The relationship between duration of stimulus per day and the extent of hypertrophy of slow-tonic skeletal muscle in the fowl, Gallus gallus.
1. Passive stretch stimulus ranging from 30 min to 8 hr per day were studied on the slow twitch latissimus dorsi muscle (ALD) of the fowl for a 5-week period. 2. A significant increase in the mass of the ALD was observed in all daily durations of stretch stimulus applied. Nearly 50% of the mass increase that occurred with stretch of 8 hr per day was obtained from durations of stretch as short as 30 min per day. 3. Given that stretch is the equal of dynamic loading with respect to increasing muscle mass, it is concluded that stretch stimulation periods as short as 30 min per day may be just as effective as longer durations when hypertrophy is the desired result, such as following fracture, or muscle building in order to enhance athletic performance. 4. In fact it may be that longer durations of daily stimulus may be detrimental to the muscle as the functional capacity may be compromised.
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School of Public Health, Curtin University of Technology, Perth, Western Australia.
D000818:Animals; D001834:Body Water / Q000378:metabolism; D002645:Chickens / Q000502:physiology*; D004558:Electric Stimulation; D005260:Female; D009124:Muscle Proteins / Q000378:metabolism; D009132:Muscles / Q000378:metabolism / Q000502:physiology*; D009929:Organ Size / Q000502:physiology
D009124:Muscle Proteins