For rapid fatigue NMES, what pulse duration is listed in the parameters?

For rapid fatigue NMES, what pulse duration is listed in the parameters?

• A. 100
• B. 200
• C. 50
• D. 400

Answer: (B)

Pulse duration determines how long each electrical pulse lasts and influences how many motor units respond with each contraction. For rapid fatigue NMES, a duration of about 200 microseconds is used because it provides a reliable, fairly strong contraction without delivering excessive charge per pulse. This helps produce repeatable contractions across cycles, driving fatigue quickly as intended. Using much shorter durations (like 50 or 100 microseconds) can yield weaker, less consistent contractions, making fatigue onset unreliable. A longer duration (around 400 microseconds) increases charge per pulse and can change recruitment and fatigue dynamics, which isn’t ideal when the goal is a rapid and predictable fatigue response.

Pulse duration determines how long each electrical pulse lasts and influences how many motor units respond with each contraction. For rapid fatigue NMES, a duration of about 200 microseconds is used because it provides a reliable, fairly strong contraction without delivering excessive charge per pulse. This helps produce repeatable contractions across cycles, driving fatigue quickly as intended. Using much shorter durations (like 50 or 100 microseconds) can yield weaker, less consistent contractions, making fatigue onset unreliable. A longer duration (around 400 microseconds) increases charge per pulse and can change recruitment and fatigue dynamics, which isn’t ideal when the goal is a rapid and predictable fatigue response.