Prediction of 1 Repetition Maximum in High-School Power Lifters

Kravitz, Len; Akalan, Cengiz; Nowicki, Kenneth; Kinzey, Stephen J.

doi:10.1519/1533-4287(2003)017<0167:pormih>2.0.co;2

Cited by 36 publications

(29 citation statements)

References 7 publications

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“…Previous studies on the topic are equivocal, with some noting significant relationships of strength with FFM (26,27) and others finding a lack of relationship of structural dimension with strength (4,21). In this study, body composition did not seem to explain more than 55% of the variance in either 1RM or 28% in either work capacity.…”

Section: Discussioncontrasting

confidence: 77%

Factors That Contribute to and Account for Strength and Work Capacity in a Large Cohort of Recreationally Trained Adult Healthy Men With High- and Low-Strength Levels

Kerksick

Mayhew

Grimstvedt

et al. 2014

Journal of Strength and Conditioning Research

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The factors that best account for differences in strength across all types of exercise, body types, and training histories are not well understood. The purpose of this study was to assess the effects of strength level and body composition on upper- and lower-body work capacity in adult men. From a cohort of 295 adult men (25.6 ± 7.5 years, 178 ± 8 cm, 85.2 ± 15 kg), low-strength (LS, n = 72) and high-strength (HS, n = 66) samples were selected based on 1 repetition maximum (1RM) bench press (BP) and leg strength (LP) values. Work capacity for each exercise was determined from the product of repetition weight (80% 1RM) and maximum repetitions-to-fatigue (RTF). Body composition was measured using dual-energy x-ray absorptiometry. The HS group was significantly greater than the LS group in total body mass and fat-free mass but not in age, height, fat mass, or %fat. Low-strength and HS groups were not significantly different (p > 0.05) in RTF for either BP (8.7 ± 3.1 vs. 8.3 ± 1.9 reps, respectively) or LP (15.6 ± 7.6 vs. 17.0 ± 6.3 reps, respectively), making the ratio of RTF for BP vs. LP nonsignificant (LS = 2.0 ± 1.0; HS = 2.2 ± 0.9). The HS group produced significantly greater (p < 0.001) absolute and relative work capacities for both BP and LP compared with the LS group. Repetitions-to-fatigue had a greater influence on BP (r2 = 0.74) and LP (r2 = 0.85) work capacities in the LS group than did RepWt (r2 = 0.07 and 0.28, respectively). In the HS group, RTF (r2 = 0.79) had a greater influence than RepWt (r2 = 0.10) on BP work capacity, whereas the 2 components were more similar for LP work capacity (r2 = 0.64 and 0.47, respectively). When evaluated at the same %1RM, muscular endurance is similar across divergent strength levels meaning that work capacity (load × reps) will be greater for HS individuals. Controlling for the influence of body composition variables (e.g., fat or fat-free mass) does not eliminate the difference in work capacity between strength groups suggesting that other factors are accounting for strength expression. Prescribing repetitions against a fixed relative load is largely dependent on exercise type and must be considered by strength and conditioning professionals.

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Section: Discussioncontrasting

confidence: 77%

Factors That Contribute to and Account for Strength and Work Capacity in a Large Cohort of Recreationally Trained Adult Healthy Men With High- and Low-Strength Levels

Kerksick

Mayhew

Grimstvedt

et al. 2014

Journal of Strength and Conditioning Research

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“…Faigenbaum et al 52 evaluated the safety and efficacy of 1 repetition maximum (RM) testing in 96 children (6–12 years) and reported that healthy boys and girls can safely perform maximal effort strength tests on weight machines provided that appropriate testing procedures are followed. In other reports, children and adolescents safely performed 1 RM strength tests using free weights 36 37 53 54 55. These data suggest that children and adolescents can safely engage in this type of strength testing provided that appropriate loads are used, established guidelines are followed and qualified professionals are present.…”

Section: Incidence and Distribution Of Youth Resistance Training Injumentioning

confidence: 63%

Resistance training among young athletes: safety, efficacy and injury prevention effects

2009

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A literature review was employed to evaluate the current epidemiology of injury related to the safety and efficacy of youth resistance training. Several case study reports and retrospective questionnaires regarding resistance exercise and the competitive sports of weightlifting and power-lifting reveal that injuries have occurred in young lifters, although a majority can be classified as accidental. Lack of qualified instruction that underlies poor exercise technique and inappropriate training loads could explain, at least partly, some of the reported injuries. Current research indicates that resistance training can be a safe, effective and worthwhile activity for children and adolescents provided that qualified professionals supervise all training sessions and provide age-appropriate instruction on proper lifting procedures and safe training guidelines. Regular participation in a multifaceted resistance training programme that begins during the preseason and includes instruction on movement biomechanics may reduce the risk of sports-related injuries in young athletes. Strategies for enhancing the safety of youth resistance training are discussed.

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“…5 Estimation of maximum squatting load (1RM) was used as an indication of muscle strength of lower limbs. 6 For the muscle power of lower limbs, vertical jumps (VJ), 7 condition with counter-movement and free movement of the arms, and Vertical Power Jump (VPJ), 7 condition with counter-movement and restriction of arm movement .The jump height was quantified by the Globus Systems ® (Globus Brasil, RJ, Brazil) with 0.001 s precision.…”

Section: Methodsmentioning

confidence: 99%

Effects of Traditional Strength Training and Olympic Weightlifting in Handball Players

Slovak

Carvalho²,

Rodrigues

et al. 2019

Rev Bras Med Esporte

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Introduction Olympic weightlifting has been adopted as an alternative to plyometric exercise. However, the effects of these exercises in young handball athletes is not known. Objective To compare the effect of Olympic weightlifting training with traditional strength training on jumping, squatting and acceleration performance in young handball athletes. Ten female handball athletes were evaluated. After six weeks of regular training, the athletes underwent eight weeks of training specifically designed for the survey, with equivalence of the total volume of training and differences in the means used. The evaluations were performed after six weeks of regular training (Baseline), after four weeks of traditional strength training and after four weeks of Olympic weightlifting. Vertical Jumps with and without movement of the arms, acceleration of 10 m, 20 m and 30 m, and 1RM in squatting were quantified. Results Increases (p<0.05) were observed in accelerations and squatting in the Olympic weightlifting and in squatting in the traditional strength training. Differences in coordination, time to activation of the gastrocnemius, vastus lateralis, rectus femoris, biceps femoris and gluteus maximus, peak force and power and rate of force development between the jumps and exercises used in the training are hypotheses to be considered for the different responses adaptations found in the jumps. Conclusion The Olympic weightlifting training resulted in an increase in accelerations and strength, but not in vertical jump performance in young handball athletes. Level of Evidence I; Prognostic Studies - Investigation of the Effect of a Patient Characteristic on Disease Outcome.

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Prediction of 1 Repetition Maximum in High-School Power Lifters

Cited by 36 publications

References 7 publications

Factors That Contribute to and Account for Strength and Work Capacity in a Large Cohort of Recreationally Trained Adult Healthy Men With High- and Low-Strength Levels

Factors That Contribute to and Account for Strength and Work Capacity in a Large Cohort of Recreationally Trained Adult Healthy Men With High- and Low-Strength Levels

Resistance training among young athletes: safety, efficacy and injury prevention effects

Effects of Traditional Strength Training and Olympic Weightlifting in Handball Players

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