Post Bande-élastiques

Les recherches sur les entraînements avec bandes (ou élastiques, c'est pareil)

ACUTE EFFECTS OF ELASTIC BANDS DURING THE FREE-WEIGHT BARBELL BACK SQUAT EXERCISE ON VELOCITY,POWER, AND FORCE PRODUCTION

MARK W. STEVENSON,1 JOSEPH M. WARPEHA,2 CAL C. DIETZ,3 RUSSELL M. GIVEANS,2 AND ARTHUR G. ERDMAN1

1Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota; 2Laboratory of Physiological
Hygiene and Exercise Science, School of Kinesiology, University of Minnesota, Minneapolis, Minnesota; and 3Department of
Athletics, University of Minnesota, Minneapolis, Minnesota

24(11)/2944–2954 Journal of Strength and Conditioning Research
2010 National Strength and Conditioning Association

Citation :

The use of elastic bands in resistance training has been reported to be effective in increasing performance-related parameters such as power, rate of force development (RFD), and velocity. The purpose of this study was to assess the following measures during the free-weight back squat exercise with and without elastic bands: peak and mean velocity in the eccentric and concentric phases (PV-E, PV-C,MV-E, MV-C), peak force (PF), peak power in the concentric phase, and RFD immediately before and after the zero-velocity point and in the concentric phase (RFDC). Twenty trained male volunteers (age = 26.0 +- 4.4 years) performed 3 sets of 3 repetitions of squats (at 55%one repetition maximum [1RM]) on 2 separate days: 1 day without bands and the other with bands in a randomized order. The added band force equaled 20% of the subjects’ 55% 1RM. Two independent force platforms collected ground reaction force data, and a 9-camera motion capture system was used for displacement measurements. The results showed that PV-E and RFDC were significantly (p<0.05) greater with the use of bands, whereas PV-C and MV-C were greater without bands. There were no differences in any other variables. These results indicate that there may be benefits to performing squats with elastic bands in terms of RFD. Practitioners concerned with improving RFD may want to consider incorporating this easily implemented training variation.

KINETIC AND KINEMATIC DIFFERENCES BETWEEN SQUATS PERFORMED WITH AND WITHOUT ELASTIC BANDS

MICHAEL A. ISRAETEL,JEFFREY M. MCBRIDE,JAMES L. NUZZO,JARED W. SKINNER,AND ANDREA M. DAYNE
Neuromuscular Laboratory, Department of Health, Leisure and Exercise Science, Appalachian State University, Boone,
North Carolina

24(1)/190–194 Journal of Strength and Conditioning Research 2010 National Strength and Conditioning Association

Citation :

The purpose of this investigation was to compare kinetic and kinematic variables between squats performed with and without elastic bands equalized for total work. Ten recreationally weight trained males completed 1 set of 5 squats without (Wht) and with (Band) elastic bands as resistance. Squats were completed while standing on a force platform with bar displacement measured using 2 potentiometers. Electromyography (EMG) was obtained from the vastus lateralis. Average force-time, velocity-time, power-time, and EMG-time graphs were generated and statistically analyzed for mean differences in values between the 2 conditions during the eccentric and concentric phases. The Band condition resulted in significantly higher forces in comparison to theWht condition during the first 25% of the eccentric phase and the last 10% of the concentric phase (p<=0.05). However, the Wht condition resulted in significantly higher forces during the last 5% of the eccentric phase and the first 5% of the concentric phase in comparison to the Band condition. The Band condition resulted in significantly higher power and velocity values during the first portion of the eccentric phase and the latter portion of the concentric phase. Vastus lateralis muscle activity during the Band condition was significantly greater during the first portion of the eccentric phase and latter portion of the concentric phase as well. This investigation indicates that squats equalized for total work with and without elastic bands significantly alter the force-time, power-time, velocity-time, and EMG-time curves associated with the movements. Specifically, elastic bands seem to increase force, power, and muscle activity during the early portions of the eccentric phase and latter portions of the concentric phase.

ELASTIC BAND PREDICTION EQUATIONS FOR COMBINED FREE-WEIGHT AND ELASTIC BAND BENCH PRESSES AND SQUATS

TODD C. SHOEPE,DAVID A. RAMIREZ, AND HAWLEY C. ALMSTEDT
Human Performance Laboratory, Department of Natural Science, Loyola Marymount University, Los Angeles, California

24(1)/195–200 Journal of Strength and Conditioning Research
2010 National Strength and Conditioning Association

Citation :

Elastic bands added to traditional free-weight techniques have become a part of suggested training routines in recent years. Because of the variable loading patterns of elastic bands (i.e., greater stretch produces greater resistance), it is necessary to quantify the exact loading patterns of bands to identify the volume and intensity of training. The purpose of this study was to determine the length vs. tension properties of multiple sizes of a set of commonly used elastic bands to quantify the resistance that would be applied to free-weight plus elastic bench presses (BP) and squats (SQ). Five elastic bands of varying thickness were affixed to an overhead support beam. Dumbbells of varying weights were progressively added to the free end while the linear deformation was recorded with each subsequent weight increment. The resistance was plotted as a factor of linear deformation, and best-fit nonlinear logarithmic regression equations were then matched to the data. For both the BP and SQ loading conditions and all band thicknesses tested, R2 values were greater than 0.9623. These data suggest that differences in load exist as a result of the thickness of the elastic band, attachment technique, and type of exercise being performed. Facilities should adopt their own form of loading quantification to match their unique set of circumstances when acquiring, researching, and implementing elastic band and free-weight exercises into the training programs.

tu pourras faire un petit bilan en Francais je suis une quiche en anglais me très interessait par l'article

https://powerandstrength.forumactif.com/t2489-fonctionnement-de-la-rubrique