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
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
BACKGROUND INFO
• MUSCLE PHYSIOLOGY
• ANAEROBIC METABOLIC PATHWAY/TCA
• SHORT CHEETAH VIDEO?
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
MATERIALS & METHODS
• MUSCLES TEST FOR: (ARROWS POINTING TO MUSCLE)
• FIBER COMPOSITION,
• ENZYME ACTIVITY,
• MB CONC.,
• VOLUME DENSITY OF MITOCHONDRIA, MYOFIBRILS, AND LIPID DROPLETS
RESULTS
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
QUESTIONS?
CONCLUSION
Top Related