FAST-TWITCH VS. SLOW-TWITCH: WHAT’S THE DIFFERENCE AND WHY DOES IT MATTER?:
By STACEY PENNEY, MS, NASM-CPT, CES, PES, FNS What muscle fiber types will take an athlete from good to great? Looking to build endurance? What about power? Do dreams of being an all-star hitter or marathon runner need to be…
















































































