Factors affecting muscle contraction: By observing the intensity and speed of muscle contraction, explore the influence of different stimuli (such as nerve stimulation, drug stimulation, etc.). ) About muscle contraction.

Relationship between blood pressure and heart rate: By recording the changes of resting heart rate, heart rate and blood pressure after exercise, explore the influence of exercise on heart rate and blood pressure, and explore the relationship between them.

Respiratory and lung function research: Using the lung function tester, the relationship between respiratory frequency, tidal volume, vital capacity and lung function, and the influence of exercise, smoking and other factors on respiratory and lung function were discussed.

Influence of light reflection on pupil: By controlling light sources with different brightness and colors, observe the change of pupil size and study the influence of light reflection on pupil.

EEG and Sleep Research: By recording EEG signals, we explore the sleep cycle, EEG patterns at different stages and other indicators, and study the physiological mechanism and influencing factors of sleep.

These topics are common research fields in medical physiology and can be further studied according to personal interests and abilities. Of course, the specific project design needs to be selected and adjusted according to the actual situation and the limitation of experimental equipment.