What should individuals with hypertension or cardiac issues avoid during group classes?

Individuals with hypertension or cardiac issues should generally avoid high-intensity activities that can cause sudden spikes in heart rate and blood pressure. Interval training is particularly intense, involving repetitive cycles of high-intensity efforts followed by rest or low-intensity recovery periods. This type of workout can lead to increased cardiovascular strain, which is concerning for individuals with these specific health conditions.

On the other hand, group stretching sessions, cardio workouts, and bodyweight exercises can often be adapted to different fitness levels and may not place the same level of stress on the cardiovascular system. Stretching is usually gentle and focuses on flexibility rather than intense effort. Cardio workouts can vary in intensity and can sometimes be performed at a moderate pace that is heart-healthy. Bodyweight exercises may also be modified for lower intensity to ensure safety and effectiveness.

Thus, the nature of interval training makes it the most unsuitable option for individuals with hypertension or cardiac issues, as the potential for high-intensity spikes in exercise is significant, and safer alternatives are available.