Variable resistance versus constant resistance strength training in adult males

1978 ◽  
Vol 39 (1) ◽  
pp. 27-35 ◽  
Author(s):  
Thomas V. Pipes
Keyword(s):  
Strength Training ◽  
Adult Males ◽  
Variable Resistance ◽  
Constant Resistance

scholarly journals The Therapress 1600i: Accelerating Knee Rehabilitation

2009 ◽  
Vol 3 (2) ◽  
Author(s):  
A. Geronimo ◽  
M. Holyoak ◽  
M. Oliver ◽  
E. Scherm ◽  
M. Paliwal
Keyword(s):  
Physical Therapy ◽  
Strength Training ◽  
Vastus Lateralis ◽  
Continuous Variable ◽  
Quadriceps Strength ◽  
Emg Activity ◽  
Time Data ◽  
Variable Resistance ◽  
The Subject ◽  
Knee Disorders

Objective: To design a ‘smart’ leg press machine that improves upon current rehabilitative practices for degenerative knee disorders such as osteoarthritis as well as injury induced knee pathologies. As its design entails, the machine provides rehabilitative assistance through strength training of upper leg muscles, with focus on the vastus medialis and vastus lateralis of the quadriceps group. The Therapress is designed to further improve the rate and quality of joint rehabilitation. The TP1600i is unique to current physical therapy practices because it incorporates three documented and proven strategies to combat quadriceps weakness: strength training, electrotherapy, and biofeedback [1,2]. The machine is designed to aid the user in regaining lost quadriceps strength, a condition indicative of poor knee health [3]. The machine incorporates a novel package of biofeedback, automated continuous variable resistance, and progress assessment, while maintaining subject specificity. The Therapress system utilizes a LabVIEW interface, which acquires and processes physiological signals recorded from the subject, as well as serves as a controller for output. These signals include surface electromyography (EMG) of the quadriceps, reaction forces at the foot (an indirect measurement of exercise resistance), and knee range of motion (ROM). Additionally, the subject is outfitted with stimulatory electrodes which function to characterize muscle recruitment using the Central Activation Ratio (CAR), as well as to therapeutically excite the muscle and induce accelerated hypertrophy [4]. Automated continuous variable resistance is achieved through a resistive hydraulic cylinder, which utilizes a servo motor to change the orifice size of partially overlapping valves during and between exercise sets. The resistance is adjusted based on user input of exertion and pain levels into the LabVIEW interface. The footplate of the machine houses four force sensing units to measure the resistance offered by the cylinder. A biofeedback arm attached to the system provides the subject with real-time data of their performance, including integrated EMG activity, ROM, and force production. Inclusion of biofeedback in quadriceps exercise regimens has been shown to increase strength gain [2]. The design allows the user to be in control of the exercise intensity at all times, while the machine works to maximize the efficacy of the protocol. The TP1600i is designed as a cost effective and time efficient alternative for the rehabilitation of debilitating knee disorders in a physical therapy protocol, and its ease of operation may qualify it for home use as well.

The Mechanical Effects of Constant Resistance Compared to Variable Resistance Using Chains during Back Squats

2014 ◽  
Vol 46 ◽  
pp. 243
Author(s):  
Gavin L. Moir ◽  
Joseph M. Percia ◽  
Shala E. Davis ◽  
Chad A. Witmer
Keyword(s):  
Variable Resistance ◽  
Mechanical Effects ◽  
Constant Resistance

Development of a muscle strength training device with variable resistance using pneumatic artificial rubber muscle

2019 ◽  
Vol 2019 (0) ◽  
pp. 1P1-R01
Author(s):  
Tomoya NAKANISHI ◽  
Toshihiro KAWASE ◽  
Junya AIZAWA ◽  
Shintaro YOSHIDA ◽  
Shingo OONO ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Strength Training ◽  
Training Device ◽  
Variable Resistance

Estimating the Effect of Dynamic Variable Resistance in Strength Training

2016 ◽  
pp. 26-35
Author(s):  
Tomosuke Komiyama ◽  
Yoshiki Muramatsu ◽  
Takuya Hashimoto ◽  
Hiroshi Kobayashi
Keyword(s):  
Strength Training ◽  
Dynamic Variable ◽  
Variable Resistance

Variable resistance training promotes greater fatigue resistance but not hypertrophy versus constant resistance training

2013 ◽  
Vol 113 (9) ◽  
pp. 2233-2244 ◽  
Author(s):  
Simon Walker ◽  
Juha J. Hulmi ◽  
Mathias Wernbom ◽  
Kai Nyman ◽  
William J. Kraemer ◽  
...  
Keyword(s):  
Resistance Training ◽  
Fatigue Resistance ◽  
Variable Resistance ◽  
Constant Resistance

scholarly journals EFFECTS OF CONCENTRIC AND ECCENTRIC HAMSTRING STRENGTH TRAINING ON 1-RM VALUES IN HEALTHY ADULT MALES

1999 ◽  
Vol 31 (Supplement) ◽  
pp. S230
Author(s):  
T A Marler ◽  
R W Motl ◽  
S C Johnson ◽  
J A Walker ◽  
A W Subudhi
Keyword(s):  
Strength Training ◽  
Healthy Adult ◽  
Adult Males

Characterization of Tamm-Horsfall Urinary Glycoprotein

1973 ◽  
Vol 31 ◽  
pp. 420-421
Author(s):  
John P. Robinson ◽  
J. David Puett
Keyword(s):  
Electron Microscopy ◽  
Circular Dichroism ◽  
Secondary Structure ◽  
Quaternary Structure ◽  
Normal Adult ◽  
Morphological Properties ◽  
Adult Males ◽  
Circular Dichroïsm ◽  
Urinary Glycoprotein

Much work has been reported on the chemical, physical and morphological properties of urinary Tamm-Horsfall glycoprotein (THG). Although it was once reported that cystic fibrotic (CF) individuals had a defective THG, more recent data indicate that THG and CF-THG are similar if not identical.No studies on the conformational aspects have been reported on this glycoprotein using circular dichroism (CD). We examined the secondary structure of THG and derivatives under various conditions and have correlated these results with quaternary structure using electron microscopy.THG was prepared from normal adult males and CF-THG from a 16-year old CF female by the method of Tamm and Horsfall. CF female by the method of Tamm and Horsfall.

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