You are educating a physical therapy technician on the use of cold pack versus hot pack treatments. Which of the following statements is FALSE?
1. Hot packs penetrate more deeply than cold packs
2. Cold increases the thickness of a fluid and heat decreases the thickness of a fluid
3. Cold decreases spasms by decreasing the sensitivity to muscle spindles and heat decreases spasms by increasing the nerve conduction velocity (NCV)
4. Cold increases the rate of oxygen uptake, and heat decreases the rate of oxygen uptake
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