Dosage-Adjusted Resistance Training in Mice with a Reduced Risk of Muscle Damage

作者： Morium Begam1, Neha Narayan1, Drew Mankowski1, Robert Camaj1, Nicholas Murphy1, Kevin Roseni1, Marie E. Pepin1, Jacob M. Blackmer1, Takako I. Jones2, Joseph A. Roche1 1Physical Therapy Program, Department of Health Care Sciences, Eugene Applebaum College of Pharmacy and Health Sciences,Wayne State University, 2Department of Pharmacology,University of Nevada, Reno School of Medicine

简介：

Overview

This study presents a protocol for dosage-adjusted resistance training (DART) in mice, enabling precise adjustments to the resistance during muscle training. The technique focuses on the anterior tibial muscles and aims to enhance or maintain muscle mass and strength under various disease conditions.

Key Study Components

Area of Science

• Resistance Training
• Neurophysiology
• Molecular Biology

Background

• Dosage-adjusted resistance training allows tailored muscle training in small animals.
• Focus on eccentrically biased contractions reduces injury risk.
• The anterior tibial muscles are specifically targeted due to their crucial role in locomotion.
• Previous methods lacked precision in resistance adjustment, impacting training efficacy.

Purpose of Study

• To develop a reliable method for implementing DART in preclinical studies.
• To investigate muscle response and adaptations to controlled resistance training.
• To assess exercise tolerance and muscle injury susceptibility post-training.

Methods Used

• The primary platform involves a DART device for resistance training.
• The biological model used is mice, focusing on the anterior tibial muscles and sciatic nerve stimulation.
• Electrical stimulation protocols are detailed to optimize contractions in targeted muscles.
• Protocols include careful animal preparation and step-by-step training implementation.
• Histological analyses of muscle damage were performed post-training.

Main Results

• Muscle damage was minimal, with a slight increase observed in isometric training compared to DART.
• The precise stimulation of the anterior tibial muscles improves training outcomes.
• Training led to measurable adaptations, confirming the efficacy of DART.
• Investigator modifications led to better accuracy in stimulation delivery and resistance adjustment.

Conclusions

• The DART protocol enables enhanced muscle training precision, potentially aiding in neuromuscular disease research.
• The study highlights the importance of tailored resistance training for understanding muscle dynamics.
• Future applications could investigate various muscle conditions and recovery protocols.

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