2. Isometric vs Isotonic Contraction
Isometric – tension increases during contraction, but muscle does not shorten
How is that possible?
Maintains posture
Isotonic – tension doesn’t change during contraction; individual sarcomeres shorten -> shortening of muscle
Posture and movement
Isotonic = lifting weights; Isometric = lifting weights, but weights don’t move

3. Strength of Muscle Contraction
Metabolic condition – production of ATP
Recruitment – number of fibers involved
Length-tension
Load – greater load = stronger contraction

5. DMD – dystrophin?
Dystrophin is a protein that connects sarcolemma to actin
DMD?

6. ALS Amyotrophic Lateral Sclerosis
Neurological disorder, so why talk about it in muscle unit?

7. Muscles How do your muscles respond to exercise?
How do muscles increase strength? Stamina?

8. Test Tuesday
Review Monday
Come with questions!