[quote]Cam Birtwell wrote:
Please don’t listen to this. This statement is so wrong it makes my brain itself hurt to read it.
You indeed can change slow twitch to fast twitch fibers through high force, eccentric based training, such as depth jumps/drops, drop and catch weight movements, and sprints.
You, my friend, have no clue about what you are talking about. I’m sure your brain hurts, but it’s probably from the effort of tying your own shoes.
Good luck, Forrest.
To the OP, do like the others are suggesting - train with power moves and your sprint workouts and you should be fine. You won’t change slow to fast but you will maximize the potential of your existing FT fibers through hypertrophy, intramuscular coordination adn intermuscular coordination. Good luck
No need to be rude. I’m about to prove you wrong.
Adaptation to chronic eccentric exercise in humans: the influence of contraction velocity.
* Paddon-Jones D,
* Leveritt M,
* Lonergan A,
* Abernethy P.
Department of Surgery, University of Texas Medical Branch, Galveston 77550, USA. firstname.lastname@example.org
We compared changes in muscle fibre composition and muscle strength indices following a 10 week isokinetic resistance training programme consisting of fast (3.14 rad x s(-1)) or slow (0.52 rad x s(-1)) velocity eccentric muscle contractions. A group of 20 non-resistance trained subjects were assigned to a FAST (n = 7), SLOW (n = 6) or non-training CONTROL (n = 7) group. A unilateral training protocol targeted the elbow flexor muscle group and consisted of 24 maximal eccentric isokinetic contractions (four sets of six repetitions) performed three times a week for 10 weeks. Muscle biopsy samples were obtained from the belly of the biceps brachii. Isometric torque and concentric and eccentric torque at 0.52 and 3.14 rad x s(-1) were examined at 0, 5 and 10 weeks. After 10 weeks, the FAST group demonstrated significant [mean (SEM)] increases in eccentric [29.6 (6.4)%] and concentric torque [27.4 (7.3)%] at 3.14 rad x s(-1), isometric torque [21.3 (4.3)%] and eccentric torque [25.2 (7.2)%] at 0.52 rad x s(-1). The percentage of type I fibres in the FAST group decreased from [53.8 (6.6)% to 39.1 (4.4)%] while type IIb fibre percentage increased from [5.8 (1.9)% to 12.9 (3.3)%; P < 0.05]. In contrast, the SLOW group did not experience significant changes in muscle fibre type or muscle torque. We conclude that neuromuscular adaptations to eccentric training stimuli may be influenced by differences in the ability to cope with chronic exposure to relatively fast and slow eccentric contraction velocities. Possible mechanisms include greater cumulative damage to contractile tissues or stress induced by slow eccentric muscle contractions.
As you can see, it is indeed possible to change your fiber type ratio. Now, try and think before insulting someone.