What are the different muscle fiber types? | Live Science
Home References (Image credit: Getty) If your fitness goal is to up the ante on endurance, pack more power into your sprint, or supercharge your strength gains in the gym, it’s worth exploring – what are the different muscle fiber types?The muscle fibers activated during training vary depending on the type of exercise or sport you’re undertaking, so swotting up on the different muscle fiber types, how they work, and why they matter for sports performance, could help you become a more effective athlete. According to the Physical Therapy & Rehabilitation Journal (opens in new tab), human skeletal muscle is composed of a collection of two muscle fiber types traditionally categorized as type I (slow-twitch) and type II (fast-twitch). Slow-twitch fibers are utilized for aerobic exercise, contracting slower and with less power, but for longer periods. Fast-twitch fibers contract faster and with more force, but are better suited to anaerobic conditions and short periods. Find some of the best fitness trackers (opens in new tab) to power up your training motivation, or if it’s better muscular performance you’re after, you might love one of the best massage guns (opens in new tab) to relieve sore muscles. We spoke to experts to learn more…
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