. Boyd Epley Workout. Lincoln, NE: Body Enterprises.
weight is the given weight lifted in kilograms
reps is the given number of repetitions in the weightlifting performance
LANDERS, J. (1985) Maximums Based on Reps. National Strength and Conditioning Association Journal. 6: 60-61.
weight is the given weight lifted in kilograms
Estimates the weight lifted for the number of reps based on the 1-RM argument. Equation is the same as that of the predict method.
Returns a percentage of the 1 repetition maximum (1-RM)
http://www.unm.edu/~rrobergs/478RMStrengthPrediction.pdf
For use with less than 11 repetitions
reps is the given number of repetitions in the weightlifting performance
weight is the given weight lifted in kilograms
Estimates the weight lifted for the number of reps based on the 1-RM argument. Equation is the same as that of the predict method.
LeSuer, Dale A.; McCormick, James H.; Mayhew, Jerry L.; Wasserstein, Ronald L.; Arnold, Michael D. (November 1997). "The Accuracy of Prediction Equations for Estimating 1-RM Performance in the Bench Press, Squat, and Deadlift". Journal of Strength and Conditioning Research. 11 (4): 211–213. doi:10.1519/00124278-199711000-00001
For use with less than 15 repetitions. Studied population was 434 (185 college men, 251 college women)
reps is the given number of repetitions in the weightlifting performance
weight is the given weight lifted in kilograms
LeSuer, Dale A.; McCormick, James H.; Mayhew, Jerry L.; Wasserstein, Ronald L.; Arnold, Michael D. (November 1997). "The Accuracy of Prediction Equations for Estimating 1-RM Performance in the Bench Press, Squat, and Deadlift". Journal of Strength and Conditioning Research. 11 (4): 211–213. doi:10.1519/00124278-199711000-00001
A maximal 1-RM equation for the NFL-225 Bench Press Test.
reps is the given number of repetitions in the weightlifting performance
http://digitalcommons.brockport.edu/cgi/viewcontent.cgi?article=1088&context=pes_facpub
Mayhew, J.L., Ball, T.E., Arnold, M.D., and Bowen, J.C. 1992. Relative muscular endurance performance as a predictor of bench press strength in college men and women. Journal of Applied Sport Science Research 6: 200-206
Mayhew, Jerry L., John S. Ware, Michael G. Bemben, Bill Wilt, Tom E. Ward, Bill Farris, Joe Juraszek, and John P. Slovak. "The NFL-225 Test as a Measure of Bench Press Strength in College Football Players." Journal of Strength and Conditioning Research 13.2 (1999): 130-34. Web.
Returns a percentage of the 1 repetition maximum (1-RM)
Estimates the weight lifted for the number of reps based on the 1-RM argument. Equation is the same as that of the predict method.
http://www.unm.edu/~rrobergs/478RMStrengthPrediction.pdf
reps is the given number of repetitions in the weightlifting performance
weight is the given weight lifted in kilograms
Estimates the weight lifted for the number of reps based on the 1-RM argument. Equation is the same as that of the predict method.
LeSuer, Dale A.; McCormick, James H.; Mayhew, Jerry L.; Wasserstein, Ronald L.; Arnold, Michael D. (November 1997). "The Accuracy of Prediction Equations for Estimating 1-RM Performance in the Bench Press, Squat, and Deadlift". Journal of Strength and Conditioning Research. 11 (4): 211–213. doi:10.1519/00124278-199711000-00001
reps is the given number of repetitions in the weightlifting performance
weight is the given weight lifted in kilograms
Returns a percentage of the 1 repetition maximum (1-RM)
LeSuer, Dale A.; McCormick, James H.; Mayhew, Jerry L.; Wasserstein, Ronald L.; Arnold, Michael D. (November 1997). "The Accuracy of Prediction Equations for Estimating 1-RM Performance in the Bench Press, Squat, and Deadlift". Journal of Strength and Conditioning Research. 11 (4): 211–213. doi:10.1519/00124278-199711000-00001
Estimates the weight lifted for the number of reps based on the 1-RM argument. Equation is the same as that of the predict method.
http://www.unm.edu/~rrobergs/478RMStrengthPrediction.pdf
The Reynolds formula for the Chest Press exercise. Weight parameter is the 5 rep maximum (5-RM) in kg.
reps is the given number of repetitions in the weightlifting performance
weight is the given weight lifted in kilograms
http://www.unm.edu/~rrobergs/478RMStrengthPrediction.pdf
The Reynolds formula for the Leg Press exercise. Weight parameter is the 5 rep maximum (5-RM) in kg.
reps is the given number of repetitions in the weightlifting performance
weight is the given weight lifted in kilograms
http://www.unm.edu/~rrobergs/478RMStrengthPrediction.pdf
The Wathan equation for predicted the 1 repetition maximum (1-RM). The Wathan equation most closely estimates 1-RM for all upper body exercises, the leg press, and dorsiflexion exercises, and can be used to determine resistance training intensities for older adults.
reps is the given number of repetitions in the weightlifting performance
weight is the given weight lifted in kilograms
Estimates the weight lifted for the number of reps based on the 1-RM argument. Equation is the same as that of the predict method.
LeSuer, Dale A.; McCormick, James H.; Mayhew, Jerry L.; Wasserstein, Ronald L.; Arnold, Michael D. (November 1997). "The Accuracy of Prediction Equations for Estimating 1-RM Performance in the Bench Press, Squat, and Deadlift". Journal of Strength and Conditioning Research. 11 (4): 211–213. doi:10.1519/00124278-199711000-00001
A class for making demographic-specific 1-RM predictions.
gender is either Fit.Gender.Male or Fit.Gender.Female
dob is a Date instance
weight is a number measured in kilograms
height is a number measured in meters
The 1 repetition maximum (1-RM) equation for estimating upper body strength from the YMCA bench press test in young men and women (22- 36 years old)
reps is the given number of repetitions in the weightlifting performance
For men: Total Bar weight = 80lb (36.3kg) Standard Error of Estimation = 17.6lb (8.0kg)
For women: Total Bar weight = 35lb (15.8kg) Standard Error of Estimation = 7lb (3.2kg)
Kim, Paul S., Jerry L. Mayhew, and D. Fred Peterson. "A Modified YMCA Bench Press Test as a Predictor of 1 Repetition Maximum Bench Press Strength." J Strength Cond Res The Journal of Strength and Conditioning Research 16.3 (2002): 440. NCBI. Web. 5 Nov. 2016. <https://www.ncbi.nlm.nih.gov/pubmed/12173960>.
A submaximal endurance test for middle-aged women. The participant completes as many repetitions as possible using a weight equivalent to 45% of her mass. For use with women ages 40-50 years old.
reps is the given number of repetitions in the weightlifting performance
weight is the given weight lifted in kilograms
Standard Error of Estimation = 4lb (1.85kg)
Kuramoto, Anna K., and V. Gregory Payne. "Predicting Muscular Strength in Women: A Preliminary Study." Research Quarterly for Exercise and Sport 66.2 (1995): 168-72. NCBI. Web. 5 Nov. 2016. <https://www.ncbi.nlm.nih.gov/pubmed/12173960>.
A submaximal endurance test for older women. The participant completes as many repetitions as possible using a weight equivalent to 45% of her mass. For use with women ages 60-70 years old.
reps is the given number of repetitions in the weightlifting performance
weight is the given weight lifted in kilograms
Standard Error of Estimation = 4.5lb (2.04kg)
Kuramoto, Anna K., and V. Gregory Payne. "Predicting Muscular Strength in Women: A Preliminary Study." Research Quarterly for Exercise and Sport 66.2 (1995): 168-72. NCBI. Web. 5 Nov. 2016. <https://www.ncbi.nlm.nih.gov/pubmed/12173960>.