Muscle Contractions, Strength & Training
A contraction where the muscle lengthens against resistance.
What is an eccentric contraction?
This type of waveform is unidirectional and has only one phase.
What is a monophasic waveform
This energy system produces ATP without oxygen and forms lactic acid
What is anaerobic glycolysis
This term describes the ability of a muscle to move weight through ROM.
What is dynamic strength
This type of electrotherapy is used for muscle re-education and cannot be used on denervated nerves.
What is NMES
This principle states muscles must be challenged with increased loads to gain strength.
What is the overload principle
This waveform type gradually increases and decreases in amplitude, forming a smooth shape.
What is sinusoidal
This system provides energy for high-intensity, short-duration activities like a 100-meter sprint
What is the ATP-PC system
This stretching technique involves a submaximal isometric contraction of a tight muscle for 6–10 seconds
What is hold-relax stretching
This uses electrical current to deliver medication like dexamethasone through the skin
What is iontophoresis
These muscle fibers fatigue quickly, generate high tension, and rely on anaerobic metabolism.
What are Type II fibers
These electrodes attract negative ions and may cause a weak acid reaction under the skin.
What is the anode
This value represents the maximum amount of oxygen the body can use during exercise.
What is VO2 max
This type of muscle fiber is slow-twitch, has high fatigability resistance, and relies on aerobic metabolism
What is Type I fiber
This law states that current is directly proportional to voltage and inversely proportional to resistance
What is Ohm’s Law
The ability to perform low-intensity, repetitive movements over time defines this aspect of performance.
What is muscular endurance?
High-volt stimulation requires this minimum voltage range and uses this type of waveform.
What is 100–500 volts and a twin-spike monophasic waveform
During aerobic exercise, heart rate typically increases by this many beats per minute per MET.
What is 8–12 bpm per MET
This principle states that muscle improvements are specific to the demands placed on them
What is the SAID principle
This graph shows the relationship between the intensity of an electrical stimulus and the amount of time required to produce a response
What is the Strength-Duration Curve
This type of contraction develops tension while the muscle shortens or lengthens at a constant speed.
What is an isokinetic contraction
This type of biphasic waveform has two phases of unequal shape or amplitude.
What is asymmetrical biphasic
In electrical stimulation, While using a current of 4mA how long should the duration be?
10 minutes
This term describes the loss of training effects after exercise is discontinued
What is the reversibility principle
This is defined as the least amount of current needed to elicit a muscle contraction with a long-duration stimulus
What is Rheobase