Optimal Loading during Two Different Leg-Press Movements in Female Rowers

Lund, Robin; Dolny, Dennis G.; Browder, Kathy

doi:10.1249/01.mss.0000106177.12763.2e

Cited by 5 publications

(4 citation statements)

References 26 publications

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“…The power-load curve observed followed those reported in previous studies for the leg press exercise (Macaluso and De Vito, 2003;Lund et al, 2004), with 40% and 60%1RM producing higher power than 80%1RM (P < 0.05). Analysis of power throughout the range of motion showed no systematic differences between the present resistance settings.…”

Section: Discussionsupporting

confidence: 85%

Kinetic and electromyographic analysis of single repetition constant and variable resistance leg press actions

Walker

Peltonen

Avela

et al. 2011

Journal of Electromyography and Kinesiology

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Section: Discussionsupporting

confidence: 85%

Kinetic and electromyographic analysis of single repetition constant and variable resistance leg press actions

Walker

Peltonen

Avela

et al. 2011

Journal of Electromyography and Kinesiology

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“…However, it still remains unclear whether and to which extent the particular components of external loads (i.e., W and I ) have selective affect on the aforementioned variables in complex human movements. A number of previous studies have been focused upon the optimum loading regarding the minimization of the energy expenditure (Teunissen et al, 2007) and maximization of output (Bevan et al, 2010, Cormie et al, 2007c, Lund et al, 2004, Markovic and Jaric, 2007, Nuzzo et al, 2010). Manipulation of external constant force in vertical direction that mimics change in W allowed for formulation of the Maximum Dynamic Output Hypothesis suggesting that for the lower limb muscles the optimal load for maximizing the power and momentum production could be the subject's own body (Jaric and Markovic, 2009).…”

Section: Introductionmentioning

confidence: 99%

Effects of loading on maximum vertical jumps: Selective effects of weight and inertia

Leontijević

Pažin

Bozic

et al. 2012

Journal of Electromyography and Kinesiology

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A novel loading method was applied to explore selective effects of externally added weight (W), weight and inertia (W+I), and inertia (I) on maximum counter-movement jumps (CMJ) performed with arm swing. Externally applied extended rubber bands and/or loaded vest added W, W+I, and I corresponding to 10–40% of subjects' body mass. As expected, an increase in magnitude of all types of load was associated with an increase in ground reaction forces (GRF), as well as with a decrease in both the jumping performance and power output. However, of more importance could be that discernible differences among the effects of W, W+I, and I were recorded despite a relatively narrow loading range. In particular, an increase in W was associated with the minimal changes in movement kinematic pattern and smallest reduction of jumping performance, while also allowing for the highest power output. Conversely, W+I was associated with the highest ground reaction forces. Finally, the lowest maxima of GRF and power were associated with I. Although further research is apparently needed, the obtained finding could be of potential importance not only for understanding fundamental properties of the neuromuscular system, but also for optimization of loading in standard athletic training and rehabilitation procedures.

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“…For example, the optimum load (L opt ) for maximizing MPO could be 0-59% of one repetition maximum (1RM) in vertical jumping (Baker et al 2001b;Izquierdo et al 1999;Markovic and Jaric 2007;Nuzzo et al 2010), 30-70% of 1RM in the bench press (Baker et al 2001a;Cronin et al 2001;Newton et al 1997;Siegel et al 2002;Thomas et al 1996), 60-68% of 1RM in the leg press (Lund et al 2004;Macaluso and De Vito 2003;Thomas et al 2007), or 30-40% of body weight (BW) in the Margaria test (Caiozzo and Kyle 1980;Kitagawa et al 1980), while in the cycling tasks (such as Wingate test) L opt could be within 5-10% of BW (Dore et al 2000;Dore et al 2003;Dotan and Bar-Or 1983;Evans and Quinney 1981;Patton et al 1985). The relatively wide intervals of these ranges observed both within and between various tasks could primarily originate from the differences in the datacollection techniques used (Hori et al 2007), type and position of the external loads applied (Cronin and Sleivert 2005;Jaric and Markovic 2009;Markovic and Jaric 2007), selected variables (e.g., peak or mean power; Cronin and Sleivert 2005), and particularly from the task specificity (Cronin and Sleivert 2005;Kawamori and Haff 2004;Vandewalle et al 1987).…”

Section: Introductionmentioning

confidence: 99%

Optimum loading for maximizing muscle power output: the effect of training history

et al. 2011

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Although the effect of external load on the mechanical output of individual muscle has been well documented, the literature still provides conflicting evidence regarding whether the optimum loading (L(opt)) for exerting the maximum muscle power output (MPO) could be different for individuals with different levels of strength and power. The aim of this study was to explore the effect of training history on L(opt) that maximizes MPO during the 6-s maximal cycling sprint test. Forty healthy young males (strength-and speed-trained athletes, and physically active and sedentary non-athletes) were tested on maximum strength, and on peak MPO when loaded 5-12% of body weight (BW). As expected, the strength trained and sedentary participants, respectively, revealed the highest and lowest strengths and MPO (p < 0.001). However, the main finding was a significant across-group difference in L(opt) (p < 0.001) revealing the values 9.7% (for strength trained), 9.2% (speed trained), 8.7% (active), and 8.0% of BW (sedentary individuals). This suggests that the effects of external loading on maximum MPO in complex functional movements could be training history dependent. In addition to revealing a sensitivity of the 6-s maximal cycling sprint tests (and, perhaps, other maximum cycling tests), the results suggest that the external loading in routine MPO tests should not be solely adjusted to a fixed percentage of subject's BW (as routinely done in standard tests), but also to their training history. The same phenomenon remains to be evaluated in a number of other routine tests of MPO and other maximum performance tasks.

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Optimal Loading during Two Different Leg-Press Movements in Female Rowers

Cited by 5 publications

References 26 publications

Kinetic and electromyographic analysis of single repetition constant and variable resistance leg press actions

Kinetic and electromyographic analysis of single repetition constant and variable resistance leg press actions

Effects of loading on maximum vertical jumps: Selective effects of weight and inertia

Optimum loading for maximizing muscle power output: the effect of training history

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