How Muscles Work
What does your brain send to tell your muscles to move?
A signal or message
Which muscle type is used in long walks or runs?
Slow-twitch (Type I)
What do people call workouts that build big muscles?
Hypertrophy training
What happens to your muscles when you work out often?
They get stronger or bigger
Your friend wants to get stronger. What training should they do?
Lift heavy weights
What chemical helps your nerves talk to your muscles?
Acetylcholine
Which muscle type is best for fast sprints or jumps?
Fast-twitch (Type IIx)
What do we call training with heavy weights and low reps?
Strength training
What improves in your body when you do cardio often?
Stamina or endurance
You want to run a 10K race. What should you train for?
Endurance
What’s the name of the stuff that gives your muscles energy?
ATP
Which muscle type is strong and can go for longer?
Type IIa
What’s a good example of power training?
Sprinting or box jumps
What builds up when you sprint too hard and feel “the burn”?
Lactic acid
What kind of workouts are best for fast moves and jumping high?
Power training
What tiny thing inside your muscle moves to make it contract?
Myosin or muscle fibers
Which fibers get tired the fastest?
Type IIx
What training is best for endurance?
Cardio or high reps
Which muscles grow faster: ones you use a lot or ones you rest?
Ones you use a lot
What would you tell someone who wants to grow their muscles?
Train consistently, eat enough, rest
What ion (charged particle) is released to help your muscles contract?
Calcium
True or False: All people have the same muscle fiber mix.
False
Which training makes you sweat for a long time but not lift heavy?
Endurance training (like running or cycling...)
What part of your body helps use oxygen better after endurance training?
Muscles or lungs (either)
Think of a workout with 3 exercises for strength.
Any correct combo (e.g., squats, deadlifts, pushups)