Variable resistance versus constant resistance strength training in adult males

Area of Science:

• Exercise Physiology
• Sports Science
• Biomechanical Engineering

Background:

• Resistance training is a cornerstone of physical conditioning.
• Constant Resistance (CR) and Variable Resistance (VR) are two distinct training modalities.
• Understanding their differential effects on strength and body composition is crucial for optimizing training protocols.

Purpose of the Study:

• To compare the effects of CR and VR training on muscular strength.
• To evaluate changes in body composition and anthropometric measures between CR and VR groups.
• To determine if one resistance training method offers superior adaptations.

Main Methods:

• Thirty-six male volunteers were randomized into Constant Resistance (CR), Variable Resistance (VR), or Control (C) groups.
• Strength training was performed 3 times per week for 10 weeks.
• Strength was assessed using both CR and VR protocols; body composition and anthropometrics were also measured.

Main Results:

• Both CR and VR groups showed significant increases in muscular strength.
• The CR group exhibited greater strength gains when assessed with CR procedures.
• The VR group showed greater strength gains when assessed with VR procedures; no significant differences in body composition or anthropometrics were observed between CR and VR groups.

Conclusions:

• The effectiveness of resistance training on strength is dependent on the assessment method.
• Neither CR nor VR training demonstrated superiority for improving body composition or anthropometric measures.
• Training specificity may influence strength assessment outcomes in resistance exercise interventions.