APHYS- Skeletal Muscle Histology and Biochemistry of an Elite
Transcript of APHYS- Skeletal Muscle Histology and Biochemistry of an Elite
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SKELETAL MUSCLE HISTOLOGY AND BIOCHEMISTRY OF AN
ELITE SPRINTER, THE AFRICAN CHEETAH
T. M. WILLIAMS, G. P. DODSON, O. MATHIEU-COSTELLO, D. MORSBACH, M. B. WORLEY, AND J. A. PHILIPS.
VALERIE SAMUELS
ELIZABETH TAMEZ
ROSIE LEON
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INTRODUCTION
• PURPOSE OF THIS STUDY – TO DEVELOP A SKELETAL MUSCLE PROFILE FOR CHEETAHS
• CHEETAHS CAN RUN IN EXCESS OF 60 MPH, 3X AS FAST AS OLYMPIC HUMAN SPRINTERS
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BACKGROUND INFO
• MUSCLE PHYSIOLOGY
• ANAEROBIC METABOLIC PATHWAY/TCA
• SHORT CHEETAH VIDEO?
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HYPOTHESIS
FIBER TYPE COMPOSITION, MITOCHONDRIAL CONTENT, AND GLYCOLYTIC ENZYME CAPACITIES IN THE LOCOMOTOR MUSCLES OF A CHEETAH ARE BUILT FOR ANAEROBIC BASED PERFORMANCE WHEN COMPARED TO OTHER MAMMALIAN SPRINTERS
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MATERIALS & METHODS
• MUSCLES TEST FOR: (ARROWS POINTING TO MUSCLE)
• FIBER COMPOSITION,
• ENZYME ACTIVITY,
• MB CONC.,
• VOLUME DENSITY OF MITOCHONDRIA, MYOFIBRILS, AND LIPID DROPLETS
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RESULTS
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DISCUSSION SUMMARY
• SKELETAL MUSCLE WORK IN SUPPORT OF ANAEROBIC METABOLISM
• INCREASE OF LDH AND PK ENZYMES IN GLYCOLYTIC PATHWAYS
• MYOGLOBIN OXYGEN STORAGE WAS 2X HIGHER
• FAST-TWITCH FIBERS IN VASTUS LATERALIS
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QUESTIONS?
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CONCLUSION