Final answer:
EMST and IMT typically require a tight lip seal for the exercises to create effective pressure and resistance for strengthening respiratory muscles; the statement is False.
Step-by-step explanation:
The statement that EMST (Expiratory Muscle Strength Training) and IMT (Inspiratory Muscle Training) do not require a tight lip seal for the exercises is False. Both EMST and IMT usually require a tight seal around the mouthpiece to ensure that the resistance provided by the training device is effective in strengthening the respiratory muscles. This tight seal is necessary to create enough pressure and resistance against which the muscles must work. However, there are different devices and approaches to EMST and IMT, and some may utilize alternative methods that don't require a tight lip seal, but these would be exceptions rather than the norm.