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J. L. Mayhew, Chad D. Kerksick, Doug Lentz, John S. Ware, and David L. Mayhew

The purpose of this study was to evaluate the effectiveness of repetitions to fatigue (RTF) for estimating one-repetition maximum (1-RM) bench press performance in male high school athletes. Members of high school athletic teams (N = 213, age = 16.3 ± 1.1 yrs, weight = 79.9 ± 16.7 kg) from four states were tested for 1-RM bench press and RTF after completing 4–6 weeks of resistance training. A new equation for use with male high school athletes was developed from a random sample of 180 participants; it appears to have excellent predictive potential (r = 0.96, SEE = 4.5 kg) and cross-validated well on a subsample (n = 33) from this population (r = 0.98, t = 0.64). Therefore, RTF can be used with acceptable accuracy to estimate maximal strength in the majority of adolescent male athletes who need to handle excessively heavy weights.

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Irineu Loturco, Timothy Suchomel, Chris Bishop, Ronaldo Kobal, Lucas A. Pereira, and Michael McGuigan

-velocity relationship for 1RM prediction . J Strength Cond Res . 2011 ; 25 : 267 – 270 . PubMed ID: 19966589 doi:10.1519/JSC.0b013e3181b62c5f 19966589 10.1519/JSC.0b013e3181b62c5f 14. Ruf L , Chery C , Taylor KL . Validity and reliability of the load-velocity relationship to predict the one-repetition

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Sijie Tan, Jianxiong Wang, and Shanshan Liu

The purpose of this study was to establish the one-repetition maximum (1RM) prediction equations of a biceps curl, bench press, and squat from the submaximal skeletal muscle strength of 4–10RM or 11–15RM in older adults. The first group of 109 participants aged 60–75 years was recruited to measure their 1RM, 4–10RM, and 11–15RM of the three exercises. The 1RM prediction equations were developed by multiple regression analyses. A second group of participants with similar physical characteristics to the first group was used to evaluate the equations. The actual measured 1RM of the second group correlated significantly to the predicted 1RM obtained from the equations (r values were from .633–.985), and standard error of estimate ranged from 1.08–5.88. Therefore, the equations can be used to predict 1RM from submaximal skeletal muscle strength accurately for older adults.

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Jerónimo Aragón-Vela, Yaira Barranco-Ruiz, Cristina Casals-Vázquez, Julio Plaza-Díaz, Rafael A. Casuso, Luis Fontana, and Jesús F. Rodríguez Huertas

and performance of athletes’ lower body is half squat ( McMaster, Gill, Cronin, & McGuigan, 2014 ), both male and female athletes carried out a maximum incremental strength test (MIST) in a half-squat apparatus with increasing intensities until they reached their one repetition maximum (1RM). We show

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Aline C. Tritto, Salomão Bueno, Rosa M.P. Rodrigues, Bruno Gualano, Hamilton Roschel, and Guilherme G. Artioli

bench press in one-repetition maximum (1RM) tests. Exclusion criteria were as follows: smoking, current or past use of anabolic steroids or other banned substances, chronic use of anti-inflammatory drugs, use of creatine in the 3 months prior to the study, and a daily protein intake below 1.7 g/kg body

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María Hernández, Fabrício Zambom-Ferraresi, Pilar Cebollero, Javier Hueto, José Antonio Cascante, and María M. Antón

of the lower limbs The bilateral maximum dynamic strength (one-repetition maximum [1RM]) of the quadriceps femoris (QF) muscle was examined via the bilateral leg press exercise. A machine was used (Technogym, Gambettola, Italy) to measure the displaced load in the 1RM QF of the bilateral leg press

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Alex S. Ribeiro, Brad J. Schoenfeld, Danilo R.P. Silva, Fábio L.C. Pina, Débora A. Guariglia, Marcelo Porto, Nailza Maestá, Roberto C. Burini, and Edilson S. Cyrino

The purpose of this study was to compare different split resistance training routines on body composition and muscular strength in elite bodybuilders. Ten male bodybuilders (26.7 ± 2.7 years, 85.3 ± 10.4 kg) were randomly assigned into one of two resistance training groups: 4 and 6 times per week (G4× and G6×, respectively), in which the individuals trained for 4 weeks, 4 sets for each exercise performing 6–12 repetitions maximum (RM) in a pyramid fashion. Body composition was assessed by dual energy X-ray absorptiometry, muscle strength was evaluated by 1RM bench-press testing. The food intake was planned by nutritionists and offered individually throughout the duration of the experiment. Significant increases (p < .05) in fat-free mass (G4× = +4.2%, G6× = +3.5%) and muscular strength (G4× = +8.4%, G6× = +11.4%) with no group by time interaction were observed. We conclude that 4 and 6 weekly sessions frequencies of resistance training promote similar increases in fat-free mass and muscular strength in elite bodybuilders.

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Alejandro Pérez-Castilla, Ainara Jiménez-Alonso, Mar Cepero, Sergio Miras-Moreno, F. Javier Rojas, and Amador García-Ramos

prescribe both the intensity (commonly expressed as a percentage of the one-repetition maximum [1RM]) and volume (number of repetitions performed in each set) during resistance training ( González-Badillo, Marques, & Sánchez-Medina, 2011 ). An additional benefit of the real-time monitoring of movement

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Brandon J. Shad, Janice L. Thompson, James Mckendry, Andrew M. Holwerda, Yasir S. Elhassan, Leigh Breen, Luc J.C. van Loon, and Gareth A. Wallis

leg extension 1RM (kg) 82 ± 11 HF leg extension 1RM (kg) 81 ± 12 Note. Values are mean ±  SD . n  = 9. BMI = body mass index; 1RM = one-repetition maximum; LF = low frequency; HF = high frequency. Pretesting During the initial screening visit, the participants underwent maximal strength testing and

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Pedro Lopez, Mikel Izquierdo, Regis Radaelli, Graciele Sbruzzi, Rafael Grazioli, Ronei Silveira Pinto, and Eduardo Lusa Cadore

of the training period and the RT intensity prescription method (percentage of one-repetition maximum [%1-RM] vs. rate of perceived effort [RPE]) in the main outcomes. Methods Study Selection Procedure The study was undertaken in accordance with the Preferred Reporting Items for Systematic Reviews