Final answer:
Stretching can be done at a slow speed while jumping jacks can be done at a fast speed in a laboratory.
Step-by-step explanation:
An exercise that can be done in the laboratory at a slow speed is stretching. Stretching involves elongating the muscles and improving flexibility. A subject can perform gentle stretches to warm up or cool down their muscles.
An exercise that can be done in the laboratory at a fast speed is jumping jacks. Jumping jacks are a high-intensity aerobic exercise that involves jumping while spreading the legs and raising the arms overhead.