Electromechanical Changes in Rat Gastrocnemius Following Exercise Training and Steroid Administration
| Autor: | Eileen M. Leeds, Gary Kamen, Don Bredle, James E. Wilkerson, Gordon D. Brown |
|---|---|
| Rok vydání: | 1988 |
| Předmět: |
medicine.medical_specialty
business.industry medicine.medical_treatment Physical Therapy Sports Therapy and Rehabilitation General Medicine Muscle mass Body weight Steroid Vertical jump Gastrocnemius muscle Endocrinology Nephrology Internal medicine medicine Orthopedics and Sports Medicine medicine.symptom Twitch force business Anabolic steroid Muscle contraction |
| Zdroj: | Research Quarterly for Exercise and Sport. 59:131-138 |
| ISSN: | 2168-3824 0270-1367 |
| DOI: | 10.1080/02701367.1988.10605490 |
| Popis: | An experiment was conducted to determine the combined effects of exercise and anabolic steroid treatment on muscle contractile and electromechanical properties in male and female rats. The exercised animals were trained to perform a 16-cm vertical jump with an increasing load over an 8-week period. Steroid-treated animals were given nandrolone phenpropionate (Durabolin; 0.2 mg/day) over the last 3 weeks. Contractile properties and electromechanical delay (interval between electrical activation and mechanical onset, [EMD]) were measured in the gastrocnemius muscle after 8 weeks. The steroid treatment produced a greater effect in the female animals as indicated by increases in body weight and twitch force and a decrease in EMD. The exercise protocol produced increases in tetanic tension. Faster EMD scores occurred following both exercise and steroid treatments which were independent of muscle mass. These results demonstrate that 1) exercise and anabolic steroid administration produce distinct gende... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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