New Trends In Strength Training

Professor: Exercise Physiology and Biochemistry

Director: Exercise Physiology Laboratories

Department of Health, Sports and Exercise Sciences

University of New Mexico

Robert Robergs

Strength, Power and Other Determinants Of Sports Performance

• VO2max

• Economy

• Efficiency

• Metabolic Threshold

• Cardiovascular

• Physique & Body Composition

• Strength and Power

• Motor Unit Proportions

• Psychology

Body Composition/Physique

Problem There is no gold standard of measurement!

Motor Unit Proportions

Slow-twitch fiber Fast-twitch fiber

Fast-twitch oxidative fiber

myosin-ATPase stain

preincubation pH=4.6

Fiber TypingATPase Stain Technique

pH 4.3 4.6 10.4

Slow Oxidative

Fast Glycolytic

Fast Oxidative

ClassificationMethod

Nomenclature

Visual Red White

Contractile Velocity Slow-twitch Fast-twitch

Contractile Velocityand Metabolism

ISlow-twitch

IIabFast-twitch

intermediate

IIaFast-twitch

fatigueresistant

IIbFast-twitchfatigable

Contractile Velocityand Metabolism

SSlow-twitch

F(int)Fast-twitch

intermediate

FRFast-twitch

fatigueresistant

FFFast-twitchfatigable

Contractile Velocityand Metabolism

SOSlow-twitch

oxidative

FOGFast-twitchoxidativeglycolytic

FGFast-twitchglycolytic

Classification nomenclature of mammalian motor units

We need more of a science baseto strength training

Thank you

rrobergs@unm.eduwww.unm.edu/~rrobergs